Global American 3301320, Руководство пользователя

Страница: 26 / 87

z
CN18: PS/2 6-pin Mini DIN Keyboard Connector
PIN Description
1 Keyboard Data
2 N/C
3 GND
4 5VSB
5 Keyboard Clock
6 N/C
Keyboard
Clock
5
6
N/C
3
GND
Keyboard
1
Data
2
N/C
4
5VSB
3.21 PS/2 Mouse Connectors
The 3301320 provides an external PS/2 mouse connector at CN16 and
an additional 4-pin connector at CN14 for an AT mouse.
z CN16: PS/2 6-pin Mini Din Mouse Connector
PIN Description
1 Mouse Data
2 N/C
3 GND
4 5VSB
5 Mouse Clock
6 N/C
Mouse
Clock
5
6
N/C
3
GND
Mouse
1
Data
2
N/C
4
5VSB
z
CN14: 4-pin Mouse Connector
PIN Description
1 Mouse Clock
2 Mouse Data
3 5VSB
4 GND
Mouse
Clock
1
Mouse
Data
2
5VSB
3
GND
4
3.22 Watchdog Timer
There are three access cycles of Watch-Dog Timer as Enable, Refresh
and Disable. The Enable cycle proceeds via READ PORT 443H
whereas the Disable cycle proceeds via READ PORT 045H. A
continued Enable cycle after a first Enable cycle means Refresh.
22