Product Technical Specification &
Customer Design Guidelines
WISMO218 WIreless Standard MOdem
WA_DEV_W218_PTS_002
005
December 17, 2009
Download from Www.Somanuals.com. All Manuals Search And Download.
Product Technical Specification &
Customer Design Guidelines
Limitations of Liability
This manual is provided “as is”. Sierra Wireless makes no warranties of any kind, either expressed or
implied, including any implied warranties of merchantability, fitness for a particular purpose, or
noninfringement. The recipient of the manual shall endorse all risks arising from its use.
The information in this manual is subject to change without notice and does not represent a
commitment on the part of Sierra Wireless. SIERRA WIRELESS AND ITS AFFILIATES
SPECIFICALLY DISCLAIM LIABILITY FOR ANY AND ALL DIRECT, INDIRECT, SPECIAL,
GENERAL, INCIDENTAL, CONSEQUENTIAL, PUNITIVE OR EXEMPLARY DAMAGES
INCLUDING, BUT NOT LIMITED TO, LOSS OF PROFITS OR REVENUE OR ANTICIPATED
PROFITS OR REVENUE ARISING OUT OF THE USE OR INABILITY TO USE ANY SIERRA
WIRELESS PRODUCT, EVEN IF SIERRA WIRELESS AND/OR ITS AFFILIATES HAS BEEN
ADVISED OF THE POSSIBILITY OF SUCH DAMAGES OR THEY ARE FORESEEABLE OR FOR
CLAIMS BY ANY THIRD PARTY.
Notwithstanding the foregoing, in no event shall Sierra Wireless and/or its affiliates aggregate
liability arising under or in connection with the Sierra Wireless product, regardless of the number of
events, occurrences, or claims giving rise to liability, be in excess of the price paid by the purchaser
for the Sierra Wireless product.
Copyright
© 2009 Sierra Wireless. All rights reserved.
Trademarks
®
®
AirCard and “Heart of the Wireless Machine ” are filed or registered trademarks of Sierra Wireless.
®
Watcher is a trademark of Sierra Wireless, registered in the European Community. Sierra Wireless,
the Sierra Wireless logo, the red wave design, and the red-tipped antenna are trademarks of Sierra
Wireless.
®
®
®
,
,
, inSIM , “YOU MAKE IT, WE MAKE IT WIRELESS ”,
®
®
®
®
®
WAVECOM , WISMO , Wireless Microprocessor , Wireless CPU , Open AT are filed or registered
trademarks of Sierra Wireless S.A. in France and/or in other countries.
®
Windows is a registered trademark of Microsoft Corporation.
®
QUALCOMM is a registered trademark of QUALCOMM Incorporated. Used under license.
Other trademarks are the property of the respective owners.
WA_DEV_W218_PTS_002
Rev 005
Page 3 of 109
Download from Www.Somanuals.com. All Manuals Search And Download.
Product Technical Specification &
Customer Design Guidelines
Contact Information
Phone:
1-604-232-1488
Sales Desk:
Hours:
8:00 AM to 5:00 PM Pacific Time
E-mail:
Sierra Wireless
13811 Wireless Way
Post:
Richmond, BC
Canada
V6V 3A4
Fax:
1-604-231-1109
Web:
Consult our website for up-to-date product descriptions, documentation, application notes, firmware
upgrades, troubleshooting tips, and press releases:
Document Update History
Rev
Date
List of Updates
001 April 22, 2009
002 April 28, 2009
Creation
Addition of Power Consumption table and software note in section 3.3.2
Document Cover/Footer: Updated the file name (from
WA_DEV_W218_PTS_002-002 to WA_DEV_W218_PTS_002-003), the
revision number and the revision date.
Throughout the document: adjusted figure size to better display components
and their corresponding values.
§ 1.1.1: Updated the 4th reference document name to Customer Process
Guideline for WISMO Series.
§ 3.5: Changed the section title to “SPI Bus for Debug Trace ONLY”.
§ 3.5.1:
Changed the SPI-CLK Pin number from 16 to 15
Added an additional sentence at the end of the paragraph text
003 July 17, 2009
§ 3.5.1.1: Changed the value of X101 from 3.6884MHz to 3,6864MHz.
§ 3.11.2: Changed the PWM1 Pin number from 27 to 35.
§ 3.12.3: Updated the section description.
§ 5.2.2: Changed the Recommended connection when not used column for
Pin 18, TX_CTRL from “2.8V TX Burst Indicator” to “not connected”.
§ 5.4: Updated the description for Class B condition.
§ 5.5.2:
Updated the section description
Deleted Figure 40: Recommended PCB landing pattern for WISMO218
WA_DEV_W218_PTS_002
Rev 005
Page 4 of 109
Download from Www.Somanuals.com. All Manuals Search And Download.
Product Technical Specification &
Customer Design Guidelines
Rev
Date
List of Updates
§ 5.5.3: Added this section.
Made grammatical and other punctuation corrections throughout the
document.
Updated links and references.
§ 3.8: Changed the number of General Purpose I/Os from 11 to 3.
§ 3.9.2 Added a Caution box after the table.
§ 3.10.4.1.1 and 3.104.1.2: Removed the GND within the WISMO218 in the
figures (figures 15, 16, 17 and 18)
§ 3.10.5.5: Added additional information in the Caution box regarding the ESD
sensitivity of the audio interface.
§ 5.2.2: Changed the recommended connection when not in use value from
“open” to “Ground” for pin #5, AUX-ADC0.
§ 3.10.5.5:
Separated the audio track figure and the differential connection figure
Labeled the differential connection figure as Figure 21
Added Figure 22: single-ended audio connection
§ 5.4: Updated the Class B temperature range from -30 to +75 to -40 to +85.
§ 5.5.3: Updated the figure to display it rotated 90 degrees counterclockwise.
Updated text wording, checked for spelling and grammar, updated links and
captions throughout the document.
§ 3.2.2: Updated the value of VBATT’s Ripple max.
§ 3.10.1.1: Updated table values.
§ 3.10.2.1.1: Updated table values.
§ 3.10.4.1.1: Deleted the description for Z2.
§ 3.13.3.1: Changed “de-assert” to “release” (re: recommendation for the
ON/~OFF signal)
§ 3.14: Updated reference to section 3.13.3.1.
§ 4.1.4: Updated Caution text.
§ 3.10.1: Updated the DC equivalent circuit.
§ 3.10.1.1: Updated the table values and notes section.
§ 3.10.4.1.1 and 3.10.4.1.2: Updated figures from 2.85V to 2.4V
§ 3.13.3.1: Updated figure and included the Tready table just beneath the
figure.
§ 3.17.3: Updated figure and updated descriptive text below the figure.
§ 3.13.3.1: Updated the figure to include ramp up time of VBAT.
Updated the Pin Description table (Table 7) of the Main Serial Link (UART)
subsection of section 3: Interfaces.
August 12, 2009
Added List of Figures and List of Tables.
Updated Figure 31.
September 10, 2009
WA_DEV_W218_PTS_002
Rev 005
Page 5 of 109
Download from Www.Somanuals.com. All Manuals Search And Download.
Product Technical Specification &
Customer Design Guidelines
Rev
Date
List of Updates
004 October 27, 2009
Updated documentation reference
collector switching transistor
via an open collector transistor
Set the low level pulse length to 5.5sec
005 November 23, 2009
WA_DEV_W218_PTS_002
Rev 005
Page 6 of 109
Download from Www.Somanuals.com. All Manuals Search And Download.
Product Technical Specification &
Customer Design Guidelines
Contents
LIST OF FIGURES .........................................................................................................12
LIST OF TABLES...........................................................................................................14
1. REFERENCES............................................................................................................16
2. GENERAL DESCRIPTION......................................................................................20
General Information.......................................................................................................................... 20
Functional Description..................................................................................................................... 22
Baseband Functionalities............................................................................................................ 23
3. INTERFACES............................................................................................................24
Power Supply Description........................................................................................................... 25
Pin Description............................................................................................................................. 26
Recommended Components............................................................................................................. 27
Various Operating Modes............................................................................................................ 28
Consumption Waveform Samples.............................................................................................. 30
Idle Mode Page 2 Current Waveform................................................................................................ 32
Idle Mode Page 9 Current Waveform................................................................................................ 32
Electrical Information for Digital I/O............................................................................................. 34
WA_DEV_W218_PTS_002
Rev 005
Page 7 of 109
Download from Www.Somanuals.com. All Manuals Search And Download.
Product Technical Specification &
Customer Design Guidelines
Pin Description............................................................................................................................. 35
Pin Description............................................................................................................................. 38
5-wire serial interface hardware design:........................................................................................... 39
4-wire serial interface hardware design:........................................................................................... 39
2-wire serial interface hardware design:........................................................................................... 39
Pin Description............................................................................................................................. 45
Pin Description............................................................................................................................. 47
Pin Description............................................................................................................................. 48
Pin Description............................................................................................................................. 51
Microphone......................................................................................................................................... 52
Recommended Components............................................................................................................. 53
Recommended Components............................................................................................................. 55
Design Recommendation............................................................................................................ 56
Recommended Filtering Components.............................................................................................. 57
Pin Description............................................................................................................................. 62
BUZZER Output................................................................................................................................. 64
Pin Description............................................................................................................................. 64
WA_DEV_W218_PTS_002
Rev 005
Page 8 of 109
Download from Www.Somanuals.com. All Manuals Search And Download.
Product Technical Specification &
Customer Design Guidelines
Pin Description............................................................................................................................. 67
Power ON............................................................................................................................................ 68
Pin Description............................................................................................................................. 71
Pin Description............................................................................................................................. 72
Pin Description............................................................................................................................. 73
Super Capacitor.................................................................................................................................. 74
Pin Description............................................................................................................................. 77
Reset.................................................................................................................................................... 78
Pin Description............................................................................................................................. 78
RF Interface........................................................................................................................................ 80
WISMO218 Configuration............................................................................................................ 87
WA_DEV_W218_PTS_002
Rev 005
Page 9 of 109
Download from Www.Somanuals.com. All Manuals Search And Download.
Product Technical Specification &
Customer Design Guidelines
Template............................................................................................................................................. 89
5. TECHNICAL SPECIFICATIONS...........................................................................90
PCB Specification for Application Board..................................................................................... 94
Environmental Specifications......................................................................................................... 95
Function Status Classification.................................................................................................... 95
WISMO218 Dimensions............................................................................................................... 98
SIM Card Reader............................................................................................................................. 101
GSM Antenna................................................................................................................................... 102
7. NOISES AND DESIGN..........................................................................................103
8. APPENDIX...............................................................................................................104
RF Safety..................................................................................................................................... 107
Children............................................................................................................................................. 109
WA_DEV_W218_PTS_002
Rev 005
Page 10 of 109
Download from Www.Somanuals.com. All Manuals Search And Download.
Product Technical Specification &
Customer Design Guidelines
WA_DEV_W218_PTS_002
Rev 005
Page 11 of 109
Download from Www.Somanuals.com. All Manuals Search And Download.
Product Technical Specification &
Customer Design Guidelines
List of Figures
Functional Architecture.......................................................................................................22
Reject Filter Diagram...........................................................................................................26
DC and AC Equivalent Circuits of MIC...............................................................................49
Example of MIC Input Differential Connection with LC Filter..........................................52
Example of MIC Input Single-Ended connection with LC Filter.......................................54
Example of Speaker Single-Ended Connection.................................................................56
Example of a LED Driven by the PWM0 or PWM1 Output................................................63
WA_DEV_W218_PTS_002
Rev 005
Page 12 of 109
Download from Www.Somanuals.com. All Manuals Search And Download.
Product Technical Specification &
Customer Design Guidelines
RTC Supplied by a Rechargeable Battery Cell..................................................................75
Example of an RF 50 line...................................................................................................81
WISMO218 Pin Configuration.............................................................................................90
PCB Structure Example for the Application Board...........................................................94
Environmental classes.........................................................................................................96
WA_DEV_W218_PTS_002
Rev 005
Page 13 of 109
Download from Www.Somanuals.com. All Manuals Search And Download.
Product Technical Specification &
Customer Design Guidelines
List of Tables
Consumption/Software Driver Recommendations...........................................................33
GPIO Pin Descriptions.........................................................................................................47
BUZZER Electrical Characteristics.....................................................................................64
Electrical Characteristics of the ON/~OFF Signal............................................................67
ON/~OFF Signal Pin Descriptions.....................................................................................67
Electrical Characteristics of the Signal..............................................................................71
Electrical Characteristics of the Signal..............................................................................73
BAT-RTC Pin Descriptions..................................................................................................73
WA_DEV_W218_PTS_002
Rev 005
Page 14 of 109
Download from Www.Somanuals.com. All Manuals Search And Download.
Product Technical Specification &
Customer Design Guidelines
Electrical Characteristics of the Signal..............................................................................76
Reset Commands.................................................................................................................79
WA_DEV_W218_PTS_002
Rev 005
Page 15 of 109
Download from Www.Somanuals.com. All Manuals Search And Download.
Product Technical Specification &
Customer Design Guidelines
1. References
Reference Documents
Several documents are referenced throughout this specification. For more details, please consult the
listed reference documents. The Sierra Wireless documents referenced herein are provided in the
Sierra Wireless documentation package; however, the general reference documents which are not
Sierra Wireless owned are not provided in the documentation package.
Sierra Wireless Reference Documentation
[1]
[2]
[3]
[4]
WISMO218 Hardware Presentation
Reference: WA_DEV_W218_PTS_001
WISMO218 AT Commands Manual
Reference: WA_DEV_W218_UGD_003
WISMO218 Development Kit User Guide
Reference: WA_DEV_W218_UGD_004
Customer Process Guideline for WISMO Series
Reference: WA_DEV_WISMO_PTS_001
List of Abbreviations
Abbreviation
Definition
AC
Alternative Current
ADC
A/D
Analog to Digital Converter
Analog to Digital conversion
Audio-Frequency
AF
AGC
AT
Automatic Gain Control
ATtention (prefix for modem commands)
AUX
CAN
CB
AUXiliary
Controller Area Network
Cell Broadcast
CBS
CE
Cell Broadcast Service
-
CEP
CLK
CMOS
Circular Error Probable
CLocK
Complementary Metal Oxide Semiconductor
WA_DEV_W218_PTS_002
Rev 005
Page 16 of 109
Download from Www.Somanuals.com. All Manuals Search And Download.
