Blue Heat/Net Sync
User Manual
Ethernet-to-Serial Synchronous Communications
Connect Tech Inc.
42 Arrow Road
Guelph, Ontario
N1K 1S6
Tel:
519-836-1291
Toll:
Fax:
800-426-8979 (North America only)
519-836-4878
Email: sales@connecttech.com
Web: www.connecttech.com
CTIM-00044 Revision 0.03 , July 8, 2010
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Connect Tech Blue Heat/Net Sync User Manual
Customer Support Overview
If you experience difficulties after reading the manual and/or using the product, contact the
Connect Tech reseller from which you purchased the product. In most cases the reseller can help
you with product installation and difficulties.
In the event that the reseller is unable to resolve your problem, our highly qualified support staff
can assist you. Our support section is available 24 hours a day, seven days a week on our
website at:
more information on how to contact us directly. Our technical support is always free.
Contact Information
We offer three ways for you to contact us:
Telephone/Facsimile
Technical Support representatives are ready to answer your call Monday through Friday, from
8:30 a.m. to 5:00 p.m. Eastern Standard Time. Our numbers for calls are:
Telephone:
Telephone:
800-426-8979 (North America only)
519-836-1291 (Live assistance available 8:30 a.m. to 5:00 p.m. EST, Monday to
Friday)
Facsimile:
519-836-4878 (online 24 hours)
Email/Internet
You may contact us through the Internet. Our email and URL addresses are:
Mail/Courier
You may contact us by letter and our mailing address for correspondence is:
Connect Tech Inc.
Technical Support
42 Arrow Road
Guelph, Ontario
Canada N1K 1S6
Note:
Support Center on the Connect Tech website for product
manuals, installation guides, device driver software and
technical tips.
Center on the Connect Tech website.
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Connect Tech Blue Heat/Net Sync User Manual
Certification Statements
Preliminary: Testing is still pending.
Class A Computing Device
Connect Tech Inc. declares that the product(s) covered by the contents of this manual have been
tested and found compliant with the below listed standards as required by the Electromagnetic
Compatibility (EMC) Directive for General Immunity Compliance.
EN 55022
CISPR 22
Conducted and Radiated emissions
Class A
EN 55024
Immunity to Disturbances
EN 61000-4-2
EN 61000-4-3
EN 61000-4-4
EN 61000-4-5
EN 61000-4-6
EN 61000-4-11
EN 61000-3-2 Exempt
EN 61000-3-3 Pass
The above satisfy the requirements of:
USA:
FCC – CFR47, Part 15, part 2
Canada:
Europe
Japan:
ICES-003
EMC Directive
VCCI
Australia/New Zealand:
AS/NZS
Preliminary: Testing is still pending.
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Table of Contents
Limited Lifetime Warranty...................................................................................................................2
Copyright Notice ................................................................................................................................2
Trademark Acknowledgment................................................................................................................2
Customer Support Overview ................................................................................................................3
Contact Information............................................................................................................................3
Certification Statements ......................................................................................................................4
Table of Contents ...............................................................................................................................5
List of Figures....................................................................................................................................7
List of Tables .....................................................................................................................................8
Introduction.......................................................................................................................................9
Features ..................................................................................................................9
Understanding Virtual COM Ports ...........................................................................10
Blue Heat/Net Sync Installation Overview...........................................................................................10
Hardware Installation.......................................................................................................................11
Connecting the Blue Heat/Net Sync to Your Network:.................................................11
Ethernet LEDs ...............................................................................................11
Serial Port LEDs............................................................................................12
Connecting Serial Devices .......................................................................................12
V.28 Connections:..........................................................................................12
RS-422/V.11 Connections................................................................................13
Blue Heat/Net Synchronous Clocking........................................................................13
Loopback Connectors..............................................................................................14
Connecting Power ..................................................................................................15
Selecting a Special Operation..........................................................................17
Power On Diagnostics: ...........................................................................................18
LED Error Codes...........................................................................................18
SCM Cabling requirements......................................................................................21
Setting a Static or Dynamic IP Address.....................................................................21
Blue Heat/Net Sync Configuration......................................................................................................23
CDS (Configuration Data Space) .............................................................................24
Description....................................................................................................24
Access to CDS Parameters..............................................................................24
SCM (Serial Configuration Manager) .......................................................................25
Description....................................................................................................25
Getting Access to the SCM ..............................................................................25
SCM Command Reference...............................................................................25
cfg...............................................................................................26
exit ..............................................................................................27
help .............................................................................................27
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info..............................................................................................27
net...............................................................................................27
WCM (Web Configuration Manager)........................................................................31
Restore Defaults....................................................................................35
Saving To Flash.....................................................................................36
Monitoring Your Blue Heat/Net .......................................................................37
Software Installation for Windows......................................................................................................40
Installing the Blue Heat/Net Sync Configuration Manager ..........................................40
Running the Configuration Manager.........................................................................44
Device Installation..................................................................................................44
Configure Default Blue Heat/Net Sync..............................................................45
Add New Blue Heat/Net Sync...........................................................................45
Auto Discover Blue Heat/Net Sync ...................................................................46
Firmware Upgrades..........................................................................................................................47
Software Development ......................................................................................................................48
IUSC Access: ........................................................................................50
PLD Memory Map Table.................................................................................51
Port Settings, Clock Setup and General Settings.........................................................59
IUSC Clocking Logic: .............................................................................................61
Appendix .........................................................................................................................................62
Blue Heat/Net Sync Specifications ............................................................................62
Operating Environment ..................................................................................62
Communications ............................................................................................62
ESD Protection..............................................................................................62
Power ...........................................................................................................62
Connectors....................................................................................................62
Dimensions....................................................................................................62
Cable and Power Supply Options.....................................................................62
Protocol Descriptions.....................................................................................63
Pinouts ..................................................................................................................64
DB-25 Female Pinouts....................................................................................64
DB-9 Female Pinouts .....................................................................................65
Rack Mount Option:................................................................................................66
Default Settings ......................................................................................................67
Network Settings ............................................................................................67
Boot Settings..................................................................................................67
SCM Operation Settings..................................................................................67
Common Configuration Setups.................................................................................68
Static IP Setup ...............................................................................................68
Using SCM ...........................................................................................68
Using WCM ..........................................................................................68
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DHCP Setup..................................................................................................69
Using SCM ...........................................................................................69
How the Blue Heat/Net Sync Boots Up......................................................................69
Bootup Sequence............................................................................................70
Serial Line Interface Tutorial...................................................................................72
RS-232 Line Interface:....................................................................................72
Differential Line Interfaces: ............................................................................72
RS485/RS422/V.11 Details..............................................................................72
List of Figures
Figure 10: Phoenix Locking Screw Terminal Power Connector Illustration................................15
Figure 11: LED Error Code Example...........................................................................................18
Figure 16: Firmware Upgrades/Downloads.................................................................................35
Figure 22: My Blue Heat/Net Sync Hardware Details..................................................................39
Figure 29: Auto Discover Blue Heat/Net Sync Screen..................................................................46
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List of Tables
Table 2: Connector Properties......................................................................................................16
Table 5: Chip Selects....................................................................................................................48
Table 9: DB-25 Female Pinouts....................................................................................................64
Table 10: DB-9 Female Pinouts....................................................................................................65
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Introduction
Connect Tech‟s Blue Heat/Net Sync allows remote access to synchronous/asynchronous serial
devices via an Ethernet LAN or the Internet. Blue Heat/Net Sync network-enables serial
communication devices that are designed to be connected to serial ports so that the devices no
longer need to be tied to a single computer.
The Blue Heat/Net Sync hardware is simple to install as it involves little more than plugging the
unit into the appropriate locations and performing the configuration steps outlined in this
manual.
Driver setup is made easy by Blue Heat/Net Sync‟s auto-detection feature. The software does the
work of locating the units, while the Configuration Manager leads you through the rest of the
installation.
Blue Heat/Net Sync‟s firmware is easily configured with a choice of methods: web browser,
Telnet, or direct serial connection with a terminal and/or terminal software. Once the Blue
Heat/Net Sync has been configured to your specifications, you will be able to remotely access
your devices immediately.
Features
●
Four software selectable synchronous or asynchronous serial ports
Software switchable; V.28, V.10, V.11, V.35, EIA-530, X.21 line modes
Software switchable line modes and termination
Supports NRZ, NRZB, NRZI-Mark, NRZI-Space, B-Phase-Space, B-Phase-Manchester,
Differential Bi-Phase encoding
●
●
●
●
Transmission rates up to 9.216 Mbps (synchronous), 230.4 Kbps (asynchronous). 10 Mbps
communications possible with external clock.
●
●
●
Bipolar clock input accepts sine/square wave signals up to 20 MHz +/- 10V.
Includes synchronous protocols; SDLC, HDLC, MonoSync, BiSync, Transparent BiSync
Software selectable internal and external clocking modes. External clocking is provided on
TXC and RXC pins
●
●
Supports IP, TCP, UDP, ARP, RARP, TFTP, DHCP, BOOTP, HTTP, Telnet and DNS
Use of TCP/IP means communications can be routed to support WANs, as well as LANs.
The Blue Heat/Net Sync does not need to be located at the same site as the controlling
computer
●
●
Raw TCP server (HDLC and External Sync Line Modes only)
Several levels of security are built into the Blue Heat/Net Sync that can limit connections
and help to ensure the privacy of data flow
●
●
●
●
●
Memory: 8 MB flash, 16 MB SDRAM
Includes an auto-MDIX 10Base-T, 100Base-TX LAN interface
Network boot or booting from built-in flash memory
Firmware upgrades are downloadable
Customizable uClinux embedded operating system running on a ColdFire embedded
processor.
●
●
●
Configuration can be done via Web Browser, Telnet or direct serial connection
Front mounted diagnostic LEDs
5-28 VDC power input using either DC barrel or Phoenix screw terminal connector
Optional 5VDC power supply available
●
1U rack mount kit available
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Understanding Virtual COM Ports
In a typical serial port setup, the application communicates directly with the connected serial
port hardware.
Virtual COM ports differ in that the application communicates with a network protocol layer that
transfers the necessary information to and from the remote serial ports. The virtual ports appear
as standard serial ports to the application, but in reality the data is translated into a series of
Ethernet messages between the Blue Heat/Net Sync unit and the host computer. The serial port is
not physically connected to the host computer, but this is transparent to the application trying to
access it.
There are several advantages to using virtual COM ports, which include:
Distance – The serial ports can be a great distance away from the host computer. They are
not limited by the standard electrical characteristics of the RS-232 or RS-422 interface
because the primary data transfer is being done via Ethernet. Depending on the set up, these
serial ports can be at a different location and the Internet can act as the carrier of the serial
port traffic.
Speed – Short RS-232/422 cable lengths can be used with the primary distance relying on
the network connection. The capacitance of long lengths of serial cable does not limit data
speeds in these cases.
Cabling – Cost effective Ethernet cabling can be used for the transfer of information to the
Blue Heat/Net Sync and often this is part of the existing networking infrastructure.
Connecting serial ports in a remote location can be as easy as plugging in a Blue Heat/Net
Sync to the Ethernet network. This provides a simple, clean cabling arrangement.
Port Sharing – In some applications it is desirable to have a serial resource that is accessed
and shared by more than one host computer. Connect Tech‟s virtual serial port technology
allows this to be done easily.
Routing – Different ports on a Blue Heat/Net Sync can be connected to multiple host
computers.
Monitoring – Because the virtual serial ports are on the network, they can easily be
monitored to ensure everything is operating correctly.
Blue Heat/Net Sync Installation Overview
There are three main stages in the installation process for your Blue Heat/Net Sync.
1.
This involves the physical connection of the Blue Heat/Net Sync hardware to your
network, and addresses issues such as cabling and power requirements.
2.
The first step in the configuration process is to set the IP Address. Then use one of three
available methods to configure the Blue Heat/Net Sync firmware settings for your
preference.
3.
This step installs and configures the Blue Heat/Net Sync drivers and ports for your host
Operating System and allows you to set parameters specific to your serial requirements.
This is done via the Blue Heat/Net Sync Configuration Manager.
NOTE: Software support for Windows and Linux is still in
development
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Hardware Installation
Connecting the Blue Heat/Net Sync to Your Network:
Before you begin, take a minute to ensure that your package includes the required components
for your Blue Heat/Net Sync:
One Blue Heat/Net Sync unit
•
•
•
•
•
One power supply
One CD containing software and documentation
One Phoenix contact screw terminal plug PN: 1847055
One RJ-45 cable (optional)
Ethernet LEDs
The front panel of the Blue Heat/Net Sync features Ethernet and serial port LEDs to monitor
activity.
Power: When this LED is on, the Blue Heat/Net Sync is receiving power.
