Advantech PCA-6773, User Manual

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21 Chapter 2 Installation
2.20 COM port connector (CN20,CN21)
The PCA-6773 provides two serial ports (COM1: RS-232 and COM2:
RS232) in one COM port connector. It provides connections for serial
devices (a mouse, etc.) or a communication network. You can find the pin
assignments for the COM port connector in Appendix C.
2.21 Keyboard and PS/2 mouse connector (CN26)
The PCA-6773 board provides a keyboard connector that supports both a
keyboard and a PS/2 style mouse. In most cases, especially in embedded
applications, a keyboard is not used. If the keyboard is not present, the
standard PC/AT BIOS will report an error or fail during power-on self-
test (POST) after a reset. The PCA-6773’s BIOS standard setup menu
allows you to select “All, But Keyboard” under the “Halt On” selection.
This allows no-keyboard operation in embedded system applications,
without the system halting under POST.
2.22 External KB/Mouse Connector(CN23)
In addition to the PS/2 mouse/keyboard connector on the PCA-6773’s
rear plate, there is an additional onboard external keyboard connector,
allowing for greater flexibility in system design.
2.23 Audio AC97 interface(CN12)
The Audio AC97 link is a 10 pin connector, the PCA-6773 can support
AC97 Audio with the addition of optional PCM-231A-00A1. Detailed
pin assignment refer to Appendix C.
2.24 IR Connector(CN13)
This connector supports the optional wireless infrared transmitting and
receiving module. This module mounts on the system case. You must
configure th setting through BIOS setup. Detailed pin definition you will
find in Appendix C.