PCA-6781 User Manual 18
2.18 External Keyboard Connector (CN18)
In addition to the Mini keyboard connector on the PCA-6781’s rear plate, there is an
additional onboard external keyboard connector, allowing for greater flexibility in sys-
tem design.
2.19 Audio Interface Connector (CN7)
The Audio Interface link is a 10 pin connector, the PCA-6781 can support Audio with
the addition of optional PCM-231A-00A1. Detailed pin assignment refer to Appendix
B.
2.20 PC/104 connector(CN12)
The PCA-6781 is equipped with a 8/16 bit ISA signal PC/104 connector for future
expansion.
2.21 IR connector(CN5)
This connector supports the optional wireless infrared transmitting and receiving
module. This module mounts on the system case. You must configure the setting
through BIOS setup. Detailed pin definition you will find in Appendix B.
2.22 Negative Power Input (CN17)
The PCA-6781 is equipped with a Negative Power Input connector providing -5 V
and -12 V power if your applications need.
2.23 +12 V FAN connector (CN22)
The PCA-6781 is equipped with a 3-pin FAN connector providing +12 V power for
CPU FAN. PCA-6781 is designed to Fanless, in general case, you won't need to con-
nect CN22.
Note! When using PCA-6781's IR function, please remove J5 jumper.
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