CPU: Once the uClinux firmware is booted and running correctly, this LED lights up.
10/100: This LED represents the line rate at which the Blue Heat/Net Sync is connected
to your network.
LED on = a 100 megabit connection.
LED off = a 10 megabit connection.
(The Blue Heat/Net Sync automatically detects the line rate of your network).
L/A:
This light illuminates when the connection to your network or computer is
achieved.
A blinking light indicates that Transmit (Tx) or Receive (Rx) activity is detected
on the Ethernet cable.
FD:
Indicates that your network is running in full duplex or half duplex mode:
ON = full duplex, OFF = half duplex
Figure 1: LED Locations on Blue Heat/Net Sync
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Serial Port LEDs
The serial ports LEDs indicate serial activity for each port.
A flashing LED indicates that the port in question is receiving or transmitting data.
•
Connecting Serial Devices
V.28 Connections:
V.28 has signaling levels the same EIA RS232.
Basic Async (V.28) RS-232 Null Modem Connection
This is the typical way to connect a Blue Heat/Net Sync to another serial device.
Blue Heat/Net Sync
RS-232 Device
RX
TX
SR
2 - TX
3 - RX
7 - SR
Figure 2: Basic V.28 Asynchronous Connections
Basic Sync (V.28) RS-232 Connection (Provides Clock)
Blue Heat/Net Sync
RS-232 Device
2 - TX
RX
3 - RX
TX
17 - T/RXC
7 - SR
RXC
SR
Figure 3: Basic V.28 Synchronous Connections
Basic Sync (V.28) RS-232 Connection (Receives Clock)
Blue Heat/Net Sync
RS-232 Device
2 - TX
RX
3 - RX
TX
15 - T/RXC
7 - SR
RXC
SR
Figure 4: Basic V.28 Synchronous Connections
NOTE: The Blue Heat/Net Sync clock signals are bidirectional.
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RS-422/V.11 Connections
The following are basic connections that can be accomplished when the I/O levels are in V.11 (RS-
422) mode. V.11 mode signaling can be enabled with EIA-530, RS-449 or X.21 modes on your Blue
Heat/Net Sync.
RS-422/V.11 Device
Blue Heat/Net Sync
2 - TX-
RX-
RX+
TX+
TX-
SR
14 - TX+
16 - RX+
3 - RX-
7 - SR
Figure 5: Basic RS-422/V.11 Asynchronous Connections
RS-422/V.11 Device
Blue Heat/Net Sync
2 - TX-
RX-
RX+
TX+
TX-
14 - TX+
16 - RX+
3 - RX-
9 - R/TXC+
17 - R/TXC-
7 - SR
RXC
RXC
SR
Figure 6: Basic RS422/V.11 Synchronous Connections
NOTE: Blue Heat/Net Sync clock signals are bidirectional. The
Heat/Net Sync Clocking for more details.
Blue Heat/Net Synchronous Clocking
The clocking circuits on the Blue Heat/Net Sync are very flexible. The Blue Heat/Net Sync DB-25 clock
pins are bi-directional. This means that the TXC or RXC pins can be inputs receiving a clock or outputs
driving a clock. Functionally the two pins are equal. For example, the following clocking combinations are
possible:
RXC as clock input and TXC as clock input.
RXC as clock output and TXC as clock output.
RXC as clock input and TXC as clock output.
RXC as clock output and TXC as clock input.
The Blue Heat/Net Sync receivers and transmitters can be clocked independently from any combination of
the above or from internal clock sources.
Clocking is also available from the EXT_REF_CLK input pin on the DB-9 female.
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Loopback Connectors
Loopback connectors are useful for performing diagnostics. The following figure illustrates the
recommended pinouts for creating loopback connectors for Blue Heat/Net Sync.
DB-25 Male
2 - TX
3 - RX
4 - RTS
5 - CTS
6 -DSR
8 - DCD
20 - DTR
22 - RI
15 - TXC
17 - RXC
Figure 7: Recommended Pinouts for V.28 (RS-232) Loopback Connector
DB-25 Male
2 - TX-
14 - TX+
16 - RX+
3 - RX-
9 - RXC+
17 - RXC-
11 - TXC+
12 - TXC-
7 - SR
Figure 8: Recommended Pinouts for a V.11 (RS422) Loopback Connector
NOTES:
1. For an asynchronous loopback, omit the TXC and RXC pin.
2. When using clock signals, one signal must be configured as an
input, while the other must be configured as an output.
3. When using a DB-25 female loopback connector, solder cup
DB-25 connectors and 24 AWG solid core wire, such as wire
from a CAT5 cable is recommended.
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Connecting Power
The Blue Heat/Net Sync uses either a standard DC power jack or a Phoenix locking screw
terminal connector for power input. The Blue Heat/Net Sync can be safely connected or
disconnected at any time. The standard power supply requirements are as follows:
Model BMG006
5V (2.5A) power input using a DC barrel or Phoenix screw terminal connector. Rev A
models.
5V (2.5A) – 28 V DC (450mA) power input using a DC barrel or Phoenix screw terminal
connector. Rev B or greater models only.
DC Power Connector
Figure 9: DC Power Connector Illustration
NOTE: The center is positive, outside is ground (0V).
Phoenix Locking Screw Terminal Connector
Figure 10: Phoenix Locking Screw Terminal Power Connector Illustration
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Table 1: BlueHeat/Net Sync Power Connections and Current Specifications
BlueHeat/Net
Description
Connector plug Connector
Voltage
Current
type
Polarity
4 Port DB25
Centre Positive*
5VDC
875mA
Synchronous /
Asynchronous
models (Rev A)
Left Positive*
5-28VDC
5-28VDC
@5V=2500mA
@28V=450mA
4 Port DB25
Centre Positive*
@5V=2500mA
@28V=450mA
Synchronous /
Asynchronous
models (Rev B)
Left Positive*
5-28VDC
@5V=2500mA
@28V=450mA
*Note: The power input is protected by a series diode to prevent damage in the case of a reverse polarity
connection.
Table 2: Connector Properties
Type
Details
Part Number
Typical Wire
Gauge
Standard DC Barrel
2.1mmID / 5.5mmOD
Digi-Key: CP3-1000-ND, or
equivalent
18-24 AWG
Stranded
Locking Screw Terminal,
3.3mm pitch
Phoenix PN: 1847055, or
equivalent
16-28 AWG
Stranded
MC Series
Screw Terminal,
3.5mm pitch
MC Series
Phoenix PN: 1840366, or
equivalent
16-28 AWG
Stranded
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Activating the Special Operations Mode and Default Settings
Blue Heat/Net Sync includes a push button on the rear of the unit beside the DC power
connector. This push button can be used to perform special operations such as resetting the unit
to its default settings or forcing port scanning in situations where the SCM is not accessible.
Using the Reset Button to Activate the Special Operations Mode
To activate the Special Operations Mode, hold the reset button while the unit is powering up.
Hold the button until all the port LEDs blink rapidly and then release the reset button. The port
LEDs will continue to flash rapidly after the reset button is released to indicate the Special
Operations Mode is active.
Selecting a Special Operation
Once the Special Operations Mode has been activated, four operation options are available:
1. Abandon the Special Operations Mode
To abandon the Special Operations Mode without selecting a special operation, press
and hold the reset button for at least four seconds. While the button is pressed, the
rapid flashing of the port LEDs will stop. After four seconds, the rapid flashing will
resume and the reset button can be released. After the release of the reset button, the
port LEDs will turn off, indicating that the Special Operations Mode has terminated.
2. Cancel a Special Operation
If you need to cancel a special operation after it has been selected, repeatedly press the
reset button until all the port LEDs begin to flash rapidly. Then abandon the Special
Operations Mode by pressing the reset button for four seconds, as explained above.
3. Select a Special Operation
Operations are selected by repeated short presses of the reset button. Each time the
reset button is pressed it is counted and represented on the port LEDs as a binary
operation which you want to perform. If you miss the selection that you want, keep
pressing the button. The count starts over again once it reaches 7 (1111 binary).
4. Activate a Special Operation
To activate a selection, press and hold the reset button for at least four seconds. During
this time the rapid flashing of the port LEDs will stop. Once the rapid flashing resumes
you can release the reset button. The port LEDs will turn off indicating that the Special
Operations Mode has been activated.
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Table 3: Available Special Operations
Special Operation
Number of presses (and binary
representation)
Usage
Force port scanning to
first two ports
(Scanning runs until
current scanning delay
setting times out. Default
is 30 seconds).
ONE press
This forces the first two ports to RS-232
mode, causing the SCM to scan these ports
and thereby allowing access to the SCM (see
note below).
Force port scanning to all TWO presses
ports.
This forces all ports to RS-232 mode,
therefore all ports are scanned for SCM use.
The Blue Heat/Net Sync will behave in the
same manner as an RS-232 only model (see
note below).
(Scanning runs until the
SCM is entered or until
the unit is powered
down. There is no time
out).
Restore factory default
settings
SEVEN presses
This restores the factory default settings for
ALL configuration parameters.
NOTE: Why would I need to force port scanning?
Some line interface settings are inappropriate for SCM use.
During boot up, the SCM scans only those ports set for RS-232
mode. If all of the ports are configured for another mode, (1/2
Duplex or Multi-drop) SCM port scanning is bypassed, and the
SCM application cannot be accessed. Use of either of the “Force
scanning to occur so the SCM application can be accessed.
Power On Diagnostics:
LED Error Codes
If an error is detected during the bootup process, an error condition and code are displayed on
the LEDs on the face of the Blue Heat/Net Sync.
The error condition is signaled by a rapidly flashing CPU LED (about 10 to 20 per
second).
•
•
The error code is displayed on Port LEDs 1 to 4 as a binary number.
Figure 11: LED Error Code Example
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In the above example, a rapidly flashing CPU LED during the boot up process signifies the Blue
Heat/Net Sync has experienced an error. Port LEDs 1 through 4 signify which error has
occurred. In this case, LED 2 and 3 are on, so the error code is 6. The chart below defines the
error details for each error code.
Table 4: LED Error Codes for Blue Heat/Net Sync
Error Code and Event
Details
Suggested Corrective
Action
The regions of flash memory which hold This may occur in when
1. Loader code in flash is erased.
the loader code are both erased. (There
are two redundant loaders in flash that
can be run).
there are ESD
disturbances or in
electrically noisy
environments. If this error
persists it may be a
hardware issue.
The regions of flash memory which hold See corrective action for
2. Loader code in flash has a bad CRC.
the loader code both have CRC errors.
(There are two redundant loaders in flash
that can be run).
error code 1.
The loader code is copied to RAM
before execution. This error is shown if
the RAM copy has a CRC error.
See corrective action for
error code 1.
3. RAM copy of loader code has a bad
CRC.
The CDS is copied from flash to RAM
See corrective action for
4. Configuration Data Space (CDS) areas
have corrupted data (CRC failure).
during the beginning of the loader code. error code 1.
If a CRC error is detected in the RAM
copy, this error is shown.
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This will occur when any of the enabled Check network
5. Cannot obtain an operating system
image (uClinux) to run.
boot sources (flash or BOOTP/TFTP or
TFTP) fail to obtain a valid compressed
operating system image to run.
connections, server
computer or your unit's
settings.
This error occurs if TFTP
booting is enabled and the
Blue Heat/Net Sync
cannot download the file
from the server.
persists.
This error occurs if the operating system
returns back to the loader.
See corrective action for
error code 1.
6. Unexpected return from the uClinux
operating system.
Certain CDS items are updated during
the bootup. If a failure occurs during the
re-programming of the flash, this error
will occur.
See corrective action for
error code 1.
7. CDS re-programming failure.
This error is usually caused by a Flash
memory failure.
Contact
8. Boot count could not be incremented
in flash memory
This message usually indicates a UART
component failure.
Contact
9. No ports found
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uClinux checks the CDS version number If you have updated the
15. Mismatched CDS version number
against its expected CDS version
number. If they are different, uClinux
does not continue its operation.
uClinux code via SCM
and have not updated the
loader/SCM code, this
error appears on reboot.
Update companion loader
code and reboot.
SCM Cabling requirements
SCM: Serial Configuration Manager
The Serial Configuration Manager is used to configure the Blue Heat/Net Sync via a serial port
and is discussed in greater detail later in this document. To access the Serial Configuration
Manager you will need to connect an RS-232 (V.28) serial cable from your standard computer
serial port to any RS-232 (V.28) port on the Blue Heat/Net Sync. The cabling required to
connect to the Blue Heat/Net Sync is as follows:
DB-25 M
DB-9 F
Connects to Blue Heat/Net Sync
Connects to PC
TX 2
RX 3
1- DCD
2- RX
RTS 4
CTS 5
DSR 6
SR 7
DCD 8
DTR 20
RI 22
3- TX
4- DTR
5- GND
6- DSR
7- RTS
8- CTS
9- RI
Figure 12: Blue Heat/Net Sync Serial Cable Connection Diagram
The key signal connections are RX, TX and GND. The other signals may not be required in your
application. If you are assembling your own SCM cable, we recommend that all of the above
connections be made.
