Appendix a, C166 controller ports & connections – Pioneer 2 User Manual
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Appendix A: Microcontroller Ports and Connections
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Appendix A
C166 Controller Ports & Connections
This Appendix contains pinout and electrical specifications for the external and internal ports and
connectors on the Pioneer 2 microcontroller board. These include an external serial port for P2OS/client
connections, two internal serial ports for host and accessory communications, each with switched five and
12 VDC power, an expansion bus, and a discrete user-I/O connector.
Note that all the internal connectors (IDC sockets) are numbered odd pins on top and even pins on the
bottom, from right to left, relative to the key (Figure A-1):
13
11
9
7
5
3
1
14
12
10
8
6
4
2
Figure A-1. Common IDC connector pinouts
Figure A-2. Pioneer 2 microcontroller ports and connectors
Console Serial Port
Use the Console DSUB-9 serial port connector for client connections to the Pioneer 2 servers and for P2OS
downloads. Only three pins are active: RS232-compatible pins 2 (TxD1), 3 (RxD1), and 5 (signal ground).
Table A-1 lists the cable connections for various host computers to this external serial port. Most direct
serial connections use a simple, straight-through cable, such as the one for a common PC. The
communication lines are shared with those on the internal P2OS serial port (see below).