diff options
| author | Joel Sherrill <joel.sherrill@OARcorp.com> | 1998-07-18 16:11:13 +0000 |
|---|---|---|
| committer | Joel Sherrill <joel.sherrill@OARcorp.com> | 1998-07-18 16:11:13 +0000 |
| commit | fe05ec5ede01ae8719297c192505d65e9ee5844b (patch) | |
| tree | 376e1d1a249cd7208e3fa05775f66bdc42d9b08a /c/src | |
| parent | Added information on the MC68681. (diff) | |
| download | rtems-fe05ec5ede01ae8719297c192505d65e9ee5844b.tar.bz2 | |
Added RS-422 converter information and cable building information.
Diffstat (limited to 'c/src')
| -rw-r--r-- | c/src/lib/libbsp/powerpc/dmv177/cable.doc | 67 |
1 files changed, 59 insertions, 8 deletions
diff --git a/c/src/lib/libbsp/powerpc/dmv177/cable.doc b/c/src/lib/libbsp/powerpc/dmv177/cable.doc index 1c958d696a..a1280c4aaf 100644 --- a/c/src/lib/libbsp/powerpc/dmv177/cable.doc +++ b/c/src/lib/libbsp/powerpc/dmv177/cable.doc @@ -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. + +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 -No other signals are used. + + 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 |