Setting a Static or Dynamic IP Address
Prior to configuring the Blue Heat/Net Sync, you must set a static or dynamic IP address. The
default IP address of a new Blue Heat/Net Sync is 192.168.42.1. If there is a possibility that this
has been changed, you will need to find the current IP address setting before you begin.
The easiest way to get the IP address of your Blue Heat/Net Sync is as follows:
Follow the steps outlined in the section Installing the Blue Heat/Net Sync Configuration
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Set the IP Address Using the Web Configuration Manager
NOTE: If you use the Windows Configuration Manager
and use Auto Discover to locate your Blue Heat/Net
Sync on the network, you can right-click and launch the
Web Configuration Manager from there.
You only need to use the route add command if you
choose not to use the Configuration Manager found on
the CD that accompanied your Blue Heat/Net Sync unit.
From the command prompt of your computer, run: route add A.B.C.0 mask 255.255.255.0 <current
IP of your host machine> Be sure to replace the .D from the Blue Heat/Net Sync‟s IP with a 0
(zero). Open your browser and put the Blue Heat/Net Sync‟s IP in the address bar (i.e. A.B.C.D)
This will open the WCM. Log in (default login is wcm and the default password is password)
and assign the static IP or change the IP to 0.0.0.0 if you are using a DHCP assigned IP.
Set the IP Address Using the Serial Configuration Manager
Insert your CD into the computer and complete the following steps:
1. Once your CD has been inserted, the Driver/Software Installation menu should appear. If it
doesn‟t, double-click on ctisetup.htm.
2. Click View in the Blue Heat/Net Sync Software section and then Connect in the Serial
Configuration Manager section. This will launch HyperTerminal that comes with Windows XP.
3. Unplug the power to the Blue Heat/Net Sync and plug it back in. Light indicators 1 to 4 will
blink sequentially. This sequential flashing will last for 30 seconds. You must log in during
this window.
4. During this sequential flashing, type the word password into the HyperTerminal window. Be
careful you do not miss the window of opportunity to enter the password.
5. You now have access to the Serial Configuration Manager (SCM). An scm> prompt is ready
to accept commands. If you do not see this prompt, unplug the power and repeat the steps above.
If you wish to set a dynamic IP address enter the following:
net dhcp=yes
save
exit
If you wish to set a static IP address, enter the following, substituting xxx.xxx.xxx.xxx with the
static IP you wish to assign:
net mip=xxx.xxx.xxx.xxx
save
exit
Close the HyperTerminal. You may now disconnect the DB-25 cable from your PC and connect
it to any serial device
.
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Blue Heat/Net Sync Configuration
The Blue Heat/Net Sync comprises several software components, each of which manages
various functions of the Blue Heat/Net Sync. The following is a breakdown of these
components.
.
.
Operating System Software
o
o
o
Host Operating System Driver
Configuration Manager
Web browser (Host Operating System supplied)
Blue Heat/Net Sync Software (Firmware)
o
Embedded Operating System (uClinux)
.
.
Kernel
Drivers
Ethernet
Serial
Flash
.
.
.
.
Blue Heat/Net Sync Ethernet Protocol Converter application (Ctid)
Web server (Boa)
Web pages
Telnet services
o
o
o
o
PPP Client and PPP Server
Bootloader
Serial Configuration Manager (SCM) Application
Configuration Data Space (CDS)
The following section describes in brief what each main component controls.
Host Operating System Driver
The host operating system driver performs the translation from a standard serial COM port
interface to the Blue Heat/Net Sync protocol (which is then delivered to the LAN as described
above).
Configuration Manager
This software manages and configures the relationships between the Blue Heat/Net Sync serial
ports and the COM port assignments of the Host Operating System.
Web Browser
The host operating system supplies a Web Browser to support the Web Configuration Manager
(WCM) used to change the configuration settings of Blue Heat/Net Sync units.
Embedded Operating System
The embedded operating system is uClinux.
Bootloader
This code first starts up the embedded processor of the Blue Heat/Net Sync from a power-up or
software initiated reboot. It then obtains the embedded operating system image (file) from one of
several locations and runs the operating system.
Serial Configuration Manager (SCM) Application
This application is used to change the configuration settings of Blue Heat/Net Sync units by
connecting to a serial port on the Blue Heat/Net Sync from a terminal (or terminal emulation
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program on a PC).
Configuration Data Space (CDS)
This is the area, in non-volatile (flash) memory, which stores the configuration parameters.
CDS (Configuration Data Space)
Description
The Blue Heat/Net Sync has a number of configuration parameters which are stored in a non-
volatile (flash memory) area. (See appendix for list of parameters).
The CDS area is stored redundantly in the flash memory along with a CRC-style checksum to
ensure data integrity.
Access to CDS Parameters
The parameters stored in the CDS can be changed through the use of the following configuration
tools:
SCM Serial Configuration Manager
WCM Web Configuration Manager
These three methods allow the user to change configuration parameters by the method that is
most convenient. In some cases several methods will be employed during different stages of the
setup of the Blue Heat/Net Sync. For example:
The SCM may be employed in the beginning when the unit is not connected to a network and
various networking parameters need to be set up prior to connection to a network.
WCM may be employed after the unit is connected to a network, possibly to modify other
settings related to serial ports, bootup settings or others.
NOTE: When CDS parameters are changed via the
SCM or WCM some settings will not take effect until the
Blue Heat/Net Sync is rebooted.
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SCM (Serial Configuration Manager)
Description
The Serial Configuration Manager is one of the applications you can use to access the
Configuration Data Space (CDS) settings of the Blue Heat/Net Sync. Since the CDS stores the
default serial port settings, it is important that the line mode is configured prior to first use.
Accessing the ports will not be possible otherwise.
Getting Access to the SCM
To access the SCM, simply connect a serial port terminal device (or a PC running a terminal
emulator program) to any of the serial ports on the Blue Heat/Net Sync and enter a correct
Password. A command prompt is then sent to the terminal and CDS parameters can be changed
using a command line style of entry.
Blue Heat/Net Sync has configurable line interfaces. Certain settings can affect access to the
SCM. The ports are scanned as follows:
The default line mode setting of all ports is Undefined. Under these conditions, the first two ports
are set to RS-232 mode during port scanning. Access to the SCM is available through these ports
only (you should set all ports to a known state prior to use).
When a port is set to something other than Undefined, any port with a setting of RS-232 or RS-
485 Full Duplex will be scanned. Otherwise, scanning is not performed and access to SCM is
not available.
NOTE: To access the Blue Heat/Net Sync via the SCM
your serial line interface settings must be at the default
values of 9600 baud, 8 data bits, no parity and 1 stop bit
(9600, 8, n, 1). No flow control is recommended.
In a situation where port scanning is not performed, you can still access the SCM using the push
button reset on the back of the unit. Follow the instructions in the section Activating the Special
Operations Mode and Default Settings to access the SCM in this situation
See the section which describes how the Blue Heat/Net Sync boots for a complete description of
the Bootup process of the Blue Heat/Net Sync and how to access the SCM.
SCM Command Reference
SCM commands are entered as strings of ASCII characters with options separated by whitespace
characters. The entire command line is terminated by a CR character or CR/LF character pair.
Command lines can be entered manually (via a terminal or a PC with terminal emulator
program) or sent from an application program.
If an SCM command is entered with no options specified, the command shows the syntax of its
options and the current setting of those options.
Brief Command List
.
.
.
.
.
.
Bootup settings
SCM operational settings
Exits the SCM application (and optionally reboots the Blue Heat/Net Sync)
Brief list of available commands and their syntax
Blue Heat/Net Sync general information and flash verification
Network settings
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.
.
Save setting changes to non-volatile flash storage
Download a new operating system via TFTP and flash,
(uClinux) and loader/SCM image.
Command Details
boot
Syntax:
boot [mode=] [file=] [delay=]
Description:
This command establishes the Blue Heat/Net Sync boot-up mode. For a detailed
description of the boot-up process of the Blue Heat/Net Sync, see How the Blue
Heat/Net Sync Boots Up in the Appendix.
Options:
mode=
A comma-separated list of the following sub-options. Each sub-option is
preceded by either a + or a – to indicate if the sub-option is enabled or disabled.
±flash Enables or disables the ability to boot from the flash memory.
±bootp Enables or disables the ability to obtain the boot-up information from a
Server.
±tftp Enables or disables the ability to download and boot from a file located on
a Server.
file=
This option specifies the default file name used for the boot-up (if TFTP boot is
enabled) and also the default file name when using the flos command.
This can be any sequence of characters up to 128 characters in length. (The
default is BHNuClinux_vvv.gz, where vvv is the current version number of the
“Operating System image”).
delay=
This sets the time duration for accessing the SCM application. It can be set from
Boots Up for more information).
cfg
Syntax:
cfg [port=] [timeout=] [password=] [prompt=] [file=]
Description:
Establishes the settings used by the SCM application to
modify its behavior.
Options:
port=
Specifies the port number to scan for a password to gain entry in the SCM.
N = Scan just port N (N=1 to the number of ports on the unit).
255 = Scan all ports on the unit (default unless unit has programmable line
interfaces).
timeout=
Specifies the time duration allowed for a TCM (via telnet) session to be idle (no
activity) before the session is terminated.
0 to 1092 minutes
(default = 5)
Note: A setting of zero allows infinite timeout.
NOTE: The TCM function is currently not available with this
product.
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password=
This sets the password phrase, which is used to gain access to the SCM and
WCM modes of configuring the Blue Heat/Net. The default is “password”.
prompt=
This setting controls whether a password prompt (and other password entry
status information) is presented to the terminal. This prompting is helpful for
new users of the product but may present a problem when other devices are
connected to the serial port.
yes
no
enables the password prompting (default)
disables the password prompting
file=
This sets the file name used as a default when using the flldr command.
It can be any sequence of characters up to 128 characters in length. (The default
is “BHNloader_vvv.gz”, where vvv is the current version number of the
“Loader”).
exit
Syntax:
exit [-nosave] [-no_reset][-login]
Description: This command is to exit the SCM and reboot the Blue Heat/Net Sync. If CDS
changes have been made a warning message is issued and the SCM will not exit.
Options:
-nosave
Exit without saving changes (abandon changes).
-no_reset
Exit SCM without rebooting, maintaining the changes to settings for this session
only. (Booting is continued after the SCM is exited.)
-login
Exit without saving changes, and restart the SCM login process.
help
Syntax:
help
Description:
Options:
Displays a brief list of all the commands.
There are no options for the help command. Please note that specific help for the
options of each command can be obtained by entering any command with a
single “?” argument. An example would be net ?
info
Syntax:
info [-v]
Description:
This command is used to show basic information about the Blue Heat/Net Sync
unit, like Serial Number and Version Numbers, and performs a confidence
(CRC and Decompression verification) test of the contents of the flash memory.
Options:
Syntax:
-v
This option disables the confidence tests.
net
net
[network= | net=]
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[my_ip= | mip=]
[server_ip= | sip=]
[gateway_ip= | gip=]
[subnetmask= | snm=]
[broadcast_ip= | bcip=]
[dns_ip=]
[domain=]
[host name=1 host=]
[tcp=]
[mac=]
[dhcp=]
Description: Establishes the network settings.
Options:
network= | net=
Sets the “network” portion of the IP address into my_ip, server_ip and
gateway_ip. The address entered is masked by the subnet mask setting before
being applied. This command is a shortcut for quickly setting all the IP
addresses of the unit. See note below.
my_ip= | mip=
This sets the IP address of the Blue Heat/Net Sync unit (default is 192.168.42.1).
See note below.
server_ip= | sip=
This sets the Server IP address. This address determines the address of the
Server to use when the Bootp and tftp mode is enabled (see boot command), and
also as the default Server address to use for the update commands (default is
0.0.0.0). See note below.
gateway_ip= | gip=
This sets the Gateway IP address. This address is used when the Bootp mode is
enabled, default is 0.0.0.0. See note below.
subnetmask= | snm=
This sets the Subnet mask IP address. (The default is 255.255.255.0) See note 1.
broadcast_ip= | bcip=
This sets the Broadcast IP address. This is used when the Bootp mode is
enabled. (The default 255.255.255.255). See note below.
dns_ip=
This sets the IP of Domain Name Server. (The default is 0.0.0.0). This must be
set to update the Blue Heat/Net Sync firmware automatically from Connect
Tech‟s anonymous ftp server.
domain=
This sets the Domain name of the unit. (The default is blueheat.net)
Host name=1 host =
This sets the Host name of the Blue Heat/Net Sync unit. (The default is
BHNssssssss, where “ssssssss” is the serial number of the unit).
tcp=
This sets the base TCP port number used for Host TCP/IP and UDP/IP
communications. The default is 49152 (0xC000)
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mac=
This displays the MAC address of the unit. (The default is 00:0C:8B:SS:SS:SS,
where SS:SS:SS is the hex value of the serial number of the unit). Note: The
MAC address cannot be changed, it can only be displayed.
dhcp=
This enables or disables DHCP support.
yes
no
enables
disables (default)
NOTES:
All IP addresses are entered in common IP address
notation: ddd.ddd.ddd.ddd where ddd is a decimal number
from 0 to 255.
