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9
User’s Guide
December 2001
Mixed Signal Products
SCAU003
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EVM IMPORTANT NOTICE
Texas Instruments (TI) provides the enclosed product(s) under the following conditions:
This evaluation kit being sold by TI is intended for use for ENGINEERING
DEVELOPMENT OR EVALUATION PURPOSES ONLY and is not considered by TI to
befitforcommercialuse. Assuch, thegoodsbeingprovidedmaynotbecompleteinterms
of required design-, marketing-, and/or manufacturing-related protective considerations,
including product safety measures typically found in the end product incorporating the
goods. As a prototype, this product does not fall within the scope of the European Union
directive on electromagnetic compatibility and therefore may not meet the technical
requirements of the directive.
Should this evaluation kit not meet the specifications indicated in the EVM User’s Guide,
the kit may be returned within 30 days from the date of delivery for a full refund. THE
FOREGOING WARRANTY IS THE EXCLUSIVE WARRANTY MADE BY SELLER TO
BUYER AND IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESSED, IMPLIED, OR
STATUTORY, INCLUDING ANY WARRANTY OF MERCHANTABILITY OR FITNESS
FOR ANY PARTICULAR PURPOSE.
The user assumes all responsibility and liability for proper and safe handling of the goods.
Further, the user indemnifies TI from all claims arising from the handling or use of the
goods. Please be aware that the products received may not be regulatory compliant or
agency certified (FCC, UL, CE, etc.). Due to the open construction of the product, it is
the user’s responsibility to take any and all appropriate precautions with regard to
electrostatic discharge.
EXCEPT TO THE EXTENT OF THE INDEMNITY SET FORTH ABOVE, NEITHER
PARTY SHALL BE LIABLE TO THE OTHER FOR ANY INDIRECT, SPECIAL,
INCIDENTAL, OR CONSEQUENTIAL DAMAGES.
TI currently deals with a variety of customers for products, and therefore our arrangement
with the user is not exclusive.
TI assumes no liability for applications assistance, customer product design,
software performance, or infringement of patents or services described herein.
Please read the EVM User’s Guide and, specifically, the EVM Warnings and Restrictions
notice in the EVM User’s Guide prior to handling the product. This notice contains
important safety information about temperatures and voltages. For further safety
concerns, please contact the TI application engineer.
Personshandlingtheproductmusthaveelectronicstrainingandobservegoodlaboratory
practice standards.
No license is granted under any patent right or other intellectual property right of TI
covering or relating to any machine, process, or combination in which such TI products
or services might be or are used.
Mailing Address:
Texas Instruments
Post Office Box 655303
Dallas, Texas 75265
Copyright 2001, Texas Instruments Incorporated
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EVM WARNINGS AND RESTRICTIONS
It is important to operate this EVM within the specified input and output ranges described in
the EVM User’s Guide.
Exceeding the specified input range may cause unexpected operation and/or irreversible
damage to the EVM. If there are questions concerning the input range, please contact a TI
field representative prior to connecting the input power.
Applyingloadsoutsideofthespecifiedoutputrangemayresultinunintendedoperationand/or
possible permanent damage to the EVM. Please consult the EVM User’s Guide prior to
connecting any load to the EVM output. If there is uncertainty as to the load specification,
please contact a TI field representative.
During normal operation, some circuit components may have case temperatures greater than
60°C. The EVM is designed to operate properly with certain components above 60°C as long
as the input and output ranges are maintained. These components include but are not limited
tolinearregulators, switchingtransistors, passtransistors, andcurrentsenseresistors. These
types of devices can be identified using the EVM schematic located in the EVM User’s Guide.
When placing measurement probes near these devices during operation, please be aware
that these devices may be very warm to the touch.