Product Technical Specification &
Customer Design Guidelines
Abbreviation
CODEC
Definition
COder DECoder
CPU
CS
Central Processing Unit
Coding Scheme
CSD
CTS
DAC
DAI
Circuit Switched Data
Clear To Send
Digital to Analog Converter
Digital Audio Interface
Decibel
dB
DC
Direct Current
DCD
DCE
DCS
DR
Data Carrier Detect
Data Communication Equipment
Digital Cellular System
Dynamic Range
DSR
DTE
DTR
EFR
E-GSM
EMC
EMI
Data Set Ready
Data Terminal Equipment
Data Terminal Ready
Enhanced Full Rate
Extended GSM
ElectroMagnetic Compatibility
ElectroMagnetic Interference
Enhanced Message Service
ENable
EMS
EN
ESD
ETSI
FIFO
FR
ElectroStatic Discharges
European Telecommunications Standards Institute
First In First Out
Full Rate
FTA
GND
GPI
Full Type Approval
GrouND
General Purpose Input
General Purpose Connector
General Purpose Input Output
General Purpose Output
General Packet Radio Service
Global Positioning System
General Purpose Serial Interface
Global System for Mobile communications
Half Rate
GPC
GPIO
GPO
GPRS
GPS
GPSI
GSM
HR
Hi Z
IC
High impedance (Z)
Integrated Circuit
IDE
Integrated Development Environment
WA_DEV_W218_PTS_002
Rev 005
Page 17 of 109
Download from Www.Somanuals.com. All Manuals Search And Download.
Product Technical Specification &
Customer Design Guidelines
Abbreviation
Definition
IF
Intermediate Frequency
IMEI
I/O
International Mobile Equipment Identification
Input / Output
LCD
LED
LNA
LSB
MAX
MIC
MIN
MMS
MO
Liquid Crystal Display
Light Emitting Diode
Low Noise Amplifier
Less Significant Bit
MAXimum
MICrophone
MINimum
Multimedia Message Service
Mobile Originated
MS
Mobile Station
MT
Mobile Terminated
Not Applicable
na
NF
Noise Factor
NMEA
NOM
NTC
PA
National Marine Electronics Association
NOMinal
Negative Temperature Coefficient
Power Amplifier
Pa
Pascal (for speaker sound pressure measurements)
Packet Broadcast Control CHannel
Personal Computer
PBCCH
PC
PCB
PCL
PCM
PDA
PFM
PLL
PSM
PWM
RAM
RF
Printed Circuit Board
Power Control Level
Pulse Code Modulation
Personal Digital Assistant
Power Frequency Modulation
Phase Lock Loop
Phase Shift Modulation
Pulse Width Modulation
Random Access Memory
Radio Frequency
RFI
Radio Frequency Interference
Right Hand Circular Polarization
Ring Indicator
RHCP
RI
RMS
RST
RTC
RTCM
Root Mean Square
ReSeT
Real Time Clock
Radio Technical Commission for Maritime services
WA_DEV_W218_PTS_002
Rev 005
Page 18 of 109
Download from Www.Somanuals.com. All Manuals Search And Download.
Product Technical Specification &
Customer Design Guidelines
Abbreviation
RTS
Definition
Request To Send
RX
Receive
SCL
SDA
SIM
Serial CLock
Serial DAta
Subscriber Identification Module
Surface Mounted Device/Design
Short Message Service
Serial Peripheral Interface
Sound Pressure Level
SPeaKer
SMD
SMS
SPI
SPL
SPK
SW
SoftWare
PSRAM
TBC
TDMA
TP
Pseudo Static RAM
To Be Confirmed
Time Division Multiple Access
Test Point
TU
Typical Urban fading profile
TUHigh
TVS
TX
Typical Urban, High speed fading profile
Transient Voltage Suppressor
Transmit
TYP
UART
UBX
USB
USSD
VSWR
WAP
TYPical
Universal Asynchronous Receiver-Transmitter
µ-blox proprietary protocol (NE DOIT PAS APPARAITRE)
Universal Serial Bus
Unstructured Supplementary Services Data
Voltage Standing Wave Ratio
Wireless Application Protocol
WA_DEV_W218_PTS_002
Rev 005
Page 19 of 109
Download from Www.Somanuals.com. All Manuals Search And Download.
Product Technical Specification &
Customer Design Guidelines
2. General Description
General Information
The WISMO218 WIreless Standard MOdem is a self-contained EGSM/GPRS 900/1800 dual-band
module that was specifically designed for M2M systems deployed in Europe and Asia.
Overall Dimensions
Length: 25.0 mm
Width: 25.0 mm
Thickness: 2.8 mm (excluding label thickness)
Weight: 3.8 g
Environment and Mechanics
Green policy: Restriction of Hazardous Substances in Electrical and Electronic Equipment
(RoHS) compliant
Complete shielding
The WISMO218 is compliant with RoHS Directive 2002/95/EC which sets limits for the use of certain
restricted hazardous substances. This directive states that “from 1st July 2006, new electrical and
electronic equipment put on the market does not contain lead, mercury, cadmium, hexavalent
chromium, polybrominated biphenyls (PBB) or polybrominated diphenyl ethers (PBDE)”.
GSM/GPRS Features
2 Watts EGSM 900 radio section running under 3.6 Volts
1 Watt GSM1800 radio section running under 3.6 Volts
Hardware GPRS class 10 capable
Interfaces
VBAT power supply
Digital section running under 2.8 Volts
3V/1V8 SIM interface
Power supplies
Serial link (UART)
Analog audio
ADC
WA_DEV_W218_PTS_002
Rev 005
Page 20 of 109
Download from Www.Somanuals.com. All Manuals Search And Download.
Product Technical Specification &
Customer Design Guidelines
Serial bus SPI for debug trace
PWM0,1 and PWM2 for buzzer output
GPIOs
ON/~OFF
TX burst indicator
Module ready indicator
Reset
Firmware
Drives the WISMO218 via an AT command interface over a serial port
Full GSM/GPRS Operating System stack
Real Time Clock with calendar
Connection Interfaces
The WISMO218 has a 46-pin castellation form factor which provides:
One ANT pin for RF in/out
Other pins for baseband signals
WA_DEV_W218_PTS_002
Rev 005
Page 21 of 109
Download from Www.Somanuals.com. All Manuals Search And Download.
Product Technical Specification &
Customer Design Guidelines
Functional Description
The global architecture of the WISMO218 is shown below:
WISMO218
Analog Interfaces
Radio
DSP
GSM / GPRS
AUDIO
core
ADCs
Digital Interfaces
UART
Control &
Power
SPI / I2C
GPIOs
SIM
power
ARM
supplys
core
BUZZER
PWMs
reset
32768
RTC
kHz
Memory
Address
Data
Control
Figure 1. Functional Architecture
RF Functionalities
The Radio Frequency (RF) range complies with the Phase II EGSM 900/DCS 1800 recommendation.
The frequency range for the transmit band and receive band are listed in the table below.
Transmit Band (Tx)
Receive Band (Rx)
E-GSM 900
DCS 1800
880 to 915 MHz
1710 to 1785 MHz
925 to 960 MHz
1805 to 1880 MHz
The RF part of the WISMO218 is based on a specific dual band chip which includes:
a Digital low-IF receiver
WA_DEV_W218_PTS_002
Rev 005
Page 22 of 109
Download from Www.Somanuals.com. All Manuals Search And Download.
Product Technical Specification &
Customer Design Guidelines
a dual-band LNAs (Low Noise Amplifier)
an Offset PLL (Phase Locked Loop) transmitter
a Frequency synthesizer
a Digitally controlled crystal oscillator (DCXO)
a Tx/Rx FEM (Front-End Module ) for dual-band GSM/GPRS
Baseband Functionalities
The Baseband is composed of an ARM9, a DSP and an analog element (with audio signals, I/Q signals
and ADC).
The core power supply is 1.2V and the digital power supply is 2.8V.
WA_DEV_W218_PTS_002
Rev 005
Page 23 of 109
Download from Www.Somanuals.com. All Manuals Search And Download.
Product Technical Specification &
Customer Design Guidelines
3. Interfaces
General Interfaces
The WIreless Standard MOdem, WISMO218, has a 46-pin castellation connection, which provides
access to all available interfaces.
The available interfaces are listed in the table below.
Subsection Name
Driven by AT Commands
Serial Interface (SPI)
Main Serial Link
No
Yes
Yes
Yes
No (*)
No (*)
Yes
Yes
No
SIM Interface
General Purpose IO
Analog to Digital Converter
Analog Audio Interface
PWMs
PWM2 for Buzzer Output
ON/~OFF
Module Ready Indication
No
VBAT_RTC (Backup Battery)
TX Burst Indication Signal
Reset
No
No
No
(*)
These interfaces will have AT command support in future versions.
WA_DEV_W218_PTS_002
Rev 005
Download from Www.Somanuals.com. All Manuals Search And Download.
Page 24 of 109
Product Technical Specification &
Customer Design Guidelines
Power Supply
Power Supply Description
The power supply is one of the key elements in the design of a GSM terminal.
Due to the burst emission in GSM/GPRS, the power supply must be able to deliver high current peaks
in a short time. During the peaks, the ripple (Uripple) on the supply voltage must not exceed a certain
limit (see Table 1 below).
Listed below are the corresponding radio burst rates for the different GPRS classes in communication
mode.
A GSM/GPRS class 2 terminal emits 577µs radio bursts every 4.615ms. (See Figure 2 Power
Supply During Burst Emission below.)
VBATT
Uripp
Uripp
t = 577 µs
T = 4,615 ms
Figure 2. Power Supply During Burst Emission
A GPRS class 10 terminal emits 1154µs radio bursts every 4.615ms.
VBATT provides for the following functions:
Directly supplies the RF components with 3.6V. It is essential to keep a minimum voltage
ripple at this connection in order to avoid any phase error.
The peak current (1.4A peak in GSM /GPRS mode) flows with a ratio of:
.
.
1/8 of the time (around 577µs every 4.615ms for GSM /GPRS cl. 2)
and
1/4 of the time (around 1154µs every 4.615ms for GSM /GPRS cl. 10)
with the rising time at around 10µs.
Internally used to provide, via several regulators, the supply required for the baseband
signals.
WA_DEV_W218_PTS_002
Rev 005
Page 25 of 109
Download from Www.Somanuals.com. All Manuals Search And Download.
Product Technical Specification &
Customer Design Guidelines
Electrical Characteristics
Table 1.
Input Power Supply Voltage
VMIN
VNOM
VMAX
ITYP.
IMAX
Ripple max (Uripp)
10kHz to 100kHz: less
than100mVpp
VBATT
3.2(1)
3.6
4.8
1.35A
1.4A
greater than 100kHz: less
than 10mVpp
(1):
(2):
This value has to be guaranteed during the burst (with 1.4A Peak in GSM or GPRS mode)
Maximum operating Voltage Stationary Wave Ratio (VSWR) 1.5:1
When powering the WISMO218 with a battery, the total impedance (battery + protections + PCB)
should be less than 150m.
Pin Description
Table 2.
Power Supply Pin Descriptions
Signal
Pin Number(s)
VBATT
GND
29,30
20,22,23,26,28,31
Application
The reject filter can be connected between VBATT and the supply sources if the supply source is
noisy.
Caution: If the reject filter (C1+L1+C2) is an option, a capacitor (i.e. C2) is mandatory close to the VBATT.
Filter
WISMO218
L1
VBATT
Supply source
C1
C2
Figure 3. Reject Filter Diagram
WA_DEV_W218_PTS_002
Rev 005
Download from Www.Somanuals.com. All Manuals Search And Download.
Page 26 of 109
Product Technical Specification &
Customer Design Guidelines
Recommended Components
C1, C2:
10µF +/-20%
Component
Manufacturer
GRM21BR60J106KE19L
CM21X5R106M06AT
JMK212BJ106MG-T
C2012X5R0J106MT
MURATA
KYOCERA
TAYO YUDEN
TDK
L1:
220nH +/-5%
Component
Manufacturer
0805CS-221XJLC
0805G221J E
COILCRAFT
STETCO
WA_DEV_W218_PTS_002
Rev 005
Download from Www.Somanuals.com. All Manuals Search And Download.
Page 27 of 109
Product Technical Specification &
Customer Design Guidelines
Power Consumption
Various Operating Modes
There are various kinds of operating modes for the WISMO218 as defined in the table below.
Table 3.
WISMO218 Operating Modes
Mode
OFF Mode
Description
When VBATT power is supplied to the WISMO218 but has not yet been powered ON.
When alarm clock is set for the WISMO218 with ALL of the following conditions:
before time is up
Alarm Mode
with AT + CPOF having been entered from a computer that is connected to the
WISMO218
with the ON/~OFF signal being left open (remains at HIGH level)
When the WISMO218 has a location update with a live network but with no GSM/GPRS
Idle Mode
Connected Mode
Transfer Mode
Note 1
The WISMO218 has GSM voice codec connection with a live network.
The WISMO218 has GPRS data transfer connection with a live network.
:
There are two different methods to enter sleep mode through the AT command setting, AT + PSSLEEP, as
described below:
AT + PSSLEEP = 0
.
.
The entry of sleep mode is controlled by the level of DTR signal and the firmware.
When DTR (viewed from module side) is of LOW voltage level, the WISMO218 will
never enter sleep mode.
.
When DTR (viewed from module side) is of HIGH voltage level, the WISMO218 will
enter sleep mode. To wake the WISMO218 up, it is necessary to toggle the DTR (viewed
from module side) from HIGH to LOW voltage level.
.
This method should be applied if the application needs to forbid the entry of sleep mode.
AT + PSSLEEP = 1
.
For this method, the entry of sleep mode is controlled just by the firmware.
.
When the WISMO218 has had no activities for a certain period of time, it will enter sleep
mode automatically, regardless of the DTR level.
.
Any ASCII character on the UART can wake the WISMO218 up.
For details of the AT + PSSLEEP command, please refer to document [2] WISMO218 AT Commands
Note that the power consumption level will vary depending on the operating mode used.
WA_DEV_W218_PTS_002
Rev 005
Page 28 of 109
Download from Www.Somanuals.com. All Manuals Search And Download.
Product Technical Specification &
Customer Design Guidelines
Power Consumption
The power consumption level will vary depending on the operating mode, and it is for this reason
that the following consumption values are given for each mode and RF band.
The following consumption values were obtained by performing measurements on WISMO218
samples at a temperature of 25° C.
Note:
Note:
All of the following information given assumes a 50 RF output.
Power consumption performance is software related. The results listed below are based on the
software version L02_00gg.WISMO218.
