Motorola CPCI-6115 manual Serial Port Redirection, Asynchronous Serial Port Diagrams

Asynchronous Serial Ports	Transition Module Preparation and Installation
Serial Port Signal Descriptions
RIn	ring indicator
RTSn	request to send

5.7.6.2Serial Port Redirection

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.

5.7.6.3Asynchronous Serial Port Diagrams

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.

Synchronous Port	Board Connector	Jumper Header
Port 1	J5	J6
Port 2	J5	J11

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.

CPCI-6115 CompactPCI Single Board Computer Installation and Use (6806800A68D) 107