Mailing Address:
Texas Instruments
Post Office Box 655303
Dallas, Texas 75265
Copyright 2001, Texas Instruments Incorporated
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Preface
Read This First
How to Use This Manual
This document contains the following chapters:
- Chapter 1 – Introduction
- Chapter 2 – Hardware Overview
- Chapter 3 – EVM Operation
- Chapter 4 – Bill of Materials
- Chapter 5 – EVM Layout
Related Documentation From Texas Instruments
TPS2149 3.3-V LDO and Dual Switch data sheet, literature number SLVS401
TUSB2136 USB Keyboard Hub Controller data sheet, literature number
SLLS442
FCC Warning
Thisequipmentisintendedforuseinalaboratorytestenvironmentonly. Itgen-
erates, uses, and can radiate radio frequency energy and has not been tested
for compliance with the limits of computing devices pursuant to subpart J of
part 15 of FCC rules, which are designed to provide reasonable protection
against radio frequency interference. Operation of this equipment in other en-
vironments may cause interference with radio communications, in which case
the user at his own expense will be required to take whatever measures may
be required to correct this interference.
v
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vi
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Contents
1
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
1.1
Required Hardware and Software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
2
3
Hardware Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
EVM Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
3.1
3.2
3.3
3.4
3.5
3.6
Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
Interfaces and USB Ports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
Power Supplies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
Light Emitting Diodes (LEDs) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
Jumpers and Test Points . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3
EEPROM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3
4
5
Bill of Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
EVM Layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1
Figures
1–1
USB Keyboard/Hub EVM Hardware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Tables
3–1
3–2
3–3
4–1
4–2
LED Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
Jumpers and Test Points . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3
QWERTY Keyboard Matrix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3
EVM Bill of Materials for Edge Number 6436539 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
EVM Bill of Materials for Edge Number 6436540 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2
vii
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viii
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Chapter 1
Introduction
This user’s guide describes the setup and operation of the USB keyboard/hub
evaluation module (EVM). Information and instruction presented throughout
this document assumes user familiarity with universal serial bus (USB)
protocol and the use of common lab testing equipment.
Additional information about this EVM can be found at:
Topic
Page
1.1 Required Hardware and Software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
1-1
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Required Hardware and Software
1.1 Required Hardware and Software
The USB keyboard/hub EVM is designed for use with a personal computer
running a USB-enabled operating system. The PC, with BIOS, chipsets, and
operating system, should be USB 1.1 or 2.0 specification-compliant. If the
BIOS is not compliant, the system may not boot when USB devices are
connected at power up, and the EVM may not function. Additionally, one or
more low- or full-speed USB devices are needed to plug into the downstream
portsoftheUSBkeyboard/hubEVMtoexercisethehubports. AstandardUSB
cable is needed to connect the USB keyboard/hub EVM to a downstream port
of the PC or a USB hub tier.
Figure 1–1. USB Keyboard/Hub EVM Hardware
USB EVM
1-2
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Chapter 2
Hardware Overview
The USB keyboard/hub EVM features the TUSB2136 and the TPS2149 made
by Texas Instruments. The EVM is a two-board set made up of a stand alone
two-port hub (edge #6436539) and a miniature QWERTY keyboard (edge
#6436540). Jumpers (0-Ω resistors) and jumper blocks provided on the EVM
areinstalledwiththefactorysettings. ThesettingsaredescribedinTable 3–2.
Review all setting changes prior to powering the EVM. Improper settings could
result in damage to some of the EVM components. The factory settings allow
2
the EVM to operate using a 12-MHz crystal along with an I C EEPROM. The
EVM has also been configured to work only in bus-powered mode. The
firmware installed at the factory and stored in the EEPROM allows the EVM
to function as a two port keyboard hub. Users are responsible for developing
their own application firmware for the target hardware device.