WISMO218 Power consumption
IMIN
average
INOM
average
IMAX
average
IMAX
peak
Operating mode
Parameters
Unit
VBATT=4.8V VBATT=3.6V VBATT=3.2V
Off Mode*
44
44
36
36
34
34
--
µA
Alarm Mode
µA
mA
mA
mA
mA
mA
mA
mA
mA
mA
mA
mA
mA
mA
mA
Paging 2 (Rx burst occurrence ~0.5s)
Paging 9 (Rx burst occurrence ~2s)
1.9
1.2
211
79
2.0
1.3
214
82
2.1
1.3
217
84
570
Idle Mode**
570
PCL5 (TX power 33dBm)
900 MHz
1400 TX
220 TX
950 TX
200 TX
1400 TX
220 TX
950 TX
200 TX
1450 TX
240 TX
970 TX
220 TX
PCL19 (TX power 5dBm)
Connected Mode
PCL0 (TX power 30dBm)
1800MHz
160
77
163
80
164
81
PCL15 (TX power 0dBm)
Gam.3 (TX power 33dBm)
900 MHz
201
73
203
77
206
78
Transfer
Mode
class 8
Gam.17 (TX power 5dBm)
Gam.3 (TX power 30dBm)
1800 MHz
151
71
154
75
155
76
(4Rx/1Tx)
Gam.18 (TX power 0dBm)
GPRS
Gam.3 (TX power 33dBm)
900 MHz
366
107
263
103
369
111
267
106
373
113
268
108
Transfer
Mode
class 10
Gam.17 (TX power 5dBm)
Gam.3 (TX power 30dBm)
1800 MHz
(3Rx/2Tx)
Gam.18 (TX power 0dBm)
*
Current consumption in OFF mode is measured with BAT-RTC being left open.
Idle Mode consumption depends on the SIM card used. Some SIM cards respond faster than others, in which
**
case the longer the response time is, the higher the consumption is.
WA_DEV_W218_PTS_002
Rev 005
Page 29 of 109
Download from Www.Somanuals.com. All Manuals Search And Download.
Product Technical Specification &
Customer Design Guidelines
TX means that the current peak is the RF transmission burst (Tx burst).
RX means that the current peak is the RF reception burst (Rx burst), in GSM mode only (worst case).
Three VBATT values are used to measure the power consumption - VBATTmin (3.2V), VBATTmax
(4.8V) and VBATTtyp (3.6V).
The average current is given for the three VBATT values and the peak current given is the maximum
current peak measured with the three VBATT voltages.
For more information about the consumption measurement procedure, refer to Section 4
Consumption Waveform Samples
The consumption waveforms presented below are for an EGSM900 network configuration.
The typical VBATT voltage is 3.6V.
Four significant operating mode consumption waveforms are shown in the following subsections,
namely:
Connected Mode (PCL5: Tx power 33dBm)
Transfer mode (GPRS class 10, gam.3: Tx power 33dBm )
Idle mode (Paging 2)
Idle mode (Paging 9)
Note that the following diagrams only show the waveform of the current, but not the exact values.
WA_DEV_W218_PTS_002
Rev 005
Page 30 of 109
Download from Www.Somanuals.com. All Manuals Search And Download.
Product Technical Specification &
Customer Design Guidelines
Recommendations for Less Consumption
For better power consumption, in particular for the quiescent current, it is recommended to drive the
GPIOs as shown in the table below.
Table 4.
Consumption/Software Driver Recommendations
Pin
Number
SW Driver Recommended (Output
State)
Signal
GPIO1
I/O
I/O Type
Reset State
24
I/O
I/O
2V8
2V8
Pull up
Pull up
1 logic level
1 logic level
GPIO3
GPIO5
16
19
Input: 0 logic level
Output: 1logic level
I/O
2V8
Z**
GPIO2 is dedicated for WISMO_READY and is not open as GPIO purpose for customer use.
GPIO4 is dedicated for TX burst indication and is not open as GPIO purpose for customer use.
** When GPIO5 is used as a general purpose output, it is necessary to have an external pull up resistor connecting to a
2.8V source. Resistance value depends on the current drain required by the application side.
WA_DEV_W218_PTS_002
Rev 005
Page 33 of 109
Download from Www.Somanuals.com. All Manuals Search And Download.
Product Technical Specification &
Customer Design Guidelines
Electrical Information for Digital I/O
The I/Os concerned are all interfaces such as GPIOs, SPIs, etc.
Table 5.
Electrical Characteristics of Digital I/O
2.8 Volts Type (2V8 )
Parameter
I/O type
VCC_2V8
Minim.
2.7V
Typ
Maxim.
2.95V
Condition
Internal 2.8V power supply
2.8V
-
VIL
CMOS
CMOS
CMOS
-0.4V*
2.4V
0.4V
VCC_2V8 +
0.4V
VIH
-
Input / Output pin
VOL
-
-
-
-
0.1V
2.7V
2.4V
-
-
VOH
CMOS
IOH = 4mA
*
Absolute maximum ratings
WA_DEV_W218_PTS_002
Rev 005
Download from Www.Somanuals.com. All Manuals Search And Download.
Page 34 of 109
Product Technical Specification &
Customer Design Guidelines
SPI Bus for Debug Trace ONLY
The WISMO218 provides one SPI bus through the castellation pin.
Pin Description
Table 6.
SPI Bus Pin Descriptions
Pin
Number
Signal
SPI-CLK
I/O
I/O Type
Reset State
Description
SPI Serial Clock
15
O
2V8
2V8
2V8
2V8
2V8
Pull down
Pull down
Pull down
Pull up
SPI-IO
13
14
17
25
I/O
O
O
I
SPI Serial input/output
SPI Serial input
SPI Enable
SPI-O
~SPI-CS
SPI-IRQ
Pull down
SPI Interrupt
By default, the WISMO218 SPI interface is only used for monitoring trace for debug purposes. An
SPI-to-UART2 conversion circuit is required to convert the SPI trace to UART2. Also, the SPI-IRQ (pin
25) is required for interrupt. Again, note that the SPI interface of the WISMO218 is not open for
application use other than debug trace.
SPI Waveforms
Figure 4. SPI Timing Diagrams
WA_DEV_W218_PTS_002
Rev 005
Page 35 of 109
Download from Www.Somanuals.com. All Manuals Search And Download.
Product Technical Specification &
Customer Design Guidelines
Figure 5. Example of an SPI to UART2 Interface Conversion Implementation
The following table lists the recommended components to use in implementing the SPI to UART2
interface.
Component
U103
Description/Details
Manufacturer
SC16IS750IPW
NXP Semiconductors
Farnell
X101
3, 6864MHz 86SMX surface mount crystal (971-3131)
R104, R105
R106
10K
1K
C105
22pF
33pF
100nF
C106
C107
After converting the SPI signal to a UART signal, a UART transceiver circuitry is needed to
communicate this UART signal to DTE.
WA_DEV_W218_PTS_002
Rev 005
Page 36 of 109
Download from Www.Somanuals.com. All Manuals Search And Download.
Product Technical Specification &
Customer Design Guidelines
Figure 6. Example of RS-232 Level Shifter Implementation for UART2
The following table lists the recommended components to use in implementing a UART transceiver
circuitry.
Component
U200
Description/Details
Manufacturer
LTC2804IGN-1
LINEAR TECHNOLOGY
MURATA
L200
J200
R202
R204
C200
C201
C207
C208
LQH2M CN100K02L
096615276119 SUBD9F
HARTING
NC
100K
1µF
220nF
1µF
1µF
Note:
It is recommended to make SPI signals accessible for diagnostics by reserving some test points, for
example.
WA_DEV_W218_PTS_002
Rev 005
Page 37 of 109
Download from Www.Somanuals.com. All Manuals Search And Download.
Product Technical Specification &
Customer Design Guidelines
Main Serial Link (UART)
A flexible 8-wire serial interface is available on the WISMO218 that complies with the V24 protocol
signaling, but not with the V28 (electrical interface) due to its 2.8-Volt interface.
Features
The supported baud rates of the UART are 1200, 2400, 4800, 9600, 19200, 38400, 57600 and 115200
Kbits, with autobauding.
The signals used by the UART are as follows:
TX data (CT103/TXD)
RX data (CT104/RXD)
Request To Send (~CT105/RTS)
Clear To Send (~CT106/CTS)
Data Terminal Ready (~CT108/DTR)
Data Set Ready (~CT107/DSR)
Data Carrier Detect (~CT109/DCD)
Ring Indicator (~CT125/RI)
Pin Description
Table 7.
Main Serial Link Pin Descriptions
I/O
Type
Reset
State
Signal
Pin Number
I/O
Description
Transmit serial data
CT103/TXD*
CT104/RXD*
~CT105/RTS*
~CT106/CTS*
~CT107/DSR*
~CT108/DTR*
~CT109/DCD*
~CT125/RI *
GND*
38
40
39
41
42
44
43
45
I
2V8
1
1
0
0
1
1
1
1
O
I
2V8
2V8
2V8
2V8
2V8
2V8
2V8
GND
Receive serial data
Request To Send
Clear To Send
O
O
I
Data Set Ready
Data Terminal Ready
Data Carrier Detect
Ring Indicator
O
O
Ground
*
According to PC (DTE) view
The rising time and falling time of the reception signals (mainly CT103/TXD) have to be less than
300ns.
Tip:
The WISMO218 is designed to operate using all the serial interface signals. In particular, it is
recommended to use ~CT105/RTS and ~CT106/CTS for hardware flow control in order to avoid data
corruption during transmissions.
WA_DEV_W218_PTS_002
Rev 005
Page 38 of 109
Download from Www.Somanuals.com. All Manuals Search And Download.
Product Technical Specification &
Customer Design Guidelines
5-wire serial interface hardware design:
Signal: CT103/TXD*, CT104/RXD*, ~CT105/RTS*, ~CT106/CTS*
The signal ~CT108/DTR* must be managed following the V24 protocol signaling if we want to
use idle mode.
For detailed configuration, please refer to Figure 10 Example of V24/CMOS Serial Link
4-wire serial interface hardware design:
Signal: CT103/TXD*, CT104/RXD*, ~CT105/RTS*, ~CT106/CTS*
The signal ~CT108/DTR* can be looped back to ~CT107/DSR from both the WISMO218 side
and from the DTE side.
For detailed configuration, please refer to Figure 9 Example of V24/CMOS Serial Link
2-wire serial interface hardware design:
This case is possible for a connected external chip, but it is not recommended.
The flow control mechanism has to be managed from the customer side.
Signal: CT103/TXD*, CT104/RXD*
The signal ~CT108/DTR* can be looped back to ~CT107/DSR from both the WISMO218 side
and from the DTE side.
The signals ~CT105/RTS*, ~CT106/CTS* are not used, please configure using the AT
The signal ~CT105/RTS* can be looped back to ~CT106/CTS* from both the WISMO218 side
and from the DTE side.
For detailed configuration, please refer to Figure 8 Example of V24/CMOS Serial Link
Note:
The loop back connection of ~CT108/DTR* to ~CT107/DSR is not allowed when the case
AT+PSSLEEP=0 is used, for which sleep mode entry is ~CT108/DTR* level dependent. (Refer to
configuration, AT+PSSLEEP=1 should be used instead. For details, please refer to document [2]
*
According to PC (DTE) view
WA_DEV_W218_PTS_002
Rev 005
Page 39 of 109
Download from Www.Somanuals.com. All Manuals Search And Download.
Product Technical Specification &
Customer Design Guidelines
Application
The level shifter must be a V28 electrical signal compliant with 2.8V.
Figure 7. Example of RS-232 Level Shifter Implementation for UART
Note that the U1 chip also protects the WISMO218 against ESD (Air Discharge) at 15KV.
Table 8.
Recommended Components
Component
R1, R2
Description/Details
Manufacturer
15K
1µF
C1, C2, C3, C4, C5
C6
C7
U1
J1
100nF
6.8uF TANTAL 10V CP32136
ADM3307EACP
AVX
ANALOG DEVICES
SUB-D9 female
R1 and R2 are necessary only during Reset state to force the ~CT125/RI and ~CT109/DCD signals to
HIGH level.
The ADM3307EACP can be powered by the VCC_2V8 (pin 46) of the WISMO218 or by an external
regulator at 2.8V.
If the UART interface is connected directly to a host processor, it is not necessary to use level shifters.
The interface can be connected as shown in the figure(s) below:
WA_DEV_W218_PTS_002
Rev 005
Page 40 of 109
Download from Www.Somanuals.com. All Manuals Search And Download.
Product Technical Specification &
Customer Design Guidelines
V24/CMOS possible design
ON/~OFF
37
Customer application
( DTE )
CT103/TXD
CT104/RXD
38
Tx
WISMO218
( DCE )
40
39
41
Rx
~CT105/RTS
RTS
CTS
~CT106/CTS
~CT107/DSR
~CT108/DTR
42
44
43
DSR
DTR
DCD
~CT109/DCD
~CT125/RI
45
RI
GND
GND
Figure 8. Example of V24/CMOS Serial Link Implementation for 2-wire UART
ON/~OFF
37
Customer application
( DTE )
CT103/TXD
CT104/RXD
38
40
39
41
Tx
WISMO218
( DCE )
Rx
~CT105/RTS
~CT106/CTS
RTS
CTS
~CT107/DSR
~CT108/DTR
42
44
43
DSR
DTR
DCD
~CT109/DCD
~CT125/RI
45
RI
GND
GND
Figure 9. Example of V24/CMOS Serial Link Implementation for 4-wire UART
WA_DEV_W218_PTS_002
Rev 005
Page 41 of 109
Download from Www.Somanuals.com. All Manuals Search And Download.
Product Technical Specification &
Customer Design Guidelines
ON/~OFF
37
Customer application
( DTE )
CT103/TXD
CT104/RXD
38
Tx
WISMO218
( DCE )
40
39
41
Rx
~CT105/RTS
~CT106/CTS
RTS
CTS
~CT107/DSR
~CT108/DTR
42
44
43
DSR
DTR
DCD
~CT109/DCD
~CT125/RI
45
RI
GND
GND
Figure 10. Example of V24/CMOS Serial Link Implementation for 5-wire UART
The designs shown in Figure 8, Figure 9, and Figure 10 are basic designs. Both the DCD and RI can be
left open when not used.
However, a more flexible design to access this serial link with all modem signals is shown below.
ON/~OFF
WISMO218
37
( DCE )
Customer application
2.8Volt
( DTE )
2x 10K
~CT109/DCD
~CT125/RI
43
45
DCD
RI
CT103/TXD
CT104/RXD
~CT105/RTS
~CT106/CTS
~CT107/DSR
~CT108/DTR
38
40
39
41
42
44
Tx
Rx
RTS
CTS
DSR
DTR
GND
GND
GND
Figure 11. Example of Full Modem V24/CMOS Serial Link Implementation for full-UART
There is an internal 10K pull-up resistor on RI and DCD to set it to HIGH level during the reset
state.
The UART interface is a 2.8V type, but is 3V tolerant.
WA_DEV_W218_PTS_002
Rev 005
Page 42 of 109
Download from Www.Somanuals.com. All Manuals Search And Download.