IP address “my_ip, server_ip, gateway_ip and dns_ip” can
be entered right justified, meaning that the address
entered will be applied to the specified address starting
from the least significant digit, masked by the subnet
mask. For example:
If the subnet mask is set to 255.255.255.0, and the
following command is entered:
net net=12.23.34.00 mip=45 sip=56 gip=67 dns_ip=89
The following IP addresses result:
the Blue Heat/Net Sync unit will be
12.23.34.45
the Server will be
the Gateway will be
and the DNS IP will be
12.23.34.56
12.23.34.67
12.23.34.89
save
Syntax:
save
Description: This command saves the setting changes into the CDS in the non-volatile (flash)
memory.
Options:
(none)
update
Syntax:
update <-os | -loader | -jffs> [server_ip= | sip=] [file=]
Description: Download and store (in flash memory) a new uClinux Operating System image
or a new Loader/SCM image. The download is conducted by a TFTP download
from a Server. After download the image file is checked as being a valid gzip
file (file is decompressed to validate its contents), and then the file is stored in
flash memory. The OS file is stored in flash in its compressed form, but the
Loader is stored uncompressed.
Options:
-os | -loader | -jffs
Use -os to update the uClinux OS.
Use –loader to update the loader/SCM.
Use –jffs to update the JFFS system (Journaling Flash File System).
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server_ip= | sip=
Specify the Server IP address from which the file is to be downloaded.
file=
Specify the file name to download. If the –jffs option is chosen, then the file=
option is mandatory.
NOTE: After downloading, the image is checked to
ensure the file is correctly formatted. If the file is bad the
command exits. The version is checked against your
current version. If they match, you will be prompted to
choose if you wish to program the flash. Enter “y” to
continue. If the version is different, the new version
needs to be saved with the save command when the
update is finished.
When the JFFS is updated, all previous contents are
destroyed. Only use this option when updating to a Blue
Heat/Net Sync that supports Personality settings.
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WCM (Web Configuration Manager)
Signing In to the Web Configuration Manager
You will need to know the IP address of your Blue Heat/Net Sync unit before you use the Web
Configuration Manager. Use the Serial Configuration Manager to assign the Blue Heat/Net Sync
a valid IP address, or tell the Blue Heat/Net Sync to use DHCP to automatically obtain an IP
do this.
You will arrive at the Blue Heat/Net Sync Web Configuration Manager Sign In page. The
default username is wcm. Leave this name as is. The default password is password. Use this
username/password combination and click the Sign In button to log on to the Web Configuration
Manager.
Figure 13: Web Configuration Manager Sign In
Once you have signed in, you should immediately
change the default password.
At this point you should be directed to the Web Configuration Manager homepage.
To sign out of the Web Configuration Manager, just click on the Sign Out link on the upper
right hand side of the Web Configuration Manager.
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Configure Advanced Serial Settings
The Web Configuration Manager also allows you to configure more advanced serial port
properties. These advanced properties will allow you to configure the XOn Character, XOff
Character, Break Character, Escape Character, Error Character and Event Character, and
Transmit Load Setting for each serial port.
Further, you will be able to specify whether you want to enable Null Stripping or RTS Toggle
for a particular port as well as the option to enable or disable the Break, Event and Error
characters.
By default, all advanced serial properties are disabled. You should only use these advanced
properties if you require them.
You are required to use the ASCII representation of characters using the respective hexidecimal
values. For example, if you wanted your XOn character to be capital 'A', you would specify a
hex value of 41.
We have provided you with an ASCII table on the Advanced Serial Port Properties page for your
convenience. Click on the ASCII Table link, and an ASCII table will open in a new window.
Each serial port parameter has been abbreviated due to space constraints. We have provided
another link which describes the abbreviated parameter descriptions. Click on the Parameter
Descriptions link, and a new window will open which contains a description of each parameter.
Configure Blue Heat/Net Sync Settings
This section provides various Blue Heat/Net Sync Configuration options, and shows you the
saved versus current settings. The details for each configuration option are provided below:
Flash Enabled: This option enables or disables the ability of the Blue Heat/Net Sync to
boot-up from flash memory.
•
•
•
•
Bootp Enabled: This option enables or disables the Blue Heat/Net‟s ability to obtain
boot-up information from the server (see "Server IP Address" below).
TFTP Enabled: This option enables or disables the ability to download and boot from a
file located on a server (see "Server IP Address" below).
DHCP Enabled: This option enables or disables the use of DHCP. If DHCP is enabled,
the Blue Heat/Net Sync will attempt to automatically obtain an IP address. If DHCP is
disabled, you must manually specify an IP address for the Blue Heat/Net.
Configuration Port: This option sets the port to scan for the password to gain entry into
the Serial Configuration Manager. You can specify a particular port, or specify the Scan
All Ports option. In this case the Blue Heat/Net Sync will scan all ports for the password
when the Blue Heat/Net Sync is booting. The default setting is Scan All Ports.
•
•
Session Timeout: This option specifies the time allowed between web page navigation.
The default session timeout is 5 minutes. This means if the Web Configuration Manager
has not received any requests for more than 5 minutes, you will be automatically logged
out. You can set the timeout from 1 minute to 2 hours, or disable the session timeout all
together by selecting the Disable Timeout option.
Boot Delay: This option specifies time allowed for gaining access to the Serial
Configuration Manager while the Blue Heat/Net Sync is booting. The time ranges from
2 seconds to 30 seconds. The default setting is 30 seconds.
•
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Server IP Address: This option sets the server IP address. This is used as the Server
address to use when bootp mode or TFTP mode is enabled. The default Server IP
•
address is 0.0.0.0
Blue Heat/Net Sync IP Address: This option sets the IP address of your Blue Heat/Net.
The default IP address for your Blue Heat/Net Sync is 192.168.42.1
•
•
•
•
•
•
•
Domain Name: This option sets the domain name of your Blue Heat/Net. The default
domain name is blueheat.net.
Host Name: This option sets the hostname of your Blue Heat/Net. The default hostname
is BHNssssss, where ssssss is your Blue Heat/Net Sync serial number.
Gateway IP Address: This option sets the Gateway IP address for your Blue Heat/Net.
The default Gateway IP address is 0.0.0.0
Broadcast IP Address: This option sets the Broadcast IP address. The default Broadcast
IP address is 255.255.255.255.
Subnet Mask: This option sets the Subnet mask IP address. The default Subnet mask IP
address is 255.255.255.0.
Bootfile Name: This option specifies the default file name which will be used for Blue
Heat/Net Sync boot-up, if TFTP is enabled. If TFTP is enabled, the Blue Heat/Net Sync
will attempt to download the bootfile you specify from a Server IP address you specify
(see "Server IP Address" above). The bootfile name should reference a valid uClinux
kernel image. If TFTP is enabled, the Blue Heat/Net Sync unit will attempt to download
this image, and will also attempt to decompress the image and run it.
TCP Port: This option allows you to change the starting local TCP port that is used to
service clients connecting to the Blue Heat/Net Sync unit. The default TCP port is
49152. When altering the TCP port on the Blue Heat/Net Sync unit, you must also alter
it on the user‟s side.
•
•
Domain Server IP Address: This option sets the Domain Name Server IP address. The
default DNS IP address is 0.0.0.0.
After you've made any necessary configuration changes, click the Submit button at the bottom of
the page. A confirmation page will show up confirming the Blue Heat/Net Sync changes.
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Figure 15: Configuring Blue Heat/Net Sync Settings
Configure Firmware
This section enables you to download new firmware to the Blue Heat/Net Sync unit. Select a
download source and a specific firmware file path, if applicable, and then submit the download
request. This section also provides a link to reboot your Blue Heat/Net. This is standard
procedure after installing new firmware.
Figure 16: Firmware Upgrades/Downloads
Restore Defaults
The Restore Defaults page enables you to quickly reset all or some of the default basic,
advanced, security, Blue Heat/Net Sync or system settings of your Blue Heat/Net Sync.
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NOTE: This function is not currently operational.
Figure 17: Restore Default Settings
Saving To Flash
When you make configuration changes, the changes are stored temporarily in memory. If you
reboot your Blue Heat/Net Sync at this point, any configuration changes you made will be lost.
To permanently save your changes, you need to save them to flash. In order to do this, click the
Save to Flash button on the upper right-hand side of the Web Configuration Manager page.
If there are changes that need to be saved, the Save To Flash button will be yellow. Click the
Submit button to permanently save any configuration changes to the flash memory so they will
be present when you reboot your Blue Heat/Net.
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Figure 18: Saving To Flash
If you haven't made any configuration changes, the Save To Flash button will remain grey.
Monitoring Your Blue Heat/Net
The Blue Heat/Net Sync WCM lets you monitor serial port activity, network traffic and TCP/IP
statistics as well as providing hardware and software details for your Blue Heat/Net Sync unit.
Monitor Serial Port Traffic
This page allows you to monitor your serial port traffic. For each Blue Heat/Net Sync port, you
can view the number of bytes transmitted, received, whether the port is using flow control, if
there are any Parity/Framing/Overrun errors, and which remote IP address is connected to your
serial port.
If ports are active (open) they are shown in green, while inactive (closed) ports are shown in
grey.
NOTE: This function is not currently operational.
Figure 19: Monitoring Serial Port Activity
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Monitor Network Traffic
This page allows you to view all network activity on your Blue Heat/Net. For each active
network connection, you can view the local IP address and port, the remote IP address and port,
the status of the connection, the protocol being used, as well as the number of queued transmit
and receive bytes.
Figure 20: Monitoring Network Traffic
Monitor TCP/IP Statistics
This page allows you to view TCP, IP, UDP and ICMP statistics for your Blue Heat/Net Sync.
This page also has a link which describes each of the network statistic parameters. Simply click
on the Parameter Descriptions link, and a new window will open up which contains a description
of each parameter.
Figure 21: Monitoring TCP/IP Statistics
My Blue Heat/Net Sync
This page provides you with three display options: Hardware, Software and Performance.
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Use this link to find information such as device serial number, runtime software versions and
firmware versions.
Figure 22: My Blue Heat/Net Sync Hardware Details
Figure 23: My Blue Heat/Net Sync Software Details
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Software Installation for Windows
The Blue Heat/Net Sync is designed for easy installation and set up.
This section deals with installing and using the Blue Heat/Net Sync software to communicate
with your Blue Heat/Net Sync.
To do so, you will use the CD included with the Blue Heat/Net Sync to install the Configuration
Manager on your computer. The Blue Heat/Net Sync Configuration Manager will allow you
install the Blue Heat/Net Sync on your local system, and map and configure the Blue Heat/Net
Sync‟s communication ports.
NOTE: Software support for Windows is still in development
Installing the Blue Heat/Net Sync Configuration Manager
The Blue Heat/Net Sync Configuration Manager is a tool to control your Blue Heat/Net Sync
from your local Windows operating system. To install the Blue Heat/Net Sync Configuration
Manager on your computer, insert the CD provided with your Blue Heat/Net Sync into the disk
drive.
You should see this window in your browser:
Figure 24: Blue Heat/Net Sync Driver/Software Installation CD
NOTE: Windows XP SP2 users should read the SP2 info
prior to installing the Configuration Manager
Select View from the Blue Heat/Net Sync software. It will bring you to the following screen.
Click Install to begin the Configuration Manager installation. Ensure you choose Open or Run
when the File Download window appears and asks if you‟d like to open the file or save it to
your computer.
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The Blue Heat/Net Configuration Manager Setup Wizard will begin. Click Next to start.
Next you will have the option to launch the configuration manager after installation.
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The installer will install the Configuration Manager into C:\Program Files\CTI\Blue Heat Net. If
you‟d prefer an alternate location, specify in the space provided, or click Browse to locate the
new folder. Click Next.
You will then be prompted to confirm you wish to install the Configuration Manager. Select
Next to begin.
When the Installation Complete window appears, the Configuration Manager has been
successfully installed. Click Close to exit the installation wizard.
