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Added RS-422 converter information and cable building information.

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This commit is contained in:
Joel Sherrill
1998-07-18 16:11:13 +00:00
parent cc3d33ac9b
commit fe05ec5ede
1 changed files with 59 additions and 8 deletions
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c/src/lib/libbsp/powerpc/dmv177/cable.doc
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@@ -24,6 +24,11 @@ The board is configured as follows:
DY-4 part number "OBYC3ASSY901080-004 Rev A" brings these out
to DB-9 female connectors. These were not used in this effort.
- A Z85C30 is used for the third and fourth serial ports. These are
RS-422 and may only be accessed via the P2 connector. These are
brought out to DB-25 male connectors. An RS-422 to RS-232 converter
was used to interface with these serial ports.
References
==========
@@ -31,16 +36,62 @@ References
- http://ahmed.egypt.com/electronics/serial
- DY-4 Documentation
RS-422 Converter
================
An RS-422 to RS-232 converter from B&B Electronics was used to
adapt the RS-422 signals so they could be used with a normal
RS-232 serial port. Here is the information required to purchase
one of these:
RS-232/RS-422 Converter: Model 422LCON
Power Supply: Model 422PS
B&B Electronics Manufacturing Company
707 Dayton Road
PO Box 1040
Ottawa, IL 61350
Voice: (815) 433-5100
FAX: (815)434-7094
Front Panel RS-232 Connection to a PC
=====================================
Board's DB-25 PC's DB-9 Color in
Channel A COM1 Shell
============= ============ =========
RX on pin 2 TX on pin 2 Red
TX on pin 3 RX on pin 3 Blue
GND on pin 7 GND on pin 5 Black
DTR on pin 20 DTR on pin 4 Brown
Board's DB-25 PC's DB-9 Color in
Channel A COM1 Shell
============= ============ =========
RX on pin 2 TX on pin 2 Red
TX on pin 3 RX on pin 3 Blue
GND on pin 7 GND on pin 5 Black
DTR on pin 20 DTR on pin 4 Brown
No other signals are used.
No other signals are used.
RS-422 Connection to a PC
=========================
This requires two cables with the converter connecting them.
P2 RS-422 to the RS-422/RS-232 Converter
========================================
Board's Converter's Color in
DB-25 RS-422 DB-25 Shell
=============== ============== ========
TXD_A on pin 2 RDA on pin 5 Red
TXD_B on pin 14 RDB on pin 17 Blue
RX_A on pin 3 TDA on pin 2 Brown
RX_B on pin 16 TDB on pin 14 Green
GND on pin 7 GND on pin 7 Black
Converter's PC's DB-9 Color in
RS-232 DB-25 COM1 Shell
=============== ============== ========
TX on pin 2 TX on pin 2 Red
RX on pin 3 RX on pin 3 Blue
GND on pin 5 GND on pin 5 Black
DTR on pin 4 DTR on pin 4 Brown
No other signals