Product Technical Specification &
Customer Design Guidelines
Tip:
The WISMO218 UART is designed to operate using all the serial interface signals. In particular, it is
recommended to use ~CT105/RTS and ~CT106/CTS for hardware flow control in order to avoid data
corruption during transmission.
WA_DEV_W218_PTS_002
Rev 005
Page 43 of 109
Download from Www.Somanuals.com. All Manuals Search And Download.
Product Technical Specification &
Customer Design Guidelines
SIM Interface
The Subscriber Identification Module can be directly connected to the WISMO218 through this
dedicated interface.
Features
The SIM interface controls both 1.8V and 3V SIM cards.
It is recommended to add Transient Voltage Suppressor diodes (TVS) on the signal connected to the
SIM socket in order to prevent any Electrostatic Discharge.
TVS diodes with low capacitance (less than 10pF) have to be connected on SIM-CLK and SIM-IO
signals to avoid any disturbance from the rising and falling edge.
These types of diodes are mandatory for the Full Type Approval. They will be placed as close as
possible to the SIM socket.
The recommended low capacitance diode array to use is the DALC208SC6 from ST Microelectronics.
The SIM uses four (4) signals, namely:
SIM-VCC: SIM power supply
~SIM-RST: reset
SIM-CLK: clock
SIM-IO: I/O port
The SIM interface controls a 3V/1V8 SIM. This interface is fully compliant with the GSM 11.11
recommendations concerning SIM functions.
WA_DEV_W218_PTS_002
Rev 005
Page 44 of 109
Download from Www.Somanuals.com. All Manuals Search And Download.
Product Technical Specification &
Customer Design Guidelines
Table 9.
Electrical Characteristics of SIM Interface
Parameter
SIM-IO VIH
Conditions
Minim.
Typ
Maxim.
Unit
0.7xVSIM
-
-
-
V
V
IIH = ± 20µA
SIM-IO VIL
IIL = 1mA
-
-
-
0.4
~SIM-RST, SIM-CLK
VOH
Source current = 20µA
Source current = 20µA
0.9xVSIM
0.8xVSIM
-
-
V
V
SIM-IO VOH
~SIM-RST, SIM-IO, SIM-
CLK
Sink current =
-200µA
-
-
0.4
3.0
V
V
VOL
SIM-VCC = 2.9V
2.75
2.9
SIM-VCC Output Voltage
SIM-VCC = 1.8V
full-power mode
1.65
-
1.8
-
1.95
20
V
mA
SIM-VCC current
Sleep mode with 32kHz system
clock enabled.
-
-
-
3
mA
ns
Loaded with 30pF and ESD
protection diode
SIM-CLK Rise/Fall Time
~SIM-RST, Rise/Fall Time
25
50
Loaded with 30pF and ESD
protection diode
-
45
-
ns
Loaded with 30pF and ESD
protection diode
SIM-IO Rise/Fall Time
SIM-CLK Frequency
-
-
0.2
-
1
µs
Loaded with 30pF
3.25
MHz
Pin Description
Table 10. SIM Interface Pin Description
Pin
Signal
Reset
I/O Type
Multiplexed
with
I/O
Description
Number
State
SIM-CLK
~SIM-RST
SIM-IO
9
O
2V9 / 1V8
2V9 / 1V8
2V9 / 1V8
2V9 / 1V8
0
SIM Clock
Not mux
Not mux
Not mux
Not mux
11
10
8
O
0
SIM Reset
I/O
O
Pull up
SIM Data
SIM-VCC
SIM Power Supply
WA_DEV_W218_PTS_002
Rev 005
Page 45 of 109
Download from Www.Somanuals.com. All Manuals Search And Download.
Product Technical Specification &
Customer Design Guidelines
Application
Figure 12. Example of SIM Socket Implementation
Table 11. Recommended Components
Component
Description/Details
Manufacturer
C400
D400
D401
100nF
ESDA6V1SC6
DALC208SC6
ST
SGS-THOMSON
ITT CANNON CCM03 series
J400
CANNON
SIM socket connection
Table 12. Pin Description of the SIM Socket
Signal
VCC
Pin Number
Description
1
2
3
4
5
6
7
8
SIM-VCC
RST
CLK
CC4
GND
VPP
I/O
~SIM-RST
SIM-CLK
Not connected
GROUND
Not connected
SIM-IO
CC8
Not connected
Note:
CC4 and CC8 are not connected as the WISMO218 does not support SIM detect feature.
WA_DEV_W218_PTS_002
Rev 005
Page 46 of 109
Download from Www.Somanuals.com. All Manuals Search And Download.
Product Technical Specification &
Customer Design Guidelines
General Purpose Input/Output
The WISMO218 provides up to 3 General Purpose I/Os. They are used to control any external device
such as an LCD or a Keyboard backlight.
These GPIOs offer the possibility to read the pin state whatever their direction may be.
Pin Description
Table 13. GPIO Pin Descriptions
Signal
Pin Number
24
I/O
I/O
I/O Type
2V8
Reset State
GPIO1
GPIO3
GPIO5
Pull up
16
19
I/O
I/O
2V8
2V8
Pull up
Pull down
GPIO2 is dedicated for WISMO_READY and is not open as GPIO purpose for customer use.
GPIO4 is dedicated for TX burst indication and is not open as GPIO purpose for customer use.
When GPIO5 is used as a general purpose output, it is necessary to have an external pull up resistor connecting to a 2.8V
source. Resistance value depends on the current drain required by the application side.
WA_DEV_W218_PTS_002
Rev 005
Page 47 of 109
Download from Www.Somanuals.com. All Manuals Search And Download.
Product Technical Specification &
Customer Design Guidelines
Analog to Digital Converter
One Analog to Digital Converter input is provided by the WISMO218. It is a 10-bit resolution
converter, ranging from either 0 to 1V or 0 to 3V, depending on the general purpose input mode.
Features
The AUX-ADC0 input can be used for customer applications.
Table 14. Electrical Characteristics of ADC
Parameter
Min
Typ
Max
Unit
Resolution
-
10
-
-
bits
kHz
V
Sampling frequency
-
200
1
1 general purpose input
0
-
Input signal range
1 general purpose input in
div-by-3 mode
0
-
3
V
Integral non-linearity (INL)
-2.5
-1
-
-
-
-
+2.5
+3
-
bit
Differential non-linearity (DNL)
bit
input resistance
input capacitance
120
-
K
pF
Input impedance
10
Pin Description
Table 15. Analog to Digital Converter Pin Description
Signal
Pin Number
I/O
I/O Type
Analog
Description
A/D converter
AUX-ADC0
5
I
Caution: The AUX-ADC0 pin is ESD sensitive. It is a must to add ESD protection to this pin once it is externally
accessible.
Recommended ESD protection: AVL5M02200 from Amotech.
WA_DEV_W218_PTS_002
Rev 005
Page 48 of 109
Download from Www.Somanuals.com. All Manuals Search And Download.
Product Technical Specification &
Customer Design Guidelines
Analog Audio Interface
The WISMO218 supports one microphone input and one speaker output. It also includes an echo
cancellation feature which allows hands free function.
In some cases, ESD protection must be added on the audio interface lines.
Microphone Features
The microphone, MIC, can either have a single-ended or a differential connection. However, it is
strongly recommended to use a differential connection in order to reject common mode noise and
TDMA noise.
When using a single-ended connection, be sure to have a very good ground plane, very good filtering
as well as shielding in order to avoid any disturbance on the audio path.
The gain of MIC inputs is internally adjusted and can be tuned using AT commands.
The MIC already includes suitable biasing for an electret microphone. The electret microphone can
then be connected directly on the inputs for easy connection.
AC coupling is also already embedded in the WISMO218.
DC Equivalent Circuit
AC Equivalent Circuit
Z2
R2
R2
MICP
MICN
MICP
MICN
MIC2+
Z2
GND
GND
Figure 13. DC and AC Equivalent Circuits of MIC
Table 16. Electrical Characteristics of MIC
Electrical Characteristics
Parameters
Min
Typ
Max
Unit
MICP
-
-
2.4
2.4
-
-
V
V
MICN without 2.2K
to GND
Internal biasing
MICN with 2.2K to
GND
-
-
1.2
-
-
V
DC Characteristics
Output current
R2
mA
2.2
2.2
K
Z2 MICP
(MICN=Open)
AC Characteristics
K
WA_DEV_W218_PTS_002
Rev 005
Page 49 of 109
Download from Www.Somanuals.com. All Manuals Search And Download.
Product Technical Specification &
Customer Design Guidelines
Parameters
Min
Typ
Max
Unit
200 Hz<F<4 kHz
Z2 MICN
(MICP=Open)
Z2 MICP
(MICN=GND)
2.2
4.5
Z2 MICN
(MICP=GND)
Impedance between
MICP and MICN
without 2.2K to
GND
Impedance between
MICP and MICN with
2.2K to GND
3.2
-
Maximum working voltage
( MICP-MICN)
(THD 10%)
-
mVpp
V
AT+VGT*=1
210
Maximum rating voltage
(MICP or MICN)
-0.5
-
4.4
*
The input voltage depends on the input micro gain set by the AT command. Please refer to the document [2],
**
Because both MICP and MICN are internally biased, it is necessary to use a coupling capacitor to connect an
audio signal provided by an active generator. Only a passive microphone can be directly connected to the MICP input.
Speaker Features
The speaker, SPK, can either have a single-ended or a differential connection. However, it is strongly
recommended to use a differential connection in order to reject common mode noise and TDMA
noise. Moreover, in single-ended mode, half (½) of the power is lost.
When using a single-ended connection, be sure to have a very good ground plane, very good filtering
as well as shielding in order to avoid any disturbance on the audio path.
Table 17. Speaker Details
Parameter
Z (SPKP, SPKN)
Typ
16 or 32
Unit
Connection
Differential mode
Single-ended mode
Z (SPKP, SPKN)
8
Speakers Outputs Power
The maximal specifications given below are available with the maximum power output configuration
values set by an AT command. The typical values are recommended.
WA_DEV_W218_PTS_002
Rev 005
Page 50 of 109
Download from Www.Somanuals.com. All Manuals Search And Download.
Product Technical Specification &
Customer Design Guidelines
SPK Outputs
The SPK interface allows for both differential and single ended speaker connections.
WISMO218
SPKN
SPKP
Figure 14. Equivalent Circuit for SPK
Table 18. Electrical Characteristics of SPK
Parameters
Min
Typ
1.4
Max
Unit
Biasing voltage
SPKP and SPKN
-
-
-
-
-
6
-
-
-
V
-
-
-
-
8
-
-
1
Vpp
Vpp
Vpp
Vpp
RL=8: AT+VGR=6*; single ended
RL=8: AT+VGR=6*; differential
RL=16 or 32: AT+VGR=6*; single ended
RL=16 or 32: AT+VGR=6*; differential
Load resistance
2
Output swing
voltage
1.1
2.2
-
RL
IOUT
POUT
90
65
mA
mW
Output current; peak value; RL=8
RL=8; AT+VGR=10*;
*
The output voltage depends on the output speaker gain set by the AT command. Please refer to document [2]
If a single-ended connection is used, only SPKP has to be connected. The result is a maximal output
power divided by 2.
Pin Description
Table 19. Analog Audio Interface Pin Descriptions
Pin
Number
Signal
I/O
I/O Type
Analog
Description
Microphone positive input
MICP
MICN
SPKP
SPKN
3
I
I
4
1
2
Analog
Analog
Analog
Microphone negative input
Speaker positive output
Speaker negative output
O
O
WA_DEV_W218_PTS_002
Rev 005
Download from Www.Somanuals.com. All Manuals Search And Download.
Page 51 of 109
Product Technical Specification &
Customer Design Guidelines
Application
Microphone
The following subsections define different microphone configuration examples.
Microphone Differential Connection Example
When a differential connection of MIC is used, it is necessary to add a 2.2K resistor from MICN to
GND in order to have proper bias of the microphone.
Figure 15. Example of MIC Input Differential Connection with LC Filter
Note: Audio quality can be very good without L1, L2, C2, C3 and C4 depending on the design. But if
there is EMI perturbation, this filter can reduce the TDMA noise. This filter (L1, L2, C2, C3 and C4) is
not mandatory. If not used, the capacitor must be removed and the coil replaced by a 0 resistor as
the shown in the following schematic.
WA_DEV_W218_PTS_002
Rev 005
Page 52 of 109
Download from Www.Somanuals.com. All Manuals Search And Download.
Product Technical Specification &
Customer Design Guidelines
Figure 16. Example of MIC Input Differential Connection without LC Filter
The capacitor C1 is highly recommended to eliminate TDMA noise. Note that C1 must be close to the
microphone.
Recommended Components
Component
Description/Details
12pF to 33pF
Notes
C1
needs to be tuned depending on the design
needs to be tuned depending on the design
needs to be tuned depending on the design
C2, C3, C4
L1, L2
47pF
100nH
Microphone Single-Ended Connection Example
When single-ended connection is used for MIC, MICN is just left open.
WA_DEV_W218_PTS_002
Rev 005
Page 53 of 109
Download from Www.Somanuals.com. All Manuals Search And Download.
Product Technical Specification &
Customer Design Guidelines
Figure 17. Example of MIC Input Single-Ended connection with LC Filter
*Z2 is from 200Hz to 4kHz. For more characteristics refer to the Electrical Characteristics section.
Note that:
Internal input impedance value becomes 1100, due to the connection of the other end to
ground.
The single ended design is very sensitive to TDMA noise.
It is recommended to add L1 and C2 footprint as an LC filter to try to eliminate TDMA noise.
A very good grounding on the MIC is a must in order to ensure good audio performance
against TDMA. Also, special care on the PCB layout must be taken.
When not used, the filter can be removed by replacing L1 with a 0 resistor and by
disconnecting C2, as shown in the following schematic.
WA_DEV_W218_PTS_002
Rev 005
Page 54 of 109
Download from Www.Somanuals.com. All Manuals Search And Download.
Product Technical Specification &
Customer Design Guidelines
Figure 18. Example of MIC Input Single-Ended Connection without LC Filter
*Z2 is from 200Hz to 4kHz. For more characteristics refer to the Electrical Characteristics section.
The capacitor C1 is highly recommended to eliminate TDMA noise. Note that C1 must be close to the
microphone.
Recommended Components
Component
Description/Details
12pF to 33pF
Notes
C1
C2
L1
needs to be tuned depending on the design
needs to be tuned depending on the design
needs to be tuned depending on the design
WA_DEV_W218_PTS_002
Rev 005
Download from Www.Somanuals.com. All Manuals Search And Download.
Page 55 of 109
Product Technical Specification &
Customer Design Guidelines
Speaker SPKP and SPKN
SPK Differential Connection
SPKP
SPKN
Figure 19. Example of Speaker Differential Connection
SPK Single-Ended Connection
Typical implementation:
C1
+
SPKP
33 pF
to
100 pF
C3
Speaker
Z hp
SPKN
X
Figure 20. Example of Speaker Single-Ended Connection
4.7µF < C1 < 47 µF (Depending on speaker characteristics and output power.)
