Acnodes PCH 3582 - Manual (Page 50)

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3.10 Examples of GPIO Programming
3.10.1 SuperIO Model: Winbond W83627UHG
GPIO OUT use GP 60~63
GPIO IN use GP 20~23
3.10.2 W83627UHG Access index port: 4Eh/4Fh
Index Address Port: 4Eh
Index Data Port: 4Fh
3.10.3 Configure GPIO register sequence
1. Enter the extended function mode
2