Motorola MVME2600 用户手册
MVME761-Compatible Versions
http://www.motorola.com/computer/literature
4-27
4
Serial Ports 3 and 4
For MVME761-compatible versions of the base board, the
synchronous/asynchronous interface for ports 3 and 4 is implemented with
a pair of HD26 connectors (J7 and J8) located on the front panel of the
transition module. The pin assignments for serial ports 3 and 4 are listed in
the following table.
synchronous/asynchronous interface for ports 3 and 4 is implemented with
a pair of HD26 connectors (J7 and J8) located on the front panel of the
transition module. The pin assignments for serial ports 3 and 4 are listed in
the following table.
6
SPnDSR
7
SPnRTS
8
SPnCTS
9
SPnRI
Table 4-17. Serial Connections—Ports 3 and 4 (MVME761)
1
No Connection
2
TXDn
3
RXDn
4
RTSn
5
CTSn
6
DSRn
7
GND
8
DCDn
9
SPn_P9
10
SPn_P10
11
SPn_P11
12
SPn_P12
13
SPn_P13
14
SPn_P14
15
TXCIn
16
SPn_P16
17
RXCIn
Table 4-16. Serial Connections—Ports 1 and 2 (MVME761)