Using a single-ended connection includes losing output power (-6dB) as compared to a differential
connection.
The connection between the WISMO218 pins and the speaker must be designed to keep the serial
impedance lower than 1.5 in a single-ended connection.
SPKN can be left open in a single-ended connection.
Design Recommendation
General
When both speaker and microphone are exposed to the external environment, it is recommended to
add ESD protection as close as possible to the speaker or microphone, connected between the audio
lines and a good ground.
When using the single-ended connection of MICP, ensure to have a good ground plane, good filtering
as well as shielding, in order to avoid any disturbance on the audio path.
WA_DEV_W218_PTS_002
Rev 005
Page 56 of 109
Download from Www.Somanuals.com. All Manuals Search And Download.
Product Technical Specification &
Customer Design Guidelines
It is important to select an appropriate microphone, speaker and filtering components to avoid
TDMA noise.
Recommended Microphone Characteristics
The impedance of the microphone has to be around 2K.
Sensitivity is from -40dB to –50 dB.
SNR > 50 dB.
Frequency response is compatible with the GSM specifications.
To suppress TDMA noise, it is highly recommended to use microphones with two internal
decoupling capacitors:
CM1=56pF (0402 package) for the TDMA noise coming from the demodulation of the
GSM900 frequency signal
CM2=15pF (0402 package) for the TDMA noise coming from the demodulation of the DCS
frequency signal
The capacitors have to be soldered in parallel to the microphone:
CM
Figure 21. Microphone
Recommended Speaker Characteristics
Type of speakers: Electro-magnetic /10mW
Impedance: 8 for hands-free
Impedance: 32 for heads kit
Sensitivity: 110dB SPL min
Receiver frequency response is compatible with the GSM specifications.
Recommended Filtering Components
When designing a GSM application, it is important to select the right audio filtering components.
The strongest noise, called TDMA, is mainly due to the demodulation of the GSM900 and DCS1800
signal: A burst is produced every 4.615ms; where the frequency of the TDMA signal is equal to
216.7Hz plus harmonics.
The TDMA noise can be suppressed by filtering the RF signal using the right decoupling components.
WA_DEV_W218_PTS_002
Rev 005
Page 57 of 109
Download from Www.Somanuals.com. All Manuals Search And Download.
Product Technical Specification &
Customer Design Guidelines
The types of filtering components are:
RF decoupling inductors
RF decoupling capacitors
A good “Chip S-Parameter” simulator is proposed by Murata. Refer to
http://www.murata.com/products/design_support/mcsil/index.html for more details.
Using different Murata components, we could see that the value, the package and the current rating
can have different decoupling effects.
WA_DEV_W218_PTS_002
Rev 005
Page 58 of 109
Download from Www.Somanuals.com. All Manuals Search And Download.
Product Technical Specification &
Customer Design Guidelines
The table below shows some examples with different Murata components:
Table 20. Murata Examples
Package
Filtered band
Value
0402
GSM 850/900
56pF
GSM900
100nH
Inductor
Serial
DCS/PCS
15pF
Types
Capacitor
Capacitor
Shunt
Shunt
Position
Manufacturer
Rated
Murata
150mA
Murata
Murata
50V
50V
LQG15HSR10J02 or
LQG15HNR10J02
GRM1555C1H150JZ01 or
GRM1555C1H150JB01
GRM1555C1H560JZ01
Reference
Package
0603
GSM 850/900
47pF
GSM900
100nH
DCS/PCS
10pF
Filtered band
Value
Types
Inductor
Serial
Capacitor
Shunt
Capacitor
Shunt
Position
Manufacturer
Rated
Murata
Murata
Murata
50V
300mA
50V
GRM1885C1H470JA01 or
GRM1885C1H470JB01
GRM1885C1H150JA01 or
GQM1885C1H150JB01
LQG18HNR10J00
Reference
Audio Track and PCB Layout Recommendation
To avoid TDMA noise, it is recommended to surround the audio tracks with ground as shown in the
following figure:
WA_DEV_W218_PTS_002
Rev 005
Page 59 of 109
Download from Www.Somanuals.com. All Manuals Search And Download.
Product Technical Specification &
Customer Design Guidelines
Figure 22. Audio Track Design
For differential connections, it is necessary to add a 2.2KΩ resistor from MICN to GND to have a
proper bias of the microphone. Refer to the following figure.
Differential Audio line is
always in parallel
Figure 23. Differential Audio Connection
For single-ended connections, the negative pole of the microphone, MICN, should be connected to
GND. Refer to the following figure.
WA_DEV_W218_PTS_002
Rev 005
Page 60 of 109
Download from Www.Somanuals.com. All Manuals Search And Download.
Product Technical Specification &
Customer Design Guidelines
Figure 24. Single-Ended Audio Connection
Caution: It is a must to avoid digital tracks crossing under and over the audio tracks.
Even when MICP is singled-ended, it is highly recommended to have the MIC ground and the LC
filter ground to act as an audio analog ground during the PCB layout. This audio ground, together
with the MICP signal, should act as the differential line pair. And this audio ground should only be
connected to the WISMO218 module ground as close as possible to the castellation GND pin of
WISMO218. It is the same case for SPKP and SPKN.
Also, the audio interface is ESD sensitive. It is a must to add ESD protection to the interface once it is
externally accessible.
Recommended ESD protection: ESDA6VIL from ST.
WA_DEV_W218_PTS_002
Rev 005
Page 61 of 109
Download from Www.Somanuals.com. All Manuals Search And Download.
Product Technical Specification &
Customer Design Guidelines
Pulse-Width Modulators (PWMs)
The WISMO218 contains two Pulse-Width Modulators (PWMs). They can be used in conjunction with
an external transistor for driving a vibrator, or a backlight LED.
Features
Each PWM uses two 7-bit unsigned binary numbers: one for the output period and one for the pulse
width or the duty cycle.
The relative timing for the PWM output is shown in the figure below.
Figure 25. Relative Timing for the PWM Output
Table 21. PWM Electrical Characteristics
Parameter
VOH
Condition
Minimum
2.7
Typical
2.85
Maximum
Unit
High impedance load
Load with IoH = 4mA
-
-
V
V
-
-
2.4
-
-
-
-
-
0.1
V
VOL
IPEAK
-
-
-
-
4
mA
kHz
%
Frequency
Duty cycle
25.6
0*
1083.3
100*
Pin Description
Table 22. PWM Pin Descriptions
Signal
PWM0
Pin Number
I/O
I/O Type
Description
36
35
O
O
2V8
2V8
PWM output
PWM output
PWM1
Application
Both the PWM0 and PWM1 signals can be used in conjunction with an external transistor for driving
a vibrator, or a backlight LED.
WA_DEV_W218_PTS_002
Rev 005
Page 62 of 109
Download from Www.Somanuals.com. All Manuals Search And Download.
Product Technical Specification &
Customer Design Guidelines
Figure 26. Example of a LED Driven by the PWM0 or PWM1 Output
The value of R607 can be harmonized depending on the LED (D605) characteristics.
The recommended digital transistor to use for T601 is the DTC144EE from ROHM.
WA_DEV_W218_PTS_002
Rev 005
Page 63 of 109
Download from Www.Somanuals.com. All Manuals Search And Download.
Product Technical Specification &
Customer Design Guidelines
BUZZER Output
The signal BUZZER outputs a square wave at the desired tone frequency. The tone frequencies are
programmable and can be re-programmed on-the-fly to generate monophonic audio ringtones or
alert tones. The tone level can also be adjusted in 4dB steps, or it can be muted.
Features
The signal BUZZER can be used in conjunction with an external transistor/MOSFET for driving a
buzzer in order to give a maximum current of 100mA (PEAK) and an average of 40mA, depending on
application requirement.
Figure 27. BUZZER Output
Table 23. BUZZER Electrical Characteristics
Parameter
VOH
Condition
Minimum
2.7
Typical
2.85
Maximum
Unit
High impedance load
-
V
V
Load with IoH = 4mA
-
2.4
-
IPEAK
-
-
-
-
-
-
-
4
mA
V
VOL
-
-
0.1
Frequency
Duty cycle
Tone level
-
200
0*
-24
2500
100*
0
Hz
%
-
4 dB step
dB
*
Be mindful of the maximum frequency and the minimum/maximum duty cycle. There is a limitation due to the
RC environment. The amplitude modulation becomes less fine when the set limits are reached.
Pin Description
Table 24. BUZZER Pin Descriptions
Signal
BUZZER
Pin Number
I/O
I/O Type
2.8V
Description
Buzzer output
34
O
WA_DEV_W218_PTS_002
Rev 005
Download from Www.Somanuals.com. All Manuals Search And Download.
Page 64 of 109
Product Technical Specification &
Customer Design Guidelines
Application
The maximum peak current of the transistor/MOSFET is 100mA and the maximum average current is
40mA, while the peak current of the BUZZER pin should be less than 4mA. A diode against transient
peak voltage must be added as shown below.
VBATT
R1
C1
D1
T1
WISMO218
R2
BUZZER
34
R3
GND
GND
Figure 28. Example of Buzzer Implementation
Where:
R1 must be chosen in order to limit the current at IPEAK max of 100mA and must be adjusted in
function of the frequency and the duty cycle used.
D1 = BAV70T-7 or BAS16 (for example)
T1 = FDN335N (for example)
R2 = 0
R3 = 1M
A low filter is recommended at low frequencies.
WA_DEV_W218_PTS_002
Rev 005
Page 65 of 109
Download from Www.Somanuals.com. All Manuals Search And Download.
Product Technical Specification &
Customer Design Guidelines
Calculations of the Low Filter:
Req is the total resistor in line.
C is the capacitive charge on T1 and the ground.
The cut-off frequency (Fc) must be higher than FBUZZ-OUT.
Due to the conception of this signal, the frequency modulation of the BUZZER signal is 64* FBUZZ-
OUT.
Fc must be at least 64 * FBUZZ-OUT.
Fc = 1/ (2. .Req.C)
Recommended characteristics for the buzzer
Electro-magnetic type
Impedance: 7 to 30
Sensitivity: 90 dB SPL min @ 10 cm
Current: 60 to 90mA
The BUZZER output can also be used to drive a LED as shown in the figure below:
Figure 29. Example of LED Driven by the BUZZER Output
The value of R607 can be harmonized depending on the LED (D605) characteristics.
The recommended digital transistor to use for T601 is the DTC144EE from ROHM.
WA_DEV_W218_PTS_002
Rev 005
Page 66 of 109
Download from Www.Somanuals.com. All Manuals Search And Download.
Product Technical Specification &
Customer Design Guidelines
ON/~OFF Signal
The ON/~OFF pin is used to switch ON or switch OFF the WISMO218.
ON/~OFF signal is internally connected to the permanent 3.0V supply regulator inside the WISMO218
via a pull-up resistor. Once there is VBATT supply to the WISMO218, this 3.0V supply regulator will
be enabled and so the ON/~OFF signal is by default at HIGH level.
A LOW level signal has to be provided on the ON/~OFF pin to switch ON the WISMO218.
Caution: All external signals must be inactive when the WISMO218 is OFF to avoid any damage when starting
and to allow the WISMO218 to start and stop correctly.
Avoid using application MCU GPIO to directly control the ON/~OFF signal of the WISMO218; instead,
control this signal via an open collector switching transistor.
Features
Table 25. Electrical Characteristics of the ON/~OFF Signal
Parameter
I/O Type
Minimum
Typ.
Maximum
Unit
VIH
VIL
2V8
2V8
2.4
-
-
-
3.0
0.4
V
V
Pin Description
Table 26. ON/~OFF Signal Pin Descriptions
Signal
Pin Number
I/O
I/O Type
Description
ON/~OFF
37
I
2V8
WISMO218 Power ON/OFF
WA_DEV_W218_PTS_002
Rev 005
Download from Www.Somanuals.com. All Manuals Search And Download.
Page 67 of 109
Product Technical Specification &
Customer Design Guidelines
Application
Switch
1
3
2
ON/~OFF
GND
Figure 30. Example of the ON/~OFF Pin Connection Either By a Switch or Via an Open Collector Transistor
Power ON
Figure 31. Power-ON Sequence (no PIN code activated)
WA_DEV_W218_PTS_002
Rev 005
Download from Www.Somanuals.com. All Manuals Search And Download.
Page 68 of 109
Product Technical Specification &
Customer Design Guidelines
Min
Typ.
Max
Unit
Tready
4
-
5
-
7
s
Trampup
120
ms
The ON/~OFF signal level is detected about 250ms after VBATT is available. Note that this timing
might be temperature dependant.
The voltage of this signal has to be pulled LOW for at least 685ms for powering ON. Within this
685ms, the WISMO_READY signal will initially reset to HIGH for about 135ms and then resume to
LOW.
During the power ON sequence, an internal reset is automatically performed for 38ms (typically).
During this phase, any external reset should be avoided.
Once the WISMO218 is properly powered ON, the WISMO_READY pin will set to HIGH level to
acknowledge the successful powering ON of the WISMO218 before it is ready to operate. The
ON/~OFF signal can be left at LOW level until power off.
Please note that temperature conditions may affect the timing for powering up.
The recommended way to release the ON/~OFF signal is to detect the WISMO_READY signal within
685ms of powering ON while the level pulse of the ON/~OFF signal is set to LOW, and wait until the
WISMO_READY signal goes HIGH again.
Power OFF
The WISMO218 can be powered off by either software or hardware.
Software power off
AT command: AT+CPOF is used to power off the WISMO218.
Note: If the ON/~OFF pin is maintained at LOW level when AT+CPOF is used, the module can’t be
switched OFF.
Hardware power off
A LOW level pulse is applied on the ON/~OFF pin for 5.5sec. AT+CPOF will then be automatically
sent to the WISMO218.
Once the WISMO218 receives the AT+CPOF command, the WISMO218 will be deregistered from the
network. The WISMO_READY pin will become LOW to indicate that AT commands are no longer
available for the WISMO218. If the ON/~OFF signal is HIGH, then the WISMO218 will also be
switched off.
WA_DEV_W218_PTS_002
Rev 005
Page 69 of 109
Download from Www.Somanuals.com. All Manuals Search And Download.
Product Technical Specification &
Customer Design Guidelines
WISMO_READY Indication
This signal indicates the ready status of the WISMO218 after powering on. Please note that there is an
initial positive pulse of less than 200ms during power ON. For details, please refer to the power ON
WISMO_READY pin will set to HIGH level to acknowledge the successful powering ON of the
WISMO218 before it is ready to operate.
On the other hand, the level will go LOW before powering off.