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Running the Configuration Manager
If you chose the option to launch the Blue Heat/Net Sync Configuration Manager after
installation, the main Configuration Manager window should now be open on your screen. If
you did not, you can launch it from the CTI default folder or whichever folder you chose during
the installation.
Figure 26: My Blue Heat/Net Sync Places Screen
Device Installation
Select My Blue Heat/Net Sync Places from the main Configuration window. (NOTE: If there is no
Blue Heat/Net Sync installed, you will be prompted to auto discover a Blue Heat/Net Sync on
Heat/Net Sync section)
Right-click on My Blue Heat/Net Sync Places or click on the Action menu to pull up the sub menu
options.
There are three ways to install a Blue Heat/Net Sync device: Configure Default Blue Heat/Net
Sync, Add New Blue Heat/Net Sync or Auto Discover Blue Heat/Net Sync.
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Configure Default Blue Heat/Net Sync
You can choose this option when your Blue Heat/Net Sync still has a factory default IP address
of 192.168.42.1. It will launch the Web Configuration Manager for this IP address, enabling
Figure 27: Add or Auto Discover Blue Heat/Net Sync Menu Screen
Add New Blue Heat/Net Sync
You can add a Blue Heat/Net Sync by specifying its IP address or MAC address.
If you specify an IP address, the Configuration Manager will connect to that specific Blue
Heat/Net Sync and the configuration information for installation. If it cannot connect, it will not
install the unit. The Blue Heat/Net Sync may get the IP address from DHCP server or it can be
manually fixed. The Configuration Manager will use 49152 as the default TCP port. This value
is configurable.
If you specify a MAC address (located on the underside of the device), the Configuration
Manager will use the auto-discover mechanism to retrieve the information for installation. The
auto-discover mechanism uses UDP broadcast, so the unit must be located on the local network
to install via MAC address. The Configuration Manager will use 49152 as the default UDP port.
This value is configurable.
Figure 28: Add Blue Heat/Net Sync Screen
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Auto Discover Blue Heat/Net Sync
The auto discover will broadcast a message to all the Blue Heat/Net Sync devices on your
network. Upon receiving the broadcast packet, the Blue Heat/Net Sync device will respond.
Click the Auto Discover button to search for Blue Heat/Net. The searching domain can be
changed by checking Use Specific Broadcast IP and entering an IP address domain in the IP
address box. The broadcast packet will use the default UDP port 49152, but it can be changed in
the Blue Heat/Net Sync configuration. The Stop button will end the search.
Figure 29: Auto Discover Blue Heat/Net Sync Screen
Auto Discover will list any Blue Heat/Net Sync on your network, along with Blue Heat/Net
Sync's serial number, IP address, host name, number of available ports and the MAC address.
To install a Blue Heat/Net Sync check the appropriate box under Serial # column and then click
OK. Right click for more options, including the option to launch the Web Configuration
Manager.
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Firmware Upgrades
If you need to re-install your current firmware, it is located in the firmware directory of the CD
you received with your Blue Heat/Net Sync.
Newer firmware versions are available from Connect Tech‟s website,
product. Ensure the following parameters are set: mip, sip, gip and dns_ip using the SCM. To
upgrade your Blue Heat/Net Sync firmware, you can use any of the following three methods,
depending on your preference.
Upgrade using WCM (Web Configuration Manager)
The Web Configuration Manager is the easiest way to upgrade your firmware. Simply log onto
Firmware link on the left menu. This will bring you to the Firmware page. You will have the
option to upgrade from the remote CTI website, or to download the upgrade from a local FTP
server.
If you choose to upgrade via a local FTP server, copy the firmware (*.tar) file to the anonymous
directory of a local FTP server. If you do not have a local FTP server, contact your system
administrator to set one up.
Upgrade using SCM (Serial Configuration Manager)
The SCM method of upgrading is used when the Blue Heat/Net Sync does not boot properly.
You can reinstall your original firmware from the supplied CD, or you can download any newer
versions that exist from the CTI website in the
http://www.connecttech.com/asp/Support/DownloadZone.asp or go directly to the FTP site as
indicated below.
You will need the use of a TFTP server. (Contact your system administrator to obtain access to
a TFTP server). Download the most recent firmware components from the FTP site
BHNloader_VXXX.gz and BHNjffs2_X.XX.gz.
These files contain all of the Blue Heat/Net Sync firmware. Follow the update command
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Software Development
Hardware Information
The information provided in this section will offer data pertaining to the hardware components present
within the Blue Heat/Net Sync unit. Hardware information documentation will encompass hardware
resources, base address map, memory map and table, as well as, PLD registers.
Hardware Resources
The hardware resources available for use in software development for the Blue Heat/Net Sync, include;
chip selects, interrupts, ColdFire MCF5272 GPIO.
Chip Selects
Chip
Select *
Usage
Data Bus
Width
Address Range
Cycle Termination
/CS0
This chip select is used
to boot the CPU from
the Flash. The Flash is
8M Byte in size.
16 bits
0xFE00 0000 –
0xFE80 0000
- Internal WS logic.
- 5 wait states.
8 Mbytes
/CS1
/CS2
/CS2
Used to select the
IUSCs and the internal
PLD registers.
16 bits
16 bits
0x4000 0000 –
0x4000 2000
External /TA signal
External /TA signal
Undefined.
8 kbytes
0x8000 0000 –
0x8000 8000
Dual Ported RAM. 32k
Bytes total size
32 kbytes
Undefined. For future
Undefined, but Undefined.
expansion or debugging could be 8 or
purposes. Available on
debug header P11 on
page 8 of Schematic
16 bits
/CS7
Used for SDRAM. The 32 bits
SDRAM is 16M Bytes
in size.
0x0000 0000-
0x0100 0000
Internal WS logic and
SDRAM controller.
16 Mbytes
Table 5: Chip Selects
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Interrupts
INT *
Usage
/INT1, /INT2
IUSC logically or-ed interrupts. IUSC Interrupts can be muxed to any of the two INTs.
One use is to mux all ports configured for Async mode to one IRQ and all ports
configured for Sync mode to another interrupt. This should facilitate better software
architecture and operation.
/INT3
/INT6
PLD Interrupt. To support miscellaneous PLD section functions.
Ethernet PHY Interrupt. Same PHY as other MCF5272 based Blue Heat/Net models.
* INTs are active low. Unused interrupts are pulled up to V+.
Table 6: Interrupts
ColdFire MCF5272 GPIO
GPIO Bit(s) *
Direction
Usage
PA0 – PA4,
PA6
PA5
Undefined
Undefined. For future expansion or debugging purposes. Available on
debug header P11 on page 8 of Schematic
CPU Status LED.
Output
1 = LED Off
0 = LED On.
PA8 – PA11
PA13
Input
Input
PCB ID. Should be 0x4, for BHN Sync 4 Port.
Pushbutton input.
1 = not pushed
0 = pushed
PA14
Output
Software forced hardware reset.
1 = Not reset. When setting up this GPIO, be sure to set port to a „1‟
before changing direction to output.
0 = forces a hardware reset
Table 7: ColdFire MCF5272 GPIO
* All unused GPIO is pulled up with a pullup resistor.
Base Address Map
Item
Address Range (hex)
1000 0000
ColdFire MBAR
Internal SRAM (4k Byte)
IUSC 0
IUSC 1
IUSC 2
2000 0000
4000 0000
4000 0400
4000 0800
4000 0C00
4000 1000
8000 0000
FE00 0000
IUSC 3
PLD registers
DPR (32k Byte SRAM)
Flash (8 M Byte )
Table 8: Base Address Map
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Memory Map of IUSC and PLD Functions
ColdFire (5272) Bus:
A ColdFire CS# signal is used to select the entire region, setup with the following attributes…
8K (8192) byte region
16 Bit bus
Use TA# signal to terminate the bus cycle (this places wait state generation in the hands of
the PLD logic).
o
o
o
o
o
o
CSBR.EBI = 00b
CSBR.BW = 10b
CSOR.WS = 0x1F
CSOR.BAM = as required
CSOR.BA = as required
selects 16/32 SRAM/ROM mode
selects 16 bit bus
selects the use of the TA# signal
selects size of region
sets 32 bit Base address of the region
ColdFire Bus Addresses A0 through A12 are used to “address” all items
A[12]
divides the region into 2 (4096 byte) areas
IUSC Access:
A[12] Must be zero (0).
A[11..9]
Are decoded into 8 functions which access the 4 IUSC devices
A11
A10
A9
IUSC
Function
Notes
selected
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
0
0
1
1
2
2
3
3
Register Read/Write
Interrupt Acknowledge
Register Read/Write
Interrupt Acknowledge
Register Read/Write
Interrupt Acknowledge
Register Read/Write
Interrupt Acknowledge
Write not allowed [1]
Write not allowed [1]
Write not allowed [1]
Write not allowed [1]
[1] A write to these addresses are ignored, but the ColdFire bus cycle is properly terminated.
A[8] Is “connected” (inverted) to the IUSC S//D pin
0 = Selects “Serial Controller” registers in the IUSC device.
1 = Selects “DMA” registers in the IUSC device.
A[7] Is “connected” to the IUSC D//C pin
0 = Selects Serial “Control” registers
1 = Selects Serial “Data” registers
A write places data into the Transmitter FIFO
A read removes data from the Receiver FIFO
The word “connected” above, is used loosely to mean… The address bit is routed from the
ColdFire bus to the indicated IUSC pin via the logic in the PLD.
A[6] Is not used (set to zero for all operations).
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A[5..1]
Addresses IUSC registers (see Memory Map Table below).
A[0] Not used explicitly, A0 (along with BS0# and BS1#) select byte size portions of IUSC
registers.
PLD Resource Access:
A[12] Must be one (1).
A[11..5]
A[4..2]
Are not used.
Are decoded into selections of internal PLD “registers”.
A4
A3
A2
Function
Notes
0
0
0
Real Time Clock
32 bit read/write (16 bit portions
also accessible)
0
0
0
1
1
1
1
0
1
1
0
0
1
1
1
0
1
0
1
0
1
LED Control
16 bit read/write only
16 bit read/write only
16 bit read/write only
16 bit read/write only
16 bit read/write only
16 bit read/write only
16 bit read only
Port-1 Line I/F control
Port-2 Line I/F control
Port-3 Line I/F control
Port-4 Line I/F control
Control
Status
A[1] Is used to select the 16 bit portions of the Real Time Clock register.
A[0] Is not used.
PLD Memory Map Table
Address
Offset
Area (item)
Accessed
Register
Accessed
Notes
(in hex)
IUSC Area
IUSC-0
000
002
004
006
008
00A
00C
00E
010
012
014
016
018
01A
01C
01E
020
IUSC-0 Sreg [1]
IUSC-0 Sreg
IUSC-0 Sreg
IUSC-0 Sreg
IUSC-0 Sreg
IUSC-0 Sreg
IUSC-0 Sreg
IUSC-0 Sreg
IUSC-0 Sreg
IUSC-0 Sreg
IUSC-0 Sreg
IUSC-0 Sreg
IUSC-0 Sreg
IUSC-0 Sreg
IUSC-0 Sreg
IUSC-0 Sreg
IUSC-0 Sreg
CCAR
CMR
CCSR
CCR
PSR
PCR
TMDR
TMCR
CMCR
HCR
IVR
IOCR
ICR
DCCR
MISR
SICR
RDR(TDR)
8/16 bit Serial Data (byte/word)
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Address
Offset
Area (item)
Accessed
Register
Accessed
Notes
(in hex)
Writes go to the Transmitter FIFO
Reads come from the Receiver FIFO
022
024
026
028
02A
02C
02E
030
IUSC-0 Sreg
IUSC-0 Sreg
IUSC-0 Sreg
IUSC-0 Sreg
IUSC-0 Sreg
IUSC-0 Sreg
IUSC-0 Sreg
IUSC-0 Sreg
RMR
RCSR
RICR
RSR
RCLR
RCCR
TCOR
TDR(RDR)
8/16 bit Serial Data (byte/word)
Writes go to the Transmitter FIFO
Reads come from the Receiver FIFO
032
034
036
038
03A
IUSC-0 Sreg
IUSC-0 Sreg
IUSC-0 Sreg
IUSC-0 Sreg
IUSC-0 Sreg
IUSC-0 Sreg
IUSC-0 Sreg
---
TMR
TCSR
TICR
TSR
TCLR
TCCR
TC1R
---
03C
03E
040 07F
080->09F
Aliases of addresses 00 3F
IUSC
RDR/TDR
16 bit Serial Data transfers ONLY!!
