4-26
Computer Group Literature Center Web Site
Connector Pin Assignments
4
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)
1
SPnDCD
2
SPnRxD
3
SPnTxD
4
SPnDTR
5
GND
Table 4-15. VMEbus Connector P2 (MVME761 I/O Mode) (Continued)