Features
Table 27. Electrical Characteristics of the Signal
Parameter
I/O Type
Minimum
2.7
Typ.
Maximum
Unit
VOH
VOL
2V8
2V8
2.8
-
2.95
0.4
V
V
-
Pin Description
Table 28. WISMO_READY Indication Pin Descriptions
Signal
Pin Number
I/O
I/O Type
Description
WISMO_READY
7
O
2V8
WISMO218 ready indication
WA_DEV_W218_PTS_002
Rev 005
Download from Www.Somanuals.com. All Manuals Search And Download.
Page 71 of 109
Product Technical Specification &
Customer Design Guidelines
VCC_2V8 output
The VCC_2V8 output can only be used for pull-up resistor(s) and as a reference supply.
This voltage supply is available when the WISMO218 is switched on.
Features
Table 29. Electrical Characteristics of the Signals
Parameter
Minimum
Typ
2.80
Maximum
Unit
Output voltage
2.70
-
2.95
50
V
Full-power mode
Sleep mode
-
-
mA
mA
VCC_2V8
Output Current
-
3
Pin Description
Table 30. VCC_2V8 Pin Descriptions
Signal
VCC_2V8
Pin Number
I/O
I/O Type
Supply
Description
46
O
Digital supply
Application
This digital power supplies are mainly used to:
Pull-up signals such as I/O
Supply the digital transistors driving LEDs
Act as a voltage reference for ADC interface AUX-ADC0
WA_DEV_W218_PTS_002
Rev 005
Download from Www.Somanuals.com. All Manuals Search And Download.
Page 72 of 109
Product Technical Specification &
Customer Design Guidelines
BAT-RTC (Backup Battery)
The WISMO218 provides an input/output to connect a Real Time Clock power supply.
Features
This pin is used as a back-up power supply for the internal Real Time Clock. The RTC is supported
by the WISMO218 when VBATT is available but a back-up power supply is needed to save date and
hour when VBATT is switched off.
If the RTC is not used, this pin can be left open.
If VBATT is available, the back-up battery can be charged by the internal 3.0V power supply regulator
via a 2K resistor implemented inside the WISMO218.
Table 31. Electrical Characteristics of the Signal
Parameter
Minimum
Typ
Maximum
Unit
Input voltage
-
-
3.0
2.5
3.0
0.6
-
-
V
Input current consumption*
Output voltage
µA
V
2.82
-
3.18
-
Max charging current (@VBATT=3.6V)
mA
*
Provided by an RTC back-up battery when the WISMO218 is off and VBATT = 0V.
Pin Description
Table 32. BAT-RTC Pin Descriptions
Signal
BAT-RTC
Pin Number
I/O
I/O
I/O Type
Supply
Description
RTC Back-up supply
6
Application
The Back-up Power Supply can be provided by any of the following:
A super capacitor
A non rechargeable battery
A rechargeable battery cell
WA_DEV_W218_PTS_002
Rev 005
Download from Www.Somanuals.com. All Manuals Search And Download.
Page 73 of 109
Product Technical Specification &
Customer Design Guidelines
Super Capacitor
Figure 33. RTC Supplied by a Gold Capacitor
Estimated range with 0.47 Farad Gold Cap: 25 minutes minimum.
Note: The Gold Capacitor maximum voltage is 3.9V.
Non-Rechargeable Battery
Figure 34. RTC Supplied by a Non Rechargeable Battery
The diode D1 is mandatory to prevent the non rechargeable battery from being damaged.
Estimated range with 85 mAh battery: 800 hours minimum.
WA_DEV_W218_PTS_002
Rev 005
Page 74 of 109
Download from Www.Somanuals.com. All Manuals Search And Download.
Product Technical Specification &
Customer Design Guidelines
Rechargeable Battery Cell
Figure 35. RTC Supplied by a Rechargeable Battery Cell
Rechargeable battery cell: Sanyo ML614
Estimated range with fully charged 3.4mAh rechargeable battery: at least 7 days.
Caution: Before battery cell assembly, ensure that cell voltage is lower than 3.0V to avoid damaging the
WISMO218.
WA_DEV_W218_PTS_002
Rev 005
Page 75 of 109
Download from Www.Somanuals.com. All Manuals Search And Download.
Product Technical Specification &
Customer Design Guidelines
TX_CTRL Signal for TX Burst Indication
Features
The TX_CTRL signal is a 2.8V indication signal for TX Burst with a 100K pull-up resistor
implemented inside the WISMO218 module.
Table 33. TX_CTRL Status
WISMO218 State
During TX burst
No TX
TX_CTRL Status
Low
High
During TX burst, there will be higher current drain from the VBATT power supply which causes a
voltage drop. This voltage drop from VBATT is a good indication of a high current drain situation
during TX burst.
The blinking frequency is about 216Hz.
The output logic low duration, Tduration, depends on the number of TX slots and is computed as
follows:
Tduration = Tadvance + (0.577ms x number of TX slots) + Tdelay.
Figure 36. TX_CTRL State During TX Burst
Table 34. Electrical Characteristics of the Signal
Parameter
Condition
Minimum
2.6
Typ.
Maximum
2.95
Unit
VOH
VOL
-
V
-
-
-
-
0.4
V
@500mA
@1A
18
27
-
-
µs
µs
Tadvance
WA_DEV_W218_PTS_002
Rev 005
Page 76 of 109
Download from Www.Somanuals.com. All Manuals Search And Download.
Product Technical Specification &
Customer Design Guidelines
Parameter
Condition
Minimum
Typ.
Maximum
Unit
Tdelay
-
11
-
µs
Pin Description
Table 35. TX_CTRL Signal Pin Descriptions
Pin
Signal
I/O
I/O Type
Reset State
Description
Number
TX_CTRL
18
O
2V8
1
TX Burst indication
Application
The TX burst indication signal, TX_CTRL, can be used to drive a LED through a transistor. It will
then be a good visual indicator for any TX activities.
Figure 37. Example of TX Status Implementation
The value of R607 can be harmonized depending on the LED (D605) characteristics.
WA_DEV_W218_PTS_002
Rev 005
Page 77 of 109
Download from Www.Somanuals.com. All Manuals Search And Download.
Product Technical Specification &
Customer Design Guidelines
Reset
The WISMO218 has an input ~RESET pin. This is a hardware reset and should only be used for
emergency reset.
Feature
The ~RESET signal has a 100K internal pull up resistor to VCC_2V8.
Figure 38. Reset Timing
Table 36. Electrical Characteristics of the Signals
Parameter
Minimum
Typ
100K
Maximum
Unit
Input Impedance ( R )*
Input Impedance (C)
-
-
-
10nF
F
Cancellation time (Ta)
at power up only
~RESET
-
38
-
-
ms
VH**
VIL
1.57
-
-
V
V
V
0
1.2
--
VIH
1.96
2.8
*
Internal pull up resistance
VH : Hysterisis Voltage
**
Sequence after an external reset event (~RESET)
To activate the « emergency » reset sequence, the ~RESET signal has to be set to LOW level manually,
for example, by a push button.
Pin Description
Table 37. Reset Pin Descriptions
Signal
~RESET
Pin Number
I/O
I/O Type
2V8
Description
12
100K Pull-up
WISMO218 Reset
WA_DEV_W218_PTS_002
Rev 005
Page 78 of 109
Download from Www.Somanuals.com. All Manuals Search And Download.
Product Technical Specification &
Customer Design Guidelines
Application
If the « emergency » reset is used, it has to be driven by an open collector or an open drain output
(due to the internal pull-up resistor embedded into the WISMO218) as shown in the figure below.
Push button
1
2
~RESET
3
GND
Figure 39. Example of ~RESET Pin Connection with Push Button Configuration
~RESET
Reset
command
T1
Rohm DTC144EE
GND
Figure 40. Example of ~RESET Pin Connection with Transistor Configuration
An open collector or open drain transistor can be used to drive the ~RESET pin. If an open collector is
chosen, the recommended digital transistor to use for T1 is the DTC144EE from ROHM.
Table 38. Reset Commands
Reset Command
~RESET
Operating Mode
1
0
0
1
Reset activated
Reset inactive
Note:
It is recommended to add a varistor (AVL5M02200) on the ~RESET pin in order to enhance the ESD
immunity.
WA_DEV_W218_PTS_002
Rev 005
Page 79 of 109
Download from Www.Somanuals.com. All Manuals Search And Download.
Product Technical Specification &
Customer Design Guidelines
RF Interface
The impedance is 50 nominal and the DC resistance is 0.
RF Connection
The RF input/output of the WISMO218 is through one of the castellation pins (Pin 21). A 50
stripline can be used to connect to standard RF connectors such as SMA, UFL, etc. for antenna
connection.
Note:
The antenna cable and connector should be chosen in order to minimize loss in the frequency bands
used for GSM900MHz and 1800MHz.
Note:
0.5dB can be considered as a maximum value for loss between the WISMO218 and an external
connector.
RF Performances
RF performances are compliant with the ETSI recommendation GSM 05.05.
The main parameters for the Receiver are:
E-GSM900 Reference Sensitivity = -109 dBm (typ.)
DCS1800 Reference Sensitivity = -109 dBm (typ.)
Selectivity @ 200 kHz : > +9 dBc
Selectivity @ 400 kHz : > +41 dBc
Linear dynamic range: 63 dB
Co-channel rejection: >= 9 dBc
The main parameters for the Transmitter are:
Maximum output power (EGSM): 33 dBm +/- 2 dB at ambient temperature
Maximum output power (GSM1800): 30 dBm +/- 2 dB at ambient temperature
Minimum output power (EGSM): 5 dBm +/- 5 dB at ambient temperature
Minimum output power (GSM1800): 0 dBm +/- 5 dB at ambient temperature
Antenna Specifications
The antenna must fulfill the requirements listed in the table below.
The optimum operating frequency depends on the application. A dual Band antenna will work in
these frequency bands and should have the following characteristics:
WA_DEV_W218_PTS_002
Rev 005
Page 80 of 109
Download from Www.Somanuals.com. All Manuals Search And Download.
Product Technical Specification &
Customer Design Guidelines
Table 39. Antenna Specifications
WISMO218
Characteristic
E-GSM 900
880 to 915 MHz
DCS 1800
TX Frequency
RX Frequency
Impedance
1710 to 1785 MHz
1805 to 1880 MHz
925 to 960 MHz
50
Rx max
VSWR
1.5 :1
Tx max
1.5 :1
Typical radiated gain
0dBi in one direction at least
Caution: Sierra Wireless strongly recommends working with an antenna manufacturer either to develop an
antenna adapted to the application or to adapt an existing solution to the application. Both the
mechanical and electrical antenna adaptations are one of the key issues in the design of the GSM
terminal.
The RF antenna connection uses one of the castellation pins of the WISMO218, with grounded
castellation pins at both sides.
This castellation pin must be connected to an RF 50 line, in order to protect the antenna line from
the noise coming from base-band signals.
50 RF line
Castellation pin for ANT
Figure 41. Example of an RF 50 line
This 50 line is surrounded by two ground planes in order to protect this antenna line from noise.
The length of the line shouldn’t be too long (more than a few centimeters) because of RF insertion
loss. The width of the line must be calculated in order to ensure a 50 characteristic impedance.
For this same reason, the RF embedded line should likewise be kept about 1cm away from any (noisy)
baseband signal in order to ensure a good RX sensitivity level.
The other end of the RF 50 line can be connected to an RF connector or a soldering pad in order to
connect an antenna.
WA_DEV_W218_PTS_002
Rev 005
Page 81 of 109
Download from Www.Somanuals.com. All Manuals Search And Download.
Product Technical Specification &
Customer Design Guidelines
It is also possible to use an antenna chip or to design a PCB antenna directly on the application board.
The ANT pin of the WISMO218 is ESD protected, for both ±4KV contact and ±8KV air discharge.
WA_DEV_W218_PTS_002
Rev 005
Page 82 of 109
Download from Www.Somanuals.com. All Manuals Search And Download.
Product Technical Specification &
Customer Design Guidelines
4. Consumption Measurement
Procedure
This chapter describes the consumption measurement procedure used to obtain the WISMO218
consumption specification.
The WISMO218 consumption specification values are measured for all operating modes available on
the product.
Consumption results are highly dependent on the hardware configuration used during measurement.
This chapter also describes the hardware configuration settings that must be used to obtain optimum
consumption measurements.
Hardware Configuration
The following hardware configuration includes both the measurement equipment and the WISMO218
with its socket-up board on the WISMO218 development kit.
Equipment
Four devices are used to perform consumption measurement:
A communication tester
A current measuring power supply
A standalone power supply
A computer, to control the WISMO218 and save measurement data
WA_DEV_W218_PTS_002
Rev 005
Page 83 of 109
Download from Www.Somanuals.com. All Manuals Search And Download.
Product Technical Specification &
Customer Design Guidelines
Figure 42. Typical hardware configuration
The communication tester is a CMU 200 from Rhode & Schwartz. This tester offers all GSM/GPRS
network configurations required and allows a wide range of network configurations to be set.
The AX502 standalone power supply is used to supply all motherboard components except the
WISMO218. The goal is to separate the WISMO218 Development Kit board consumption from the
WISMO218 consumption - which is measured by the other power supply, the 66321B “current
measuring power supply”.
The “current measuring power supply” is also connected and controlled by the computer (GPIB
control not shown in the previous figure).
A SIM must be inserted in the WISMO218 Development Kit during all consumption measurements.
WA_DEV_W218_PTS_002
Rev 005
Page 84 of 109
Download from Www.Somanuals.com. All Manuals Search And Download.
Product Technical Specification &
Customer Design Guidelines
Table 40. Equipment Reference List
Device
Manufacturer
Rhode & Schwartz
Agilent
Reference
CMU 200
Notes
Quad Band
Communication Tester
GSM/DCS/GPRS
Current measuring
power supply
66321B
AX502
Used for VBATT (for WMP alone)
Stand alone power
supply
Metrix
Used for VBAT (for boards peripherals)
WISMO218 Development Kit
The WISMO218 Development Kit is used as a basis for the WISMO218 measurement via an adaptor
board. The WISMO218 Development Kit can be used to perform consumption measurement using
several settings. For the list and corresponding description of the settings, see document [3]
Note: The WISMO218 Development Kit can be replaced by Development Kit WMP100 once a suitable
socket-up board is available.
The WISMO218 is only powered by VBATT. The WISMO218 Development Kit board is powered by
the standalone power supply at VBAT. It is for this reason that the link between VBATT and VBAT
(J605) must be opened (by removing the solder at the top of the board in the SUPPLY area). Note the
following information regarding both power supplies.
VBATT is powered by the current measuring power supply (66321B)
VBAT is powered by the standalone power supply (AX502) through TP602
Also take note of the following additional configuration/settings:
The R600 resistor and the D603 and D604 diodes (around the BAT-TEMP connector) must be
removed.
