user manual

4-26 Computer Group Literature Center Web Site

Connector Pin Assignments

Serial Ports 1 and 2

The MVME2603/2604 provides both asynchronous (ports 1 and 2) and

synchronous/asynchronous (ports 3 and 4) serial connections. For the

MVME761-compatible versions of the base board, the asynchronous

interface is implemented with a pair of DB9 connectors (

COM1 and COM2)

located on the MVME761 transition module. The pin assignments are

listed in the following table.

18 GND SIO∗ VD20 PR_BUSY PMCIO17 18

19 Not Used AFD

∗ VD21 PR_PE PMCIO18 19

20 GND SLIN

∗ VD22 PR_SLCT PMCIO19 20

21 Not Used TxD3 VD23 PR_INIT

∗ PMCIO20 21

22 GND RxD3 GND PR_ERR

∗ PMCIO21 22

23 Not Used RTxC3 VD24 TxD1 PMCIO22 23

24 GND TRxC3 VD25 RxD1 PMCIO23 24

25 Not Used TxD3 VD26 RTS1 PMCIO24 25

26 GND RxD3 VD27 CTS1 PMCIO25 26

27 Not Used RTxC4 VD28 TxD2 PMCIO26 27

28 GND TRxC4 VD29 RxD2 PMCIO27 28

29 PMCIO30 Not Used VD30 RTS2 PMCIO28 29

30 GND –12VF VD31 CTS2 PMCIO29 30

31 PMCIO31 MSYNC

∗ GND MD0 GND 31

32 GND MCLK +5V MD1 VPC 32

Table 4-16. Serial Connections—Ports 1 and 2 (MVME761)

1SPnDCD

2SPnRxD

3SPnTxD

4SPnDTR

5 GND

Table 4-15. VMEbus Connector P2 (MVME761 I/O Mode) (Continued)