Writes go to the Transmitter FIFO
Reads come from the Receiver FIFO
(useful for block data movements)
Aliases of 080->9F
Data FIFO‟s
(32 bytes)
0A0 0FE
100
IUSC-0 Dreg [2]
IUSC-0 Dreg
---
IUSC-0 Dreg
IUSC-0 Dreg
---
IUSC-0 Dreg
IUSC-0 Dreg
---
DCAR
TDMR
---
DCR
DACR
---
BDCR
DIVR
---
102
104
106
108
Reserved, do not access
Reserved, do not access
Reserved, do not access
10A 111
112
114
116
118
11A
11C
11E
IUSC-0 Dreg
IUSC-0 Dreg
IUSC-0 Dreg
IUSC-0 Dreg
---
IUSC-0 Dreg
IUSC-0 Dreg
IUSC-0 Dreg
---
IUSC-0 Dreg
IUSC-0 Dreg
IUSC-0 Dreg
---
IUSC-0 Dreg
---
DICR
CDIR
SDIR
TDIAR
---
TBCR
TARL
TARU
---
NTBCR
NTARL
NTARU
---
RDMR
---
Reserved, do not access
Reserved, do not access
120 129
12A
12C
12E
130 139
13A
13C
13E
140 181
182
184 19D
19E
Reserved, do not access
Reserved, do not access
IUSC-0 Dreg
RDIAR
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Address
Offset
Area (item)
Accessed
Register
Accessed
Notes
(in hex)
---
---
Reserved, do not access
1A0 1A9
1AA
1AC
1AE
1B0 1B9
1BA
1BC
1BE
1C0 1FF
200
202 3FF
IUSC-0 Dreg
IUSC-0 Dreg
IUSC-0 Dreg
---
IUSC-0 Dreg
IUSC-0 Dreg
IUSC-0 Dreg
---
RBCR
RARL
RARU
---
NRBCR
NRARL
NRARU
---
Reserved, do not access
Reserved, do not access
Interrupt Acknowledge (read only)
Aliases of 200
IUSC-0
IUSC-0
IUSC-1
IUSC-1
IUSC-1
IUSC-1
IUSC-2
IUSC-2
IUSC-2
IUSC-2
IUSC-3
IUSC-3
IUSC-3
IUSC-3
As Above
400 5FF
600
602-7FF
Same registers as addresses 000 1FF
Interrupt Acknowledge (read only)
Aliases of 600
As Above
---
800 9FF
A00
A02 BFF
Same registers as addresses 000 1FF
Interrupt Acknowledge (read only)
Aliases of A00
As Above
C00 DFF
E00
E02 FFF
Same registers as addresses 000 1FF
Interrupt Acknowledge (read only)
Aliases of E00
---
---
PLD Area
RTCU
RTCL
See “PLD Registers” for details.
Real Time Clock Upper
Real Time Clock Lower
LED Control
1000
1002
1004
LEDC
1006
Alias of 1004
1008
LIFC1
LIFC2
Port-1 Line I/F control
Alias of 1008
Port-2 Line I/F control
Alias of 100C
100A
100C
100E
1010
1012
LIFC3
Port-3 Line I/F control
Alias of 1010
1014
1016
LIFC4
Port-4 Line I/F control
Alias of 1014
1018
PLD_CNTRL
PLD_STATUS
Control Bits
Alias of 1018
Status bits
Alias of 101C
101A
101C
101E
Unused
1020 1FFF
[1] Sreg =
[2] Dreg =
Serial Register
DMA Register
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PLD Registers:
Offset Reg Name
R/W
Valid Bit Descriptions
Bit
Reset
Values
(Hex)
0000
1000
RTCU
R/W
D15..0
Control Bits: Read/Write only as a 16 Bit word.
Real Time Clock
Upper
15
14
13
MPP
12
11
10
9
EXT
8
ME
7
6
X
5
X
4
H4
3
H3
2
H2
1
H1
0
H0
Msk1 MP
MPO IntEN SE
Msk0
Msk1:
MP:
On writes, set this bit to mask bits 14..8. This prevents previous settings of bits 14..8 from being changed.
Minute Pulse (read only): Current State of Minute-Pulse signal (at the time of the read).
MPP:
Minute Pulse Pending (read only): This bit is set to the same state as the MPO bit (when the MPO bit is written). When the MPO is
written high, this bit goes low (=0) when the next selected Minute-Pulse edge occurs.
MPO:
Minute Pulse Once: When low (=0), the selected Minute-Pulse edge always resets the Seconds value. When high (=1) the RTC
increment is inhibited, then when the first selected Minute-Pulse edge occurs, the Seconds value will be zeroed, the MPP bit will be
cleared and the RTC increment will be enabled. All subsequent Minute-Pulses edges will be ignored.
Clock Interrupt Enable: Enable an interrupt to occur on each clock increment pulse. The Interrupt is cleared by reading (or writing) the
RTC Lower Word (the Minutes/Seconds counter) or by disabling the interrupt. There is a dedicated interrupt signal to the Coldfire for
the RTC interrupt.
IntEN:
SE:
EXT:
ME:
Seconds-Pulse Edge Select: Selects the edge (of the Seconds-Pulse) which causes the RTC increment, 0=falling, 1=rising.
External Time Base Select: 0=Internal Timebase (1 Hz), 1=External Timebase.
Minute Edge select: Selects the edge (of the Minute-Pulse) which causes the RTC Seconds counter to be reset, 0=falling, 1=rising
Msk0:
H4..0
On writes, set this bit to mask bits 6..0. This prevents previous settings of bits 6..0 from being changed.
Hours Setting, or reading (a number between 0 and 23).
1002
RTCL
R/W
D15..0
Control Bits: Read/Write only as a 16 Bit word.
0000
Real Time Clock
Lower
15
Msk
1
14
X
13
M5
12
M4
11
M3
10
M2
9
M1
8
M0
7
Msk
0
6
X
5
S5
4
S4
3
S3
2
S2
1
S1
0
S0
Msk1:
M5..0:
On writes, set this bit to mask bits 14..8. This prevents previous settings of bits 14..8 from being changed.
Minute Setting, or reading (a number between 0 and 59)
Msk0:
S5..0
On writes, set this bit to mask bits 6..0. This prevents previous settings of bits 6..0 from being changed.
Second Setting, or reading (a number between 0 and 59).
1004
LEDC
R/W
D15..0
Control Bits: Read/Write only as a 16 Bit word.
LED Control
Register
Auto Flash Mode
Direct Mode
0000
15
X
14
X
13
X
12
X
11
X
10
X
9
X
8
X
7
6
5
P2
4
P1
3
2
1
P2
0
P1
P4
P3
P4
P3
P4, P4, P2, P1
Direct Mode:
Auto Flash Mode:
X=
Port numbers
1= LED on, 0 = LED off
1=LED on for 40ms / off for 40ms, 0=No effect
Don‟t care, fixed to 0.
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1008
100C
1010
1014
LIFC1,2,3,4
Line Interface
Control
R/W D15..0
Control Bits: Read/Write only as a 16 Bit word.
15
X
14
DCDC
13
DCDS
12
ES
11
FSM
10
CTSC
9
8
7
RTS
6
DC
5
42W
4
DM
3
2
1
SP1
0
SP0
0007
CTSM1
CTSM0
SPT SP2
1008= Port 1
100C = Port 2
1010 = Port 3
1014 = Port 4
Important Note: These control bits are transferred to ALL the Line Interface PLD‟s by a serial interface. On each write to any of the 4 control registers, a serial
transfer is started. The transfer takes about 16uS to complete. During this time NO write can occur to any of the 4 registers. A Busy signal is available to indicated
that the transfer is in progress. (See the PLD_STATUS Register, below).
Basic Line Mode Control bits:
SP[2..0] SP508 Line Mode setting bits: See information in SP508 Data sheet. Power-up state=[111].
SPT
SP508 Terminator Enable:
0=disable terminator, 1=enable terminator
Duplex Control and RTS Pin Control bits:
DM
42W
DC
RTS
Notes:
Duplex Mode selection:
4/2 Wire mode selection:
Duplex Control Source:
RTS Pin Source Selection:
0=Full, 1=Duplex.
0=2wire (or ½ Duplex), 1=4wire (or Multi-Drop Slave).
0=RTS signal from IUSC, 1=TXComplete signal from IUSC.
0=RTS signal from IUSC, 1=TXComplete signal from IUSC.
When Full Duplex mode is selected the “42W” and “DC” bits settings can be changed but are ignored.
Triggered/Gated Transmission Control Bits
CTSM and FSM
FSM
CTSM[1]
CTSM[0]
FSYNC# pin on IUSC
CTS# pin on IUSC
X
0
0
X
0
X
---
Driven from Line Interface CTS signal
---
Driven directly from Trigger input
signal (inverted)
0
0
1
---
CTS pulsed low for 15 clock cycles [1] as follows…
If CTSC=0: clocked by Transmitter clock.
If CTSC=1: clocked by PLD clock (14.66 MHz)
CTS pulsed low for 5 or 1 Transmitter clock cycles
[1][2]
1
0
1
1
0
FSYNC Pulsed for 5 or 1 Transmitter
clock cycles [1][2]
---
X
CTS is turned ON when appropriate TRG bit is ON
(see TRG bits in the PLD_CNTRL register, below)
[1] Whenever the appropriate edge of the Trigger input signal occurs.
[2] The choice of 1 or 5 clock cycles is determined by the previous application of the “First Setup” pulse (Port3 of the IUSC device).
The 5 clock period FSYNC/CTS pulse only occurs once on the first Trigger edge, all following Trigger edges produce a 1 clock FSYNC/CTS pulse.
CTSC
ES
CTS Pulse Clock Source:
Trigger Edge selection:
1=Internal PLD Clock, 0=Transmitter Clock [TxC]
0=falling edge, 1=rising edge
Gated Reception Control Bits
DCDS
DCDC
IUSC DCD Select: 0=Line Interface DCD signal, 1=Driven by the appropriate TRG bit (in the PLD_CNTL register).
DCD Clocked:
0=Not clocked, 1=IUSC DCD is synchronized to the falling edge of RxC. (Valid for either of the above DCDS selections).
For Future Use
Reserved for future use, Set to zero for Writes, zero on Reads
X
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1018
PLD_CNTRL
Control Bits
R/W D15..0
Control Bits: Read/Write only as a 16 Bit word.
15 14 13 12 11
IM[3] IM[2] IM[1] IM[0] TRG[3] TRG[2] TRG[1] TRG[0]
0000
10
9
8
7
X
6
X
5
4
3
2
1
0
IABT SMIE SR[3] SR[2] SR[1] SR[0]
SR[3..0] IUSC Software Reset: SR[0]=Port1… SR[3]=Port4. Reset is asserted while bit is set to 1. Also, the “Line Interface Control”bits for the given
Port, are set back to their power-up state.
SMIE
IABT
Serial Master Interrupt Enable: This bit will enable all IUSC interrupts. If the SMIE bit is turned OFF, the Serial interrupt signal to the
Coldfire are turned off, but the Interrupts Status bits remain valid.
IUSC DMA operation Abort: Setting this bit will abort any DMA transfer underway, and is mainly used to abruptly stop autonomous IUSC
operations.
TRG[3..0] TXRX GO: Used to enable the Transmission and Receiver via a hardware signal. These bits cause the CTS and the DCD signal to go ON. (See
the CTSM[] and DCDS bits above).
IM[3..0] Map IUSC Interrupts: to Coldfire Interrupts. IM[p]=0 selects Interrupt-1, IM[p]=1 selects Interrupt-2. Where [p] is the port number (0to3).
Interrupt Information
All the IUSC interrupts are “gated” together and are presented on Coldfire External Interrupt pin #1 or pin #2 (as selected by the IM bits).
All other interrupts (only the Real-Time Clock at this time) are presented to the Coldfire External Interrupt pin #3.
For Future Use
X
Reserved for future use, Set to zero for Writes, zero on Reads
101C
PLD_STATUS Read D15..0
Status Bits Only
Control Bits: Read only as a 16 bit word.
15 14 13 12 11
Busy PBL Rev[2] Rev[1] Rev[0] ID[1]
0900
(initially)
10
9
8
RIS
7
6
5
4
3
2
1
0
ID[0]
IS2[3] IS2[2] IS2[1] IS2[0] IS1[3] IS1[2] IS1[1] IS1[0]
IS1[3..0] Interrupt Status (Interrupt-1): IS1[p]=1 Interrupt active. Where [p] is the port number (0to3).
IS2[3..0] Interrupt Status (Interrupt-2): IS2[p]=1 Interrupt active. Where [p] is the port number (0to3).
RIS
Interrupt Status (RTC):
1
Interrupt active.
ID[1..0] PLD ID:
Rev[3..0] PLD Revision:
Begins at “1” and increments.
Begins at “1” and increments.
PBL
Busy
Push Button Latch: = 1 whenever the pushbutton was previously pressed (self-cleared at the end of the Read).
LIFC Register Busy:This bit goes high (=1) whenever a Line Interface Control Register is written, and goes low (=0) whenever the register is
available to be used again. (See the LIFC register above).