The UART2 link is not used; therefore, J201, J202, J203, J204 must be opened (by removing the
solder).
The “FLASH-LED” must be not used, so J602 must be opened (by removing the solder).
The USB link is not used, therefore J301, J302, J303, J304, J305 must be opened (by removing
the solder).
The audio is not used, therefore J702, J703, J704, J705, J605 must be opened (by removing the
solder).
There is no SIM detect feature on the WISMO218; therefore, J403 must be opened (by
removing the soldered).
Charging is not used; therefore, R602 must be removed.
C600 and R607 must be removed to avoid unexpected current consumption.
The switch, BOOT (around the “CONFIG” area), must be set to the OFF position.
The goal of the settings listed above is to eliminate all bias current from VBATT and to supply the
entire board (except theWISMO218) using VBAT only.
WA_DEV_W218_PTS_002
Rev 005
Page 85 of 109
Download from Www.Somanuals.com. All Manuals Search And Download.
Product Technical Specification &
Customer Design Guidelines
Socket-Up Board Used
There is an adaptor board which is used to adapt the WISMO218 to work on the WISMO218
Development Kit. It is called the socket-up board (WM0801706-020-20).
On this socket up board, the soldering point of J203, J204, JP101, JP102, JP103, JP104, JP105, JP106 and
JP107 must be opened.
SIM Cards Used
Consumption measurement may be performed with either 3-Volt or 1.8-Volt SIM cards. However, all
specified consumption values are for a 3-Volt SIM card.
Caution: The SIM card’s voltage is supplied by the WISMO218’s power supply. Consumption measurement
results may vary depending on the SIM card used.
WA_DEV_W218_PTS_002
Rev 005
Page 86 of 109
Download from Www.Somanuals.com. All Manuals Search And Download.
Product Technical Specification &
Customer Design Guidelines
Software Configurations
This section discusses the software configuration for the equipment(s) used and the WISMO218
settings.
WISMO218 Configuration
The WISMO218 software configuration is simply performed by selecting the operating mode to be
used to perform the measurement.
A description of the operating modes and the procedure used to change the operating mode are given
in the appendix of document [2] WISMO218 AT Commands Manual.
An overview of the WISMO218 operating modes is given below:
OFF Mode
Alarm Mode
Idle Mode
Connected Mode
Transfer Mode class 8 (4Rx/1Tx) (in GPRS mode)
Transfer Mode class 10 (3Rx/2Tx) (in GPRS mode)
WA_DEV_W218_PTS_002
Rev 005
Page 87 of 109
Download from Www.Somanuals.com. All Manuals Search And Download.
Product Technical Specification &
Customer Design Guidelines
Equipment Configuration
The communication tester is set according to the WISMO218 operating mode.
Paging during idle modes, TX burst power, RF band and GSM/DCS/GPRS may be selected on the
communication tester.
Listed in the table below is the network analyzer configuration according to operating mode:
Table 41. Operating Mode Information
Operating Mode
Communication Tester Configuration
OFF Mode
N/A
N/A
Alarm Mode
Paging 9 (Rx burst occurrence ~2s)
Paging 2 (Rx burst occurrence ~0,5s)
Idle Mode
PCL5 (TX power 33dBm)
900 MHz
1800MHz
900 MHz
1800MHz
900 MHz
1800MHz
PCL19 (TX power 5dBm)
PCL0 (TX power 30dBm)
PCL15 (TX power 0dBm)
Gam.3 (TX power 33dBm)
Gam.17 (TX power 5dBm)
Gam.3 (TX power 30dBm)
Gam.18 (TX power 0dBm)
Gam.3 (TX power 33dBm)
Gam.17 (TX power 5dBm)
Gam.3 (TX power 30dBm)
Gam.18 (TX power 0dBm)
Connected Mode
Transfer Mode class 8
(4Rx/1Tx)
GPRS
Transfer Mode class 10
(3Rx/2Tx)
The standalone power supply may be set from 3.2V to 4.8V.
The power supply (VBATT) used for measurement may be set from 3.2V to 4.8V according to the
WISMO218 VBATT specifications.
WA_DEV_W218_PTS_002
Rev 005
Page 88 of 109
Download from Www.Somanuals.com. All Manuals Search And Download.
Product Technical Specification &
Customer Design Guidelines
Template
This template may be used for consumption measurement for all modes and configurations available.
Three VBATT voltages are measured: 3.2V, 3.6V and 4.8V; and the minimum/maximum RF
transmission power configurations are also set and measured.
Table 42. WISMO218 Power Consumption
WISMO218 Power Consumption
IMIN
average
INOM
average
IMAX
average
IMAX
peak
Operating mode
Parameters
Unit
VBATT=4.8VVBATT=3.6V VBATT=3.2V
Off Mode
µA
µA
Alarm Mode
N/A
Paging 2 (Rx burst occurrence ~0.5s)
Paging 9 (Rx burst occurrence ~2s)
mA
mA
mA
mA
mA
mA
mA
mA
mA
mA
mA
mA
mA
mA
Idle Mode
PCL5 (TX power 33dBm)
900 MHz
PCL19 (TX power 5dBm)
Connected Mode
PCL0 (TX power 30dBm)
1800MHz
PCL15 (TX power 0dBm)
Gam.3 (TX power 33dBm)
900 MHz
Transfer
Mode
class 8
Gam.17 (TX power 5dBm)
Gam.3 (TX power 30dBm)
1800 MHz
(4Rx/1Tx)
Gam.18 (TX power 0dBm)
GPRS
Gam.3 (TX power 33dBm)
900 MHz
Transfer
Mode
class 10
Gam.17 (TX power 5dBm)
Gam.3 (TX power 30dBm)
1800 MHz
(3Rx/2Tx)
Gam.18 (TX power 0dBm)
WA_DEV_W218_PTS_002
Rev 005
Page 89 of 109
Download from Www.Somanuals.com. All Manuals Search And Download.
Product Technical Specification &
Customer Design Guidelines
Castellation Pin
Pin-Out Description
Pin
#
Pin
#
Signal
Description
I/O
Signal
Description
I/O
Speaker output positive
32 ohms
SPKP
Analog
GPIO1
2.8V GPIO
I/O
1
2
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
Speaker output
negative 32 ohms
2.8V SPI interrupt
request input
SPKN
Analog
SPI-IRQ
GND
I
Microphone input
positive
MICP
Analog
Ground
Ground
3
Microphone input
negative
MICN
Analog
NC
Not connected
Ground
-
4
Analog to digital
converter
AUX_ADC0
BAT-RTC
WISMO_READY
SIM-VCC
SIM-CLK
SIM-IO
I
GND
Ground
5
Power supply for RTC
backup
I
VBATT
Power supply
Power supply
Ground
I
6
2.8V WISMO Ready
SIM power supply
SIM clock
O
O
O
I/O
O
I
VBATT
I
7
GND
Ground
8
9
NC
Not connected
Not connected
2.8V Buzzer PWM2
2.8V DC PWM 1
2.8V DC PWM 0
-
SIM data
NC
-
10
11
12
13
14
15
16
17
18
19
20
21
22
23
~SIM-RST
~RESET
SPI-IO
SIM reset
BUZZER
PWM1
O
O
O
I
input reset signal
2.8V SPI data input
2.8V SPI data output
2.8V SPI clock output
2.8V GPIO
I/O
O
O
I/O
O
O
I/O
PWM0
Power On control
signal
SPI-O
On/~OFF
CT103/TXD*
~CT105/RTS*
CT104/RXD*
~CT106/CTS*
~CT107/DSR
~CT109/DCD
~CT108/DTR
~CT125/RI
VCC_2V8
2.8V UART1: Transmit
data
SPI-CLK
GPIO3
I
2.8V UART1: Request
to send
I
2.8V SPI chip select
output
2.8V UART1: Receive
data
~SPI-CS
TX_CTRL
GPIO5
O
O
O
O
I
2.8V UART1: Clear to
send
2.8V TX Burst Indicator
2.8V GPIO
2.8V UART1: Data set
ready
Groun
d
2.8V UART1: Data
carrier detect
GND
Ground
Radio antenna
connection
2.8V UART1: Data
terminal ready
ANT
I/O
Groun
d
2.8V UART1: Ring
indicator
GND
Ground
Ground
O
O
Groun
d
2.8V power supply
from module
GND
WA_DEV_W218_PTS_002
Rev 005
Page 91 of 109
Download from Www.Somanuals.com. All Manuals Search And Download.
Product Technical Specification &
Customer Design Guidelines
*
*
UART signal names are according to PC view.
The I/O direction information only concerns the nominal signal. When the signal is configured in GPIO, it can either be
an Input or an Output.
WA_DEV_W218_PTS_002
Rev 005
Page 92 of 109
Download from Www.Somanuals.com. All Manuals Search And Download.
Product Technical Specification &
Customer Design Guidelines
Recommended Connection When Not Used
The table below gives the recommended connection for any unused pins.
Recommended
Connection when
not Used
Pin
#
Pin
#
Recommended Connection
when not Used
Signal
Signal
1
SPKP
open
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
GPIO1
open
SPKN
open
SPI-IRQ
GND
PCB test point
Ground
2
MICP
open
3
MICN
open
NC
Not connected
Ground
4
AUX_ADC0
BAT-RTC
WISMO_READY
SIM-VCC
SIM-CLK
SIM-IO
Ground
GND
5
open
VBATT
Power supply
6
open
VBATT
Power supply
7
SIM power supply
SIM clock
SIM data
SIM reset
open
GND
Ground
8
NC
Not connected
Not connected
open
9
NC
10
11
12
13
14
15
16
17
18
19
20
21
22
23
~SIM-RST
~RESET
SPI-IO
BUZZER
PWM1
open
PCB test point
PCB test point
PCB test point
open
PWM0
open
SPI-O
On/~OFF
CT103/TXD*
~CT105/RTS*
CT104/RXD*
~CT106/CTS*
~CT107/DSR
~CT109/DCD
~CT108/DTR
~CT125/RI
VCC_2V8
Power On control signal
2.8V UART1: Transmit data
Connect to ~CT106/CTS
2.8V UART1: Receive data
Connect to ~CT105/RTS*
Connect to ~CT108/DTRNote 1
open
SPI-CLK
GPIO3
~SPI-CS
TX_CTRL
GPIO5
PCB test point
not connected
open
GND
Ground
ANT
Radio antenna connection
Ground
Connect to ~CT107/DSR Note 1
open
GND
GND
Ground
open
WA_DEV_W218_PTS_002
Rev 005
Page 93 of 109
Download from Www.Somanuals.com. All Manuals Search And Download.
Product Technical Specification &
Customer Design Guidelines
Note 1: Please refer to the recommendations specified in the Pin Description sub-section regarding the connection between
DSR and DTR.
PCB Specification for Application Board
In order to save costs for simple applications, a cheap PCB structure can be used for the application
board of the WISMO218. A 4-layer through-hole type PCB structure can be used.
Figure 44. PCB Structure Example for the Application Board
Note:
Due to the limited layers of 4-layer PCBs, sensitive signals like audio, SIM and clocks cannot be
protected by 2 adjacent ground layers. As a result, during PCB layout, care must be taken for these
sensitive signals, by avoiding coupling to noisy baseband through adjacent layers.
WA_DEV_W218_PTS_002
Rev 005
Page 94 of 109
Download from Www.Somanuals.com. All Manuals Search And Download.
Product Technical Specification &
Customer Design Guidelines
Environmental Specifications
The WISMO218 is compliant with the following operating classes. The table below lists the ideal
temperature range of the environment.
Conditions
Temperature Range
Operating / Class A
Operating / Class B
Storage
-25 °C to +75°C
-40 °C to +85°C
-40 °C to +85°C
Function Status Classification
Class A
The WISMO218 remains fully functional, meeting GSM performance criteria in accordance with ETSI
requirements, across the specified temperature range.
Class B
The WISMO218 remains fully functional across the specified temperature range. Some GSM
parameters may occasionally deviate from the ETSI specified requirements and this deviation does
not affect the ability of the WISMO218 to connect to the cellular network and be fully functional, as it
does within the Class A range.
The detailed climatic and mechanics standard environmental constraints applicable to the WISMO218
are listed in the table below:
WA_DEV_W218_PTS_002
Rev 005
Page 95 of 109
Download from Www.Somanuals.com. All Manuals Search And Download.
Product Technical Specification &
Customer Design Guidelines
WISMO218
ENVIRONNEMENTAL CLASSES
TYPE OF TEST
STANDARDS
STORAGE
Class 1.2
TRANSPORTATION
OPERATING (PORT USE)
Class 2.3
Class 7.3
Cold
Dry heat
IEC 68-2.1
Ab test
-25° C
+70° C
72 h
72 h
-40° C
72 h
72 h
-20° C (GSM900)
16 h
-10° C (GSM1800/1900) 16h
IEC 68-2.2
Bb test
+70° C
+55° C
16 h
Change of temperature
IEC 68-2.14
Na/Nb test
-40° / +30° C
5 cycles
t1 = 3 h
-20° / +30° C (GSM900) 3 cycles
-10° / +30° C (GSM1800/1900):
3 cycles
t1 = 3 h
Damp heat
cyclic
IEC 68-2.30
Db test
+30° C
2 cycles
+40° C
2 cycles
+40° C
2 cycles
90% - 100% RH
90% - 100% RH
90% - 100% RH
variant 1
variant 1
variant 1
Damp heat
IEC 68-2.56
Cb test
+30° C
4 days
+40° C
4 days
+40° C
4 days
Sinusoidal vibration
IEC 68-2.6
Fc test
5 - 62 Hz
:
5 mm / s
2 m / s2
62 - 200Hz :
3 x 5 sweep cycles
5 - 20 Hz
:
0.96 m2 / s3
- 3 dB / oct
10 -12 Hz
:
0.96 m2 / s3
- 3 dB / oct
Random vibration
wide band
IEC 68-3.36
Fdb test
20 - 500Hz :
12 - 150Hz :
3 x 10 min
3 x 30 min
Figure 45. Environmental classes
WA_DEV_W218_PTS_002
Rev 005
Page 96 of 109
Download from Www.Somanuals.com. All Manuals Search And Download.
Product Technical Specification &
Customer Design Guidelines
Mechanical Specifications
Physical Characteristics
The WISMO218 has a nearly-complete self-contained shield.
Overall dimensions: 25.0 x 25.0 x 2.8 mm (excluding label thickness)
Weight: 3.8g
WA_DEV_W218_PTS_002
Rev 005
Page 97 of 109
Download from Www.Somanuals.com. All Manuals Search And Download.
Product Technical Specification &
Customer Design Guidelines
Recommended PCB Landing Pattern
Refer to document [4] Customer Process Guideline for WISMO Series.
