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30 PCM-6890B User Manual
Keyboard and mouse connector
(CN11)
The mainboard provides a keyboard connector which supports
both a keyboard and a PS/2 style mouse. In most cases, especially
in embedded applications, a keyboard is not used. The standard
PC/AT BIOS will report an error or fail during power-on-self-test
(POST) after a reset if the keyboard is not present. The main-
board BIOS Advanced setup menu allows you to select "Present"
or "Absent" under the "System Keyboard" section. This allows
no-keyboard operation in embedded system applications without
the system halting under POST (power-on-self-test).
Keyboard and mouse connector (CN11)
Pin Signal
1 KB DATA
2 GND
3 MS DATA
4 N/C
5 KB CLOCK
6 Vcc
7 MS CLOCK
8 N/C