Motorola CPCI-6115 用户手册

It is expected that many PMCs will include a serial debug port in addition to their other I/O. The 
CPCI-6115-MCPTM allows the COM1 and COM2 connectors to be redirected by means of 16:8 
multiplexers to the PMC I/O modules so the PMC I/O module faceplate area does not have to 
be used to provide a connector to access the debug port. A jumper on the CPCI-6115-MCPTM 
switches the COM1 connector between either the serial port originating on CPCI-6115 SBC or 
the serial port originating on PMC I/O module 1 (if any). Likewise for COM2 and PMC I/O 
module 2.

The redirected serial channels are routed to pins reserved on the host I/O connector. A serial 
port (if any) originating on the PMC located on the CPCI-6115 SBC is connected to the PMC 
I/O module through the standard 64 bits of PMC user I/O. The PMC I/O module must then loop 
the serial port back out on its host I/O connector.

This approach allows the serial debug port to be assigned to any of the 64 PMC user I/O lines. 
The mating PMC I/O module maps those lines onto the CPCI-6115-MCPTM serial channels. It 
is expected that future transition modules will reserve the same pins on the host I/O connector 
for this serial port function.

The two asynchronous port configuration diagrams are shown on the following pages. The 
asynchronous serial ports are configured through jumper settings. Serial ports 1 and 2 are 
routed through connector J5.

The next two figures illustrate the CPCI-6115 baseboard and CPCI-6115-MCPTM with the 
interconnections and jumper settings for DCE/DTE configuration on each serial port.

RIn

ring indicator

RTSn

request to send

Port 1

J5

J6

Port 2

J5

J11