
25 Appendix B
B.1.2 Connectors
B.1.3 Connector Pin Definition
KB1 ~ 3 Connector
AT1 Connector
Connector Description
ISA1 ~ 6 16-bit ISA bus connector
KB1 KB-In, from CPU card K/B connector
KB2 ~ 3 KB-Out, 5-pin external K/B connector
AT1 AT power connector
ATX1 ATX power connector
CN1 PS-ON function, 3-pin connector to CPU card for ATX sig-
nal
CN2 8-pin alarm board power connector
CN3 3-pin +5V and +12V power connector
Pin Signal
1 KBCLK
2 KBDATA
3NC
4 KBGND
5 KBVCC
Pin Signal Pin Signal Pin Signal Pin Signal
1NC4-12V7 GND10+5V
2+5V5GND8 GND11+5V
3 +12V 6 GND 9 -5V 12 +5V
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