Sbc-comm AMD SBC-770 User Manual download pdf (Page 51)

40 SBC-770 User Manual

Keyboard and PS/2 mouse connector

(CN18, CN13)

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 PS/2 mouse connector (CN18)

Pin Signal

1 KB DATA

2 MS DATA

3 GND

4 Vcc

5 KB CLOCK

6 MS CLOCK

Internal keyboard connector (CN13)

Pin Signal

1 KB CLOCK

2 KB DATA

3 N.C.

4 GND

5 Vcc

1 2 ... 46 47 48 49 50 51 52 53 54 55 56 ... 110 111

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Sbc-comm AMD SBC-770 User Manual Page 51