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System Block Diagrams
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Port Settings, Clock Setup and General Settings
Required [conditions]
Optional [conditions]
(blank) means setting parameter is not required for the mode.
TBD means To be Determined at a later date.
Async
MonoSync
BiSync
Trans-BiSync
HDLC
Serial Mode (smode)
BHN_PortSettings
smode
Required
Required
Required
TDB
Required
TDB
Required
TDB
misc_receiver
TDB
TDB
misc_transmitter
r/txclk.ref_freq
r/txclk.bps_error
r/txclk.bps
r/txclk.bps_frac
r/txclk.async_div
r/txclk.dpll_div
r/txclk.ctr_div
r/txclk.enc_dec
r/txclk.clk_tree.A
r/txclk.clk_tree.B
r/txclk.clk_tree.C
r/txclk.clk_tree.D
r/txclk.clk_pin
tx_pre_idle.pre_pat
tx_pre_idle.pre_len
tx_pre_idle.tx_idle
line_mode
TDB
TDB
TDB
TDB
TDB
Optional [1]
Optional [1]
Optional [1]
Optional [1]
Required
Optional [1]
Optional [1]
Optional [1]
Optional [1]
Optional [1]
Optional [1]
Optional [1]
Optional [1]
Optional [1]
Optional [1]
Optional [1]
Optional [1]
Optional [1]
Optional [1]
Optional [1]
Optional [1]
Optional [2]
Optional [3]
Required
Required
Optional [4]
Optional [5]
Required
Required
Optional
Optional [2]
Optional [3]
Required
Required
Optional [4]
Optional [5]
Required
Required
Optional
Optional [2]
Optional [3]
Required
Required
Optional [4]
Optional [5]
Required
Required
Optional
Optional [2]
Optional [3]
Required
Optional [3]
Required [1]
Required
Required
Optional [4]
Optional [5]
Required
Optional [5]
Required
Required
Required
Optional
Optional
Optional
Required
Required
Required
Required
Required
Required
Required
Required
Required
Required
Required
Required
Required
Required
Required
Required
Required
Required
Required
Required
Required
Required
duplex mode
sync_addr.tx0
sync_addr.tx1
sync_addr.tx_len
Required
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Async
MonoSync
Required
BiSync
Trans-BiSync
Required
Required
Required
Optional
Required
HDLC
Serial Mode (smode)
BHN_PortSettings
sync_addr.rx0
sync_addr.rx1
sync_addr.rx_len
sync_addr.strip_sync
dbits.t/rx
Required
Required
Required
Optional
Required
Required
Optional
Required
Optional
Required
Required
Required
tx_frac_stop
parity.t/rx
Required
Required
crc.tx_type
Required
Required
Required
Required
crc.tx_start
crc.tx_mode
crc.rx_type
crc.tx_start
tx_trig_gate
Optional [6]
Optional [6]
Optional [6]
Optional [6]
Required
Optional [6]
Optional [6]
Optional [6]
Optional [6]
Optional [6]
Optional [6]
Optional [6]
Optional [6]
Optional [6]
Optional [6]
Optional [6]
Optional [6]
Required
Required
rx_gate
Required
Required [1]:
Optional [1]:
Must be NRZ or NRZ_INV
Needed if a clocking source feeds either of the Baud Rate Generators. If the Receiver or Transmitter are clocked directly from certain Line
Interface signals (RxC or TxC setup as inputs) and those Interface signals are setup as outputs, then the indicated parameters are required.
Required only when the DPLL is part of the clocking tree setup.
Required only when either Counter (CTR-0 or CTR-1) is directly clocking the Receiver, Transmitter, RxC or TxC signals.
Only required when the clk_tree.A setting is CLK_DPLL (which is generally only used with Synchronous modes).
Only required when the clk_tree.A or clk_tree.C setting selects a Baud Rate generator.
Optional [2]:
Optional [3]:
Optional [4]:
Optional [5]:
Optional [6]:
Only required if CRC is enabled.
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IUSC Clocking Logic:
The following diagram was scanned from the IUSC manual page 4-3 and corrections have been made. Do not use the diagram from the IUSC manual, use the
corrected version we have provided below.
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Appendix
Blue Heat/Net Sync Specifications
Operating Environment
4 port model:
0ºC to 60ºC (32ºF to 158ºF)
Communications
Baud Rates:
Synchronous:
Up to 9.216 Mbps with internal reference clock, up to 10 Mbps with
external reference clock.
230.4 Kbps
Asynchronous:
information.
ESD Protection
15kV
Power
Rev A models: 5V (2.5A) power input using a DC barrel or Phoenix screw terminal connector.
Rev B models: 5V (2.5A) to 26V (450mA) power input using a DC barrel or Phoenix screw
terminal connector.
Connectors
Serial I/O: DB25 Female
Auxiliary I/O: DB9 Female
DC Power: Standard DC Power connector or Phoenix screw terminal
Ethernet: RJ45
Dimensions
Blue Heat/Net Sync
Length: 133 cm/5.24 inches
Width: 244 cm/9.61 inches
Height: 43 cm/4.69 inches
Compliant with 1U 19” rack specifications
Cable and Power Supply Options
Blue Heat/Net Sync products are available in a variety of configurations. Please contact the
number.
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Protocol Descriptions
The Blue Heat/Net Sync supports a variety of protocols. The following is a brief explanation of
each and how they are implemented.
ARP
Address Resolution Protocol, a method used to find a unit‟s Ethernet MAC address from its
Internet address.
BOOTP
Bootstrap Protocol, a protocol that allows a unit to boot from the network instead of using
information stored on the Blue Heat/Net Sync (typically in Flash memory).
DHCP
Dynamic Host Configuration Protocol, a protocol that provides a means to dynamically
allocate IP addresses to computers on a local area network. The system administrator assigns
a range of IP addresses to DHCP and each client device on the Local Area Network requests
an IP address from the DHCP server. The request and grant process uses a lease concept with
a controllable time period. The Blue Heat/Net Sync offers this as a configurable option; it
can either be turned on or the user can set a fixed IP on the unit.
HTTP
HyperText Transfer Protocol, a standardized Protocol that Web Browsers use to connect to
web pages. It is used to provide web based configuration tools on the Blue Heat/Net.
IP
Internet Protocol, a common addressing scheme for modern networks. Used in conjunction
with TCP to form TCP/IP (see below)
RARP
Reverse Address Resolution Protocol, a method to find a unit‟s Internet address from a MAC
or Ethernet address.
TCP
Transmission Control Protocol, a lossless protocol, requiring a handshake to insure that data
is not lost during transmission. Used in TCP/IP to form the main data transfer pathway
between Blue Heat/Net Sync units and the host computer.
Telnet
A terminal-protocol that can be run over TCP/IP to connect to a remote unit. It is one of the
methods used to configure the Blue Heat/Net Sync unit.
TFTP
Trivial File Transfer Protocol, a protocol used to download firmware to the Blue Heat/Net.
UDP
User Datagram Protocol, a protocol used when handshake is not critical. It is used by TFTP
(see above) and for auto discovery of the units.
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Pinouts
DB-25 Female Pinouts
DB25F
Line Mode
Pin #
Signal Name
V.28 in brackets
V.35
EIA-530
RS232
(V.28)
EIA-530A
X.21
(V.11)
V.35 [4]
V.35 [4]
V.35 [4]
V.35 [4]
Hi-Z
V.28
Hi-Z
V.28
Hi-Z
V.28
Hi-Z
V.28
Hi-Z
V.11
Hi-Z
V.28
Hi-Z
V.28
Hi-Z
V.28
Hi-Z
V.28
Hi-Z
V.28
Hi-Z
V.28
Hi-Z
V.28
Hi-Z
V.28
Hi-Z
V.28
V.28
V.28
V.11
V.11
TX+
TX- (TX)
RX+
RX- (RX)
DTR+
DTR- (DTR)
RTS+
RTS- (RTS)
CTS+
CTS- (CTS)
DSR+
14
2
16
3
23
20
19
4
13
5
21
6
10
8
11
24
9
17
15
12
22
18
7, 1
V.11
V.11
V.11
V.11 [1]
V.11 [1]
V.11
V.11 [1]
V.11 [1]
Hi-Z
V.11 [1]
V.11 [1]
V.11
V.11
V.11
V.11
V.11
V.11
V.11
V.11
V.11
V.10
V.11
V.11
V.11
V.11
Hi-Z
V.10
V.11
V.11
V.11
V.11
V.11
V.11
V.11
V.11
V.11
DSR- (DSR)
[5]
[5]
DCD/RX_SYNC_IN+
DCD/RX_SYNC_IN-
TXC+ [2]
(DCD) V.28
V.11
V.11
V.11
V.35 [4]
V.35 [4]
V.35 [4]
V.35 [4]
NC
V.11 [2]
V.11 [2]
V.11 [2]
V.11 [2]
NC
V.11 [2]
V.11 [2]
V.11 [2]
V.11 [2]
NC
V.11 [2]
V.11 [2]
V.11 [2]
V.11 [2]
NC
TXC- [2] (TXC)
RXC+ [2]
RXC- [2] (RXC)
(TXC)
[6]
RX_SYNC_OUT-
RI (RI)
TX_TRIGGER
V.28
NC
NC
NC
V.28
V.10
V.28
V.10
Hi-Z
[7]
[7]
[7]
[7]
[7]
SR
SR
SR
SR
SR
SR
[1]
120 ohm resistor applied between the (+) and (-) signals.
120 ohm resistor applied between the (+) and (-) signals when the signal is an input.
This signal can be programmed to be a input or an output.
V.35 Termination Network is applied between (+) and (-) signals.
External Sync input used to enable or disable the receiver. This pin is used in external Sync
mode. A logical low will enable the receiver.
This output indicates that the Receiver has received a RX Sync character. It could also be used
as a general purpose I/O signal.
See the table titled Auxiliary Connector under TX_TRIGGER for details.
[2]
[3]
[4]
[5]
[6]
[7]
NC means DO NOT CONNECT.
Signal Description:
Mode
V.10
V.11
V.28
V.35
Equivalent Standard
RS-423
RS-422 / RS485
RS-232
Electrical
Typical Voltage
+/- 5VDC
1.5VDC to 4.5VDC
+/-12VDC
Single ended
Differential
Single ended
Differential
V.35
550mVDC
Table 9: DB-25 Female Pinouts
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DB-9 Female Pinouts
DB9F Signal Name [1]
Pin
Functional
Notes
1
RTC_Clear
Clears and holds the seconds count of the Real Time Clock at
00.
Provides the external time base for the Real Time Clock.
Internal time base is 1Hz
[3], [6]
[3], [5]
2
RTC_Seconds
3
4
5
6
7
8
9
GND
EXT_REF_CLK
GND
TX_TRIGGER_P1
TX_TRIGGER_P2
TX_TRIGGER_P3
TX_TRIGGER_P4
Signal reference for all signals
0-20MHz clock input
[2]
Signal reference for all signals
Transmission trigger for port 1
Transmission trigger for port 2
Transmission trigger for port 3
Transmission trigger for port 4
[3], [4], [5]
[3], [4], [5]
[3], [4], [5]
[3], [4], [5]
[1] All signals are inputs.
[2] Electrical properties for External Reference clock input:
+/- (1-10)Vpp AC sine wave
+/- (3.3-10Vpp square wave.
10-20MHz Frequency range.
Capacitive coupled input.
Must be referenced to GND pin.
TTL compatible. For example 0-3.3V or 0-5V will work.
[3] Electrical properties:
+/- (3.3- 10)Vpp pulse.
Minimum pulse width is 100ns seconds.
Capacitive coupled input.
Must be referenced to GND pin.
TTL compatible. For example 0-3.3V or 0-5V will work.
[4] Used for Asynchronous transmissions. When the mode is enabled, the Blue Heat/Net Sync will
transmit exactly one byte of data when the TX_TRIGGER input changes state. These same
signals are available on the individual DB25 port connectors.
[5] The input is edge sensitive and can be configured for negative or positive edge sensitivity.
[6] The input is level sensitive and can be configured for 1 or 0 level sensitivity.
Table 10: DB-9 Female Pinouts
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Multi-drop Communications Using V.11 / RS422/RS485 Line Modes
When wiring multi-drop RS-485 networks, it is necessary to wire the devices in a “Daisy
Chain”, they must not be wired with a “Star” topology, see diagram.
Rack Mount Option:
Blue Heat/Net Sync can be rack mounted using the option rack mount kit part number MSG029.