The EVM uses a TUSB2136, USB keyboard/hub controller, made by Texas
Instruments, to communicate with the host and the downstream devices. A
USB cable is needed to connect the root hub of the PC to the EVM type B
connector (J5). The downstream devices connect to the EVM via the J6 and
J7 connectors. These downstream devices are powered through the
TPS2149, a power management device that integrates an LDO and two power
switches into one small package. The LDO is used to provide power to the
TUSB2136. The USB specification requires that downstream ports remain off
until enumeration is complete. Together, the TUSB2136 and the TPS2149
ensure the hub meets this requirement. Two other connectors, J3 and J4,
allow easy connection to the TUSB2136 general-purpose I/O lines. These
lines are used to implement the keyboard function. The miniature QWERTY
keyboardplugsdirectlyintoJ3andJ4toimplementafullyfunctionalkeyboard.
Jumpers, test points, and LEDs have been added for testing, troubleshooting
and debugging purposes. There are test points on the differential pair lines of
the upstream B-type connector and the two downstream A-type connectors.
2
The I C port can be probed directly on the EEPROM. Six LEDs are provided
for quick feedback during firmware debugging or as status information. One
LED (D1) is fixed to provide power and suspend status of the TUSB2136
device. An RS–232 port is available for monitoring 8052 MCU activity. The port
uses a one-to-one cable and not a null-modem cable.
2-1
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2-2
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Chapter 3
EVM Operation
Operation of the USB keyboard/hub EVM is summarized in this chapter.
Topic
Page
3.1 Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
3.2 Interfaces and USB Ports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
3.3 Power Supplies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
3.4 Light-Emitting Diodes (LEDs) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
3.5 Jumpers and Test Points . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3
3.6 EEPROM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3
3-1
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Setup
3.1 Setup
The USB keyboard/hub EVM is designed to allow evaluation of the TUSB2136
and the TPS2149 device. Test points and 0-Ω resistors are provided to simplify
the evaluation process (see section 3.5). The EVM comes in a default
configuration that requires no additional components, other than the required
hardware and software identified in Section 1.1 of this user’s guide. For a
complete description of the TUSB2136 and the TPS2149 devices, consult the
TUSB2136 and the TPS2149 data sheets (literature numbers SLLS442 and
SLVS401, respectively).
3.2 Interfaces and USB Ports
The EVM uses a standard Type-B connector for the upstream port and two
single Type-A connectors for the downstream ports. Power to the downstream
ports is provided from the upstream USB 5-V source through the TPS2149.
Two edge connectors, J3 and J4, connect to the TUSB2136 general-purpose
I/O lines. Out of 32 general-purpose I/O lines, 26 are brought out to the J3 and
J4 connectors. The remaining 6 I/O lines are used onboard to control theLEDs
(see Light Emitting Diodes (LEDs) in this chapter).
3.3 Power Supplies
The USB keyboard/hub EVM requires no external power supply for operation.
The EVM receives power via the upstream USB cable. The USB 5-V source
is limited by the USB specification to 500 mA max. The TPS2149 low-dropout
regulator is used to generate the required 3.3-V supply from the USB 5-V
supply. The power indicator LED (D1) turns on whenever power is available
to the EVM (see Table 3–1).
3.4 Light Emitting Diodes (LEDs)
SeveralonboardLEDsareprovidedontheEVMforquickandeasyevaluation.
A set of six green LEDs (D2 – D7), connected to P3.0 through P3.5 of the
TUSB2136, may be used for general purposes in any code that is written for
the TUSB2136 (see Table 3–1). By default, the factory code provides the EVM
with the use of only three of the LEDs as keyboard status indicators for Scroll
Lock (D2), Caps Lock (D3), and Num Lock (D4). The other three are not used.
Table 3–1.LED Description
LED
Description
D2–D7
Green LED ON indicates corresponding GPIO pin is low (when D1 is ON).
Green LED OFF indicates corresponding GPIO pin is high (when D1 is ON).
D1
Red LED ON indicates that the EVM is powered on and not suspended.
Red LED OFF indicates that the EVM is powered off or suspended.
3-2
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Jumpers and Test Points
3.5 Jumpers and Test Points
Table 3–2 describes the jumpers J1 and J2, used to connect P3.0 and P3.1
to D6 and D7 respectively, which should only be done when P3.0/S0 and
P3.1/S1 are not set to GND for VID/PID selection (see the TUSB2136
keyboard hub controller data sheet, literature number SLLS442) via SW1–3
and SW1–4.
