4-12
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Connector Pin Assignments
4
COM1 Connector (J15)
A standard DB9 receptacle is located on the front panel of the MCP750 to
provide the interface to the COM1 serial port. These COM1 signals are
also routed to J11 on the transition module. A terminal may be connected
to J15 or J11 on the transition module but not both at the same time. The
pin assignments for this connector is as follows:
Debug Connector (J19)
A 190-pin connector (J19 on the MCP750 base board) provides access to
the processor bus (MPU bus) and some bridge/memory controller signals.
It can be used for debugging purposes. The pin assignments are listed in
the following table.
Table 4-11. COM1 Connector J15
1
DCD
2
RXD
3
TXD
4
DTR
5
GND
6
DSR
7
RTS
8
CTS
9
RI
Table 4-12. Debug Connector (J19)
1
PA0
PA1
2
3
PA2
PA3
4
5
PA4
PA5
6
7
PA6
PA7
8
9
PA8
PA9
10