WA_DEV_W218_PTS_002
Rev 005
Page 100 of 109
Download from Www.Somanuals.com. All Manuals Search And Download.
Product Technical Specification &
Customer Design Guidelines
6. Peripheral Devices References
General Purpose Connector
The general purpose connector is a 46-pin castellation connector with a 1.5mm pitch.
For recommendations of PCB decal on the application board, please refer to document [4] Customer
SIM Card Reader
Listed below are the recommended SIM Card Readers to use with the WISMO218.
Drawer type:
As the WISMO218 has no SIM detect feature, the CC4 and CC8 pin should be left open.
Note:
Microphone
Microphones can be obtained from the following recommended suppliers:
HOSIDEN
PANASONIC
PEIKER
Speaker
Speakers can be obtained from the following recommended suppliers:
SANYO
HOSIDEN
PRIMO
PHILIPS
Antenna Cable
Listed below are the recommended antenna cables to mount on the WISMO218:
WA_DEV_W218_PTS_002
Rev 005
Page 101 of 109
Download from Www.Somanuals.com. All Manuals Search And Download.
Product Technical Specification &
Customer Design Guidelines
7. Noises and Design
EMC Recommendations
The EMC tests have to be performed as soon as possible on the application to detect any possible
problems.
When designing a GSM terminal, make sure to take note of the following items:
Possible spurious emissions radiated by the application to the RF receiver in the receiver
band.
ESD protection is mandatory for all peripherals accessible from outside (SIM, serial link,
audio, AUX_ADC0, etc.).
EMC protection on audio input/output (filters against 900MHz emissions).
Biasing of the microphone inputs.
Length of the SIM interface lines (preferably <10cm).
Ground plane: It is recommended to have a common ground plane for analog/digital/RF
grounds.
It is recommended to use a metallic case or plastic casing with conductive paint.
Note:
The WISMO218 does not include any protection against overvoltage.
Power Supply
The power supply is one of the key issues in the design of a GSM terminal.
A weak power supply design could affect the following items in particular:
EMC performances
The emissions spectrum
Phase error and frequency error
Caution: Careful attention should be paid to the following:
Quality of the power supply: low ripple, PFM or PSM systems should be avoided (a PWM converter is
preferred).
Capacity to deliver high current peaks in a short time (pulsed radio emission).
WA_DEV_W218_PTS_002
Rev 005
Page 103 of 109
Download from Www.Somanuals.com. All Manuals Search And Download.
Product Technical Specification &
Customer Design Guidelines
8. Appendix
Standards and Recommendations
GSM ETSI, 3GPP, and GCF recommendations for Phase II.
Specification Reference
Title
3GPP TS 45.005 v5.5.0 (2002-08)
Release 5
Technical Specification Group GSM/EDGE. Radio Access Network; Radio
transmission and reception
Digital cellular telecommunications system (Phase 2+);
GSM 02.07 V8.0.0 (1999-07)
Mobile Stations (MS) features (GSM 02.07 version 8.0.0 Release 1999)
Digital cellular telecommunications system (Phase 2+);
GSM 02.60 V8.1.0 (1999-07)
GSM 03.60 V7.9.0 (2002-09)
General Packet Radio Service (GPRS); Service description, Stage 1
(GSM 02.60 version 8.1.0 Release 1999)
Technical Specification Group Services and System Aspects;
Digital cellular telecommunications system (Phase 2+); General Packet
Radio Service (GPRS); Service description; Stage 2 (Release 1998)
Technical Specification Group GERAN; Digital cellular
telecommunications system (Phase 2+); General Packet Radio Service
(GPRS); Overall description of the GPRS radio interface; Stage 2
(Release 5)
3GPP TS 43.064 V5.0.0 (2002-04)
Technical Specification Group GSM/EDGE. Radio Access Network;
Functions related to Mobile Station (MS) in idle mode and group receive
mode; (Release 1999)
3GPP TS 03.22 V8.7.0 (2002-08)
3GPP TS 03.40 V7.5.0 (2001-12)
Technical Specification Group Terminals;
Technical realization of the Short Message Service (SMS)
(Release 1998)
Technical Specification Group Terminals; Technical realization of Cell
Broadcast Service (CBS) (Release 1998)
3GPP TS 03.41 V7.4.0 (2000-09)
ETSI EN 300 903 V8.1.1 (2000-11)
Digital cellular telecommunications system (Phase 2+);
Transmission planning aspects of the speech service in the GSM
Public Land Mobile Network (PLMN) system (GSM 03.50 version 8.1.1
Release 1999)
Technical Specification Group GSM/EDGE Radio Access Network;
Mobile Station - Base Station System (MS - BSS) interface; Data Link
(DL) layer specification (Release 1999)
3GPP TS 04.06 V8.2.1 (2002-05)
Technical Specification Group Core Network;
3GPP TS 04.08 V7.18.0 (2002-09)
3GPP TS 04.10 V7.1.0 (2001-12)
Digital cellular telecommunications system (Phase 2+);
Mobile radio interface layer 3 specification (Release 1998)
Technical Specification Group Core Networks;
Mobile radio interface layer 3 Supplementary services specification;
General aspects (Release 1998)
WA_DEV_W218_PTS_002
Rev 005
Download from Www.Somanuals.com. All Manuals Search And Download.
Page 104 of 109
Product Technical Specification &
Customer Design Guidelines
Specification Reference
Title
Technical Specification Group Core Network; Digital cellular
telecommunications system (Phase 2+); Point-to-Point (PP) Short
Message Service (SMS) support on mobile radio interface
3GPP TS 04.11 V7.1.0 (2000-09)
(Release 1998)
Technical Specification Group GSM/EDGE. Radio Access Network; Radio
transmission and reception (Release 5)
3GPP TS 45.005 v5.5.0 (2002-08)
3GPP TS 45.008 V5.8.0 (2002-08)
3GPP TS 45.010 V5.1.0 (2002-08)
3GPP TS 46.010 V5.0.0 (2002-06)
Technical Specification Group GSM/EDGE
Radio Access Network; Radio subsystem link control (Release 5)
Technical Specification Group GSM/EDGE
Radio Access Network; Radio subsystem synchronization (Release 5)
Technical Specification Group Services and System Aspects;
Full rate speech; Transcoding (Release 5)
Technical Specification Group Services and System Aspects;
Full rate speech; Substitution and muting of lost frames for
full rate speech channels (Release 5)
3GPP TS 46.011 V5.0.0 (2002-06)
3GPP TS 46.012 V5.0.0 (2002-06)
3GPP TS 46.031 V5.0.0 (2002-06)
3GPP TS 46.032 V5.0.0 (2002-06)
TS 100 913V8.0.0 (1999-08)
Technical Specification Group Services and System Aspects;
Full rate speech; Comfort noise aspect for full rate speech traffic channels
(Release 5)
Technical Specification Group Services and System Aspects;
Full rate speech; Discontinuous Transmission (DTX) for full rate speech
traffic channels (Release 5)
Technical Specification Group Services and System Aspects;
Full rate speech; Voice Activity Detector (VAD) for full rate speech traffic
channels (Release 5)
Digital cellular telecommunications system (Phase 2+);
General on Terminal Adaptation Functions (TAF) for Mobile Stations (MS)
(GSM 07.01 version 8.0.0 Release 1999)
Digital cellular telecommunications system (Phase 2+);
General requirements on interworking between the Public Land Mobile
Network (PLMN) and the Integrated Services Digital Network (ISDN) or
Public Switched Telephone Network (PSTN) (GSM 09.07 version 8.0.0
Release 1999)
GSM 09.07 V8.0.0 (1999-08)
Technical Specification Group GSM/EDGE ; Radio Access
Network ;Digital cellular telecommunications system (Phase 2+);Mobile
Station (MS) conformance specification; Part 1: Conformance
specification (Release 5)
3GPP TS 51.010-1 v5.0.0 (2002-09)
3GPP TS 51.011 V5.0.0 (2001-12)
Technical Specification Group Terminals; Specification of the Subscriber
Identity Module - Mobile Equipment (SIM - ME) interface (Release 5)
Digital cellular telecommunications system (Phase 2);
ETS 300 641 (1998-03)
Specification of the 3 Volt Subscriber Identity Module - Mobile Equipment
(SIM-ME) interface (GSM 11.12 version 4.3.1)
GCF-CC V3.7.1 (2002-08)
Global Certification Forum – Certification criteria
The WISMO218 can only be used for mobile and fixed applications. The antenna(s) used for the
transmitter must be installed at a minimum distance of 20cm from all persons and must not be co-
located or operated with any other antenna or transmitter.
Users and installers must be provided with antenna installation instructions and transmitter
operating conditions for satisfying RF exposure compliance.
WA_DEV_W218_PTS_002
Rev 005
Page 105 of 109
Download from Www.Somanuals.com. All Manuals Search And Download.
Product Technical Specification &
Customer Design Guidelines
Note that when installed in portable devices, the RF exposure condition requires a separate
mandatory equipment authorization for the final device.
WA_DEV_W218_PTS_002
Rev 005
Page 106 of 109
Download from Www.Somanuals.com. All Manuals Search And Download.
Product Technical Specification &
Customer Design Guidelines
Safety Recommendations (for Information Only)
For the efficient and safe operation of your GSM application based on the WISMO218, please read the
following information carefully.
RF Safety
General
Your GSM terminal is based on the GSM standard for cellular technology. The GSM standard is
spread all over the world. It covers Europe, Asia and some parts of America and Africa. This is the
most used telecommunication standard.
Your GSM terminal is actually a low power radio transmitter and receiver. It sends out and receives
radio frequency energy. When you use your GSM application, the cellular system which handles your
calls controls both the radio frequency and the power level of your cellular modem.
Exposure to RF Energy
There has been some public concern about possible health effects from using GSM terminals.
Although research on health effects from RF energy has focused on the current RF technology for
many years, scientists have begun research regarding newer radio technologies, such as GSM. After
existing research had been reviewed, and after compliance to all applicable safety standards had been
tested, it has been concluded that the product was fit for use.
If you are concerned about exposure to RF energy there are things you can do to minimize exposure.
Obviously, limiting the duration of your calls will reduce your exposure to RF energy. In addition,
you can reduce RF exposure by operating your cellular terminal efficiently by following the
guidelines below.
Efficient Terminal Operation
For your GSM terminal to operate at the lowest power level, consistent with satisfactory call quality:
If your terminal has an extendible antenna, extend it fully. Some models allow you to place a call with
the antenna retracted. However, your GSM terminal operates more efficiently with the antenna fully
extended.
Do not hold the antenna when the terminal is « IN USE ». Holding the antenna affects call quality and
may cause the modem to operate at a higher power level than needed.
Antenna Care and Replacement
Do not use the GSM terminal with a damaged antenna. If a damaged antenna comes into contact with
the skin, a minor burn may result. Replace a damaged antenna immediately. Consult your manual to
WA_DEV_W218_PTS_002
Rev 005
Page 107 of 109
Download from Www.Somanuals.com. All Manuals Search And Download.
Product Technical Specification &
Customer Design Guidelines
see if you may change the antenna yourself. If so, use only a manufacturer-approved antenna.
Otherwise, have your antenna repaired by a qualified technician.
Use only the supplied or approved antenna. Unauthorized antennas, modifications or attachments
could damage the terminal and may contravene local RF emission regulations or invalidate type
approval.
General Safety
Driving
Check the laws and the regulations regarding the use of cellular devices in the area where you have to
drive as you always have to comply with them. When using your GSM terminal while driving,
please:
give full attention to driving,
pull off the road and park before making or answering a call if driving conditions so require.
Electronic Devices
Most electronic equipment, for example in hospitals and motor vehicles, is shielded from RF energy.
However, RF energy may affect some improperly shielded electronic equipment.
Vehicle Electronic Equipment
Check your vehicle manufacturer representative to determine if any on-board electronic equipment is
adequately shielded from RF energy.
Medical Electronic Equipment
Consult the manufacturer of any personal medical devices (such as pacemakers, hearing aids, etc...) to
determine if they are adequately shielded from external RF energy.
Turn your terminal OFF in health care facilities when any regulations posted in the area instruct you
to do so. Hospitals or health care facilities may be using RF monitoring equipment.
Aircraft
Turn your terminal OFF before boarding any aircraft.
Use it on the ground only with crew permission.
Do not use it in the air.
To prevent possible interference with aircraft systems, Federal Aviation Administration (FAA)
regulations require you to have permission from a crew member to use your terminal while the
aircraft is on the ground. To prevent interference with cellular systems, local RF regulations prohibit
using your modem while airborne.
WA_DEV_W218_PTS_002
Rev 005
Page 108 of 109
Download from Www.Somanuals.com. All Manuals Search And Download.
Product Technical Specification &
Customer Design Guidelines
Children
Do not allow children to play with your GSM terminal. It is not a toy. Children could hurt themselves
or others (by poking themselves or others in the eye with the antenna, for example). Children could
damage the modem, or make calls that increase your modem bills.
Blasting Areas
To avoid interfering with blasting operations, turn your unit OFF when in a « blasting area » or in
areas posted: « turn off two-way radio ». Construction crews often use remote control RF devices to
set off explosives.
Potentially Explosive Atmospheres
Turn your terminal OFF when in any area with a potentially explosive atmosphere. It is rare, but your
application or its accessories could generate sparks. Sparks in such areas could cause an explosion or
fire resulting in bodily injuries or even death.
Areas with a potentially explosive atmosphere are often, but not always, clearly marked. They
include fuelling areas such as petrol stations; below decks on boats; fuel or chemical transfer or
storage facilities; and areas where the air contains chemicals or particles, such as grain, dust, or metal
powders.
Do not transport or store flammable gas, liquid, or explosives in the compartment of your vehicle
which contains your terminal or accessories.
Before using your terminal in a vehicle powered by liquefied petroleum gas (such as propane or
butane) ensure that the vehicle complies with the relevant fire and safety regulations of the country in
which the vehicle is to be used.
WA_DEV_W218_PTS_002
Rev 005
Page 109 of 109
Download from Www.Somanuals.com. All Manuals Search And Download.
Download from Www.Somanuals.com. All Manuals Search And Download.
|
Sharp PDAs Smartphones El 6850 User Manual
Sharp Stereo System AN GR500H User Manual
Sonance Speaker LCR SUR Speaker User Manual
Sony Car Stereo System CDX L450V User Manual
Sony Flat Panel Television 3 298 969 611 User Manual
Sony Projector Accessories DX100 User Manual
Standard Horizon Fish Finder Gx5500s User Manual
Sterling Plumbing Hot Tub 61040116 User Manual
Sub Zero Freezer BI 36F F User Manual
Swisher Lawn Mower WB800 42F User Manual