Table 3–2 also describes the various 0-Ω resistors used as jumpers. Test
points are located throughout the EVM. For location of these test points, see
the EVM Layout section of this user’s guide.
Table 3–2.Jumpers and Test Points
Jumpers
J1
Description
Connects P3.1 to D7
J2
Connects P3.0 to D6
J9
Connects the serial data line of the EEPROM to the TUSB2136. Installed at factory.
Connects power to the RS232 interface chip
J10
J11, J12
Connects the transmit and receive lines on the RS232 interface chip to the TUSB2136
A set of six switches used to configure the TUSB2136. For proper operation with the
firmware and EVM, SW1–3, SW1–5, and SW1–6 should be set to on.
SW1
R29, R36, R37, R38 0-Ω resistors on power lines which may be removed to insert a current meter
3.6 EEPROM
The EEPROM is used for application-specific firmware. The TUSB2136
2
automatically reads the EEPROM at power up via the I C bus. A header must
be added to the application firmware before loading into the EEPROM. This
header format is specified in the bootcode document (literature number
SLLU025), which can be found on the EVM web page at
2
the I C header generation utility software also found on the EVM website
For convenience, the EEPROM has been installed on a socket. If desired, the
socket may be removed and the EEPROM can be soldered directly onto the
board. The firmware installed at the factory supports the miniature QWERTY
keyboard with the matrix shown in Table 3–3. The miniature QWERTY
keyboard connects to J3 and J4.
EVM Operation
3-3
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EEPROM
Table 3–3.QWERTY Keyboard Matrix
Port
No.
P3.6
P0.6
P0.7
P0.4
P0.5
P0.2
COL 6
P0.3
COL 7
P0.0
P0.1
P1.6
Matrix
COL 1 COL 2 COL 3 COL 4 COL 5
COL 8 COL 9 COL 10
P2.7 ROW 1
P2.6 ROW 2
P2.5 ROW 3
P2.4 ROW 4
P2.3 ROW 5
P2.2 ROW 6
P2.1 ROW 7
P2.0 ROW 8
Q
W
E
9
8
A
S
D
F
G
H
J
6
Z
X
C
V
B
N
M
3
DEL
0
5
2
7
4
1
END
/
INS
R
T
ESC
I
HOME
R ARROW
SPACE
K
“
Y
P
U ARROW D ARROW
U
O
–
L
+
\
L ARROW
.
,
ENTER
SHIFT
ALT
CTL
3-4
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EVM Operation
3-5
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Chapter 4
Bill of Materials
This chapter contains the EVM bill of materials for edge number 6436539 and
edge number 6436540.