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Default Settings
Network Settings
Blue Heat/Net Sync IP address 192.168.42.1
Server IP address
Gateway IP address
Subnet Mask
0.0.0.0 (used for firmware downloads)
0.0.0.0
255.255.255.0
Broadcast IP address
255.255.255.255 (used by the bootp process)
Domain Name Server IP address: 0.0.0.0 (used for firmware downloads)
Domain Name
Host Name
TCP Port
blueheat.net
BHNssssssss
49152 (0xC000)
0.0.0.0
(where ssssssss is the BHN serial number)
DNS IP
Boot Settings
Default enabled:
Boot from Flash
Default disabled:
use BOOTP
use TFTP
Delay: 30 (seconds)
SCM Operation Settings
Password:
Password Prompting:
Loader Filename:
password
enabled
BHNloader_vvv.gz
(where vvv is the version number of the Loader, current at the time the unit was manufactured).
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Common Configuration Setups
Static IP Setup
In some networking environments it is best to have the IP address set to a fixed value. The
advantage is that since it is fixed, connecting to it can be a lot simpler.
Static IP is often the best choice if you are trying to connect via WAN or through a Firewall. It
can be difficult to resolve the Blue Heat/Net Sync‟s IP address if you use DHCP in this instance.
The default configuration is a static IP of 192.168.42.1. In most cases this will not be the address
you want to use in your network. You can change it using two different methods:
Serial Configuration Manager (SCM)
A direct serial connection to on of the serial ports on the Blue Heat/Net Sync.
Or
Web Configuration Manager (WCM)
Using a web browser like Internet Explorer to connect to the unit.
Refer to the manual sections for specific details on using the SCM and WCM.
Example:
You want to configure a static IP on a Blue Heat/Net Sync of 198.182.196.15. The network‟s
server is at 198.182.196.1 and the gateway is 198.182.196.2. The subnet mask is 255.255.255.0.
Using SCM
Log onto the Blue Heat/Net Sync. There is no login necessary if using SCM. The default
password for the SCM is password.
Enter net net=198.182.196.0. This will set 198.182.196.0 to the server, gateway and the unit‟s IP
in one step.
Enter net my_ip=15. This will set the unit‟s IP to 198.182.196.15.
Enter net server_ip=1. This will set the server IP to 198.182.196.1.
Enter net gateway_ip=2. This will set the gateway IP to 198.182.196.2.
Enter net subnetmask=255.255.255.0. This will set the subnet mask.
Enter net dns_ip=3. This will set the DNS IP to 198.182.196.3
Enter net dhcp=no. This will turn off DHCP on the unit.
Enter save. This will save the configuration set above to flash memory.
Enter exit. The unit will reboot using the new settings.
Using WCM
Connect to the Blue Heat/Net Sync using a web browser by entering the current IP of the unit in
the address.
Log on by supplying the username and password. The default login is wcm and the default
password is password.
Select the Blue Heat/Net Sync Settings page and fill in the server IP, Blue Heat/Net Sync IP,
Gateway IP, DNS IP and subnet mask as defined above.
Ensure the Use DHCP option is set to no
Click on the Save to Flash button to store the changes.
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DHCP Setup
In many modern networks IP numbers are not static but are automatically assigned by a DHCP
server and can change over time or on each power up.
DHCP must be enabled on the Blue Heat/Net Sync because it is shipped to use a default static IP
(192.168.42.1)
Using SCM
Log onto the Blue Heat/Net Sync. The SCM does not require a login. The default password for
the SCM is password.
Enter net dhcp=yes. This will turn on DHCP on the unit.
Enter net dns_ip=3. This will set the DNS IP to 198.182.196.3
Enter save. This will save the configuration we just set to flash memory.
Enter exit. The unit will reboot using the new settings.
How the Blue Heat/Net Sync Boots Up
Each time the Blue Heat/Net Sync is powered-up or rebooted with an appropriate command, a
certain sequence of software execution occurs.
The Booter runs from flash memory first. Its job is to perform the following:
Setup the embedded processor
Validate at least one of the redundant Loaders (via a CRC check).
Load a validated Loader into RAM memory.
Run the Loader.
If the Booter discovers that both Loader programs are defective (erased or faulty CRC
calculation), an error code is displayed on the LEDs of the Blue Heat/Net Sync.
The Loader runs from RAM memory. Its job is to perform the following:
o
o
Update any required CDS items.
Determine if the SCM application will be entered. This is accomplished by
scanning the designated serial ports, for a period of time, to determine if a
correct password is entered. If the password is found the SCM application will
settings).
o
Locate, load and run an Operating System (uClinux). (As shown in the
following boot-up flow chart).
o
o
Run the main Operating System (uClinux).
Operating System launches port personality default ctid
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Bootup Sequence
Start
Decompress
uClinux from Flash
to SDRAM
Boot from
Flash
Enabled?
Y
Y
Decompress
OK
N
N
Obtain boot
information from
Bootp Server
Bootp
Enabled?
Server
Responds
Y
N
N
Update CDS (RAM copy)
Information
Y
(filename & IP address)
Y
Attempt TFTP
Download
Decompress
Downloaded uClinux
into SDRAM
TFTP
Enabled?
Y
Success
N
N
N
Decompress
OK
Y
N
All Boot Modes
Disabled
Display Error on
LEDs
Run
uClinux
Y
Y
Boot Port
Personality
Enter
SCM
Figure 30: Bootup Sequence
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Flowchart of Special Operations Mode using the reset button
Power Up
Increment
Selection
Pressed
Reset
Yes
Button
Show
Selection State
On Port LEDs
Held
Reset
Button
Held
No
Wait for
Button
Release
Continue
Booting
Figure 31: Bootup Sequence via Reset Button
Asynchronous Communications Tutorial
The Blue Heat/Net Sync features four synchronous/asynchronous serial communication ports.
Asynchronous communication is a simple, cost effective means of terminal serial
communication. For this reason, it is widely used for communications on personal computers,
bar codes readers, printers, terminals and much more. The following documention represents a
basic tutorial for asynchronous communications. For a tutorial on synchronous communications,
In asynchronous serial communication, the electrical interface is held in the idle position
between characters, also referred to as “mark”. A change in signal level (known as space level)
indicates the start of transmission of a character. The receiver recognizes this change as a “start
bit”. Once the start bit has been sent, the transmitter sends the actual data bits. In typical
asynchronous communications there may be 5, 6, 7, or 8 data bits, depending on the application.
Both the receiver and the transmitter must be set to the same number of data bits, baud rate and
stop bits. Stop bits can be 1, 1.5, or 2 bit periods in length. When the transmitter has sent all the
data bits, it sends a stop bit. This stop bit signals to the receiver that the data has finished
transmission. The stop bit is the same state as the idle or mark state.
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Figure 32: Typical Asynchronous Date Frame
Serial Line Interface Tutorial
RS-232 Line Interface:
RS-232 is the simplest, least expensive line interface standard, the Sipex tranceivers used on the
Blue Heat/Net Sync refer to RS232 as V.28 mode. It is also referred to as EIA232 and TIA/EIA-
232. The RS-232 specification signals levels of +3V to +15V for a logic 0 or Space, and -3V to -
15V for a logic 1 or Mark. The Blue Heat/Net Sync has RS-232 signal levels with a typical
range of +/- 8 Volts. The maximum cable length you can use with RS-232 is dependant on a
number of factors including:
Baud rate: The higher the baud rate, the shorter the cable length must be.
Cable quality: Quality largely refers to the capacitance of the cable. A higher capacitance
(usually specified as pF or pico Farads per foot) dictates a lower baud rate, and a shorter
maximum length. Low capacitance computer cables for RS-232 applications are available from
all wire and cable suppliers.
You can usually operate with cable lengths of up to 100 feet (30 m) at baud rates up to 115.2
Kbps using low capacitance cable. For higher baud rates such as 230.4 Kbps and up, we
recommend keeping the cable lengths to within 25 feet (7.6 m).
The TIA/EIA232 specification specifies two connectors: the DB-25 and the DB-9. Each of these
RS-232 (V28) pinout.
Differential Line Interfaces:
The Blue Heat/Net Sync features Sipex SP508 multi-protocol transceivers. These transceivers
features the following differential line standards.
V.11: A differential line interface with signal levels compatible with RS-485 and RS-422.
V.10: A single ended line interface that can be wired such that it will have some of the noise
cancelling features of RS485 (V.11). This interface is also called RS-423.
V.35: A differential line interface that operates in a current loop. The electrical levels are about
+/- 550mV.
RS485/RS422/V.11 Details
V.11, RS-485, or TIA/EIA485, is a differential line interface standard capable of high baud rates
over long cables. The Sipex tranceivers used on the Blue Heat/Net Sync refer to RS-485 as V.11
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mode RS-485 is fully compatible with RS-422; which is considered a subset of RS-485.
The use of differential transmitters and receivers ensures RS-485 communications are reliable
and robust. This means two wires are used to transmit or receive a signal. One wire carries the
true or non-inverted signal; the other wire carries the inverted signal. The non-inverted signal is
labelled with a (+) and the inverted is labelled with a (-). The differential communication refers
to the (+) as “TXB” and the (-) as “TXA”.
Any noise injected into the wires is cancelled at the receiver, leaving only the original,
undistorted data signal. Twisted pair cables are always used in RS-485, this ensures that the
communications are robust and as error free as possible. RS-485 signal levels are between 0 and
5 Volts, the differential voltage can be as little as 200mV.
Differential can operate in three different modes: a 4-wire full duplex interface, 4-wire multi-
drop full duplex interface and a 2-wire half duplex interface. A full duplex (bi-directional)
differential communication interface requires at least four wires, two for transmit and two for
receive. A half duplex interface only requires two wires, this provides a cost effective cabling
solution.
Multi-drop is a great feature of RS-485. Multiple RS-485 devices can be bussed together in a
daisy chain type fashion to create a network. Up to 32 devices may be connected together on the
same network. In multi-drop networks, one of the devices (usually the computer) is designated
as the master, and all the other devices are designated as slaves. All communication is initiated
by the master. The master and slave designations are established by your communications
application.
Basic 4-Wire, Full Duplex Communications:
In a 4-wire RS-485 network, two devices are connected together, for example your Blue
Heat/Net Sync RS-485 port and an RS-485 device.
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Multi-drop 4-Wire, Full Duplex Communications:
In a multi-drop 4-wire differntial network, two to 32 devices are connected together. Note that
each RS-485 receiver counts as a device or “load”. In this multi-drop mode of communication, a
master slave protocol must be enforced, that is, all communication is initiated by the master, in
this case a Blue Heat/Net Sync. The communication is “full duplex”, meaning that receive and
transmit traffic occur on different pairs of wires. The Blue Heat/Net Sync can receive and
transmit data from/to a device at the same time.
Basic - Wire, Half Duplex Multi-drop Connection:
In a 2-wire differntial network, two to 32 devices are connected together. Note that each receiver
counts as a device or “load”. In this multi-drop mode of communication a master slave protocol
must be enforced, that is, all communication is initiated by the master, in this case a Blue
Heat/Net Sync. The communication is “half duplex”, meaning that receive and transmit traffic
occur on the same wire. The Blue Heat/Net Sync and devices can not receive data and transmit
data at the same time.
Note that the Receiver +/- and the Transmitter +/- signals are connected together. This is
performed at the DB-9 connectors. All communication between devices occurs over a single pair
of wires; this can lower the cost of wiring your network.
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Bus Contention on Differential Multi-drop Networks:
Bus contention occurs when two or more devices enabled on a bus attempt to run the bus to
opposite logic values. From the diagram above, we can see that there are multiple differential
transmitters (TXD) on the bus. To avoid the bus contention problem, the differential transmitter
features a tri-state, or high impedance mode controlled by an input pin (enable). Software and
hardware in the Blue Heat/Net Sync and the differential devices will always place its transmitter
into the high impedance mode when not transmitting. This feature is managed by the Blue
Heat/Net Sync and is fully transparent to your application.
For example, in a multi-drop network, the differential transmitter is enabled prior to the master
initiating transmission. When transmission is complete, the transmitter is placed in high
impedance mode. Each slave will receive that transmission from the master. (A protocol must be
in place to address, or select, the desired slave device, but that discussion is beyond the
intentions of this tutorial, and is entirely application dependent). When the slave device has
received the data, it will respond by enabling its transmitter and transmitting data onto the bus,
then placing its transmitter into high impedance mode, just as the master did.
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Termination Resistors in Differential Networks
Termination Resistors in Differential Networks:
Differential networks often benefit from the installation of termination resistors. Termination is
rarely required for lower baud rates, for example 9600 baud or less. However, differential
networks are transmission lines, and can suffer from the electrical effects of ringing, or
undershoot and overshoot, all of which can cause data errors, especially at higher baud rates, like
115.2 Kbps. Termination resistors should always be installed at the extreme ends of the network,
as close to the differential transceiver circuits as possible, as outlined in the diagram below.
NOTE: The Blue Heat/Net Sync features software
selectable termination.
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