Table 4–1.EVM Bill of Materials for Edge Number 6436539
RefDes
Description
Size
MFR
Part Number
QTY
2
C1, C2
Capacitor, ceramic, 33 pF, 16 V,
[temp], 5%
805
MuRata
GRM39C0G330J100V
3
9
C3, C4, C25
Capacitor, tantalum, 4.7 µF, 10 V,
zz mΩ, 20%
3528
805
Panasonic
Kemet
293D475X0010B2T
C5, C11 – C14,
Capacitor, ceramic, 0.1 µF, 50 V,
C0805C104K5RAC7800
C17 – C20
X7R,10%
4
2
4
C7 – C10
C15, C16
C21 – C24
Capacitor, ceramic, 22 pF, 50 V, 5%
805
Murata
NEMCO
Murata
GRM39C0G220J50V
LSR10016DK125
Capacitor, POSCAP, 100 µF, 16 V
7343 (D)
805
Capacitor, ceramic, 1 µF, 50 V, X7R,
GRM40X7R105K16PT
10%
1
6
4
D1
Diode, LED, red, 2.1 V, 14.2 mcd,
20 mA
805
805
Liteon
Liteon
LTST–C170UKT
LTST–C170FKT
SMB20
D2 – D7
FB1 – FB4
Diode, LED, green, 2.1 V, 14.2 mcd,
20 mA
SMB20 surface ferrite mount bead
Allied Com-
ponents
6
2
1
2
J1, J2, J9 – J12
Header, 2-pin, 100mil spacing
PTC36SAAN
J3, J4
J5
Header, 2 x 7 RT ANG. pin, 100mil
Connector, USB upstream (Type B)
Samtec
Molex
SSW–107–02–T–D–RA
AU–Y1007
J6, J7
Connector, USB downstream (Type
A)
AU–Y–1005
1
1
8
4
J8
Connector, 9-pin D, right angle, male
Bipolar, PNP, 40 V, 350 mA, zz W
Resistor, chip, 510 Ω, 1/10 W, 5%
Resistor, chip,15 kΩ, 1/10 W, 5%
AMP
On Semi
Std
747250–4
MMBT3904LT1
Std
Q1
SOT23
805
R1 – R8
R9, R12 – R14
805
Std
Std
4-1
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Table 4–1.EVM Bill of Materials for Edge Number 6436539 (Continued)
QTY
RefDes
Description
Size
MFR
Part Number
6
R10, R11, R18,
R19, R22, R26
Resistor, chip, 30 Ω, 1/10 W, 5%
805
Std
Std
3
R15, R17, R30
Resistor, chip, 1 kΩ, 1/10 W, 5%
805
Std
Std
2
2
1
1
2
1
1
4
R20, R21
R16, R23
R24
Resistor, chip, 20 kΩ, 1/10 W,5%
Resistor, chip, 200 kΩ, 1/10 W, 5%
Resistor, chip, 10 Ω, 1/10 W, 5%
Resistor, chip, 1.5 kΩ, 1/10 W, 5%
Resistor, chip, 30.1 kΩ, 1/10 W,1%
Resistor, chip, 100 kΩ, 1/10 W, 5%
Resistor, chip, 90 kΩ, 1/10 W, 5%
Resistor, chip, 0 Ω, 1/10 W, 5%
805
805
805
805
805
805
805
805
Std
Std
Std
Std
Std
Std
Std
Std
Std
Std
Std
Std
Std
Std
Std
Std
R25
R27, R28
R31
R32
R29, R36, R37,
R38
1
1
S1
Switch, 1P1T, 20 mA, 15 V
Panasonic
EVQ–PAD04M
SW1
Switch, 6 POS, SPST, low profile,
SMT, 0.5 inch centers
CTS Corp. CTS Corp.
1
TP14
Test point, black, 1 mm
Test point, red, 1 mm
Farnell
Farnell
240–333
20
TP1, TP2, TP7 –
TP13, TP15 –
TP25
240–345
1
1
1
U1
U3
U4
3.3-V LDO and dual switch
DGN8
SO16
TI
TI
TI
TPS2149
IC, dual EIA–232, driver/receiver
MAX232ID
TUSB2136PM
IC, 2 port USB hub w/Funcontr, 64
pin S–PQFP–G64 Pkg
1
1
X1
Crystal, 12 MHz, 20 pF, ±50 PPM
@ 25°C
Crytek
16695
XU1
Socket, 8-pin DIP
110–99–308–41–001
Table 4–2.EVM Bill of Materials For fdge Number 6436540
RefDes
Description
Size
MFR
Part Number
QTY
2
J1, J2
Header, 2 x 7 RT. ANG. pin 100mil
Resistor, chip, 511 Ω, 1/10 W 5%
18
R39 – R45,
R48, R49,
R50, R57,
R58, R61 –
R66
R0805
Std
Std
57
0 – 56
Switch, 1P1T, 20 mA, 15 V
Panasonic
EVQ–PAD04M
4-2
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Chapter 5
EVM Layout
This chapter contains the EVM layout and schematics for edge number
6436539 and 6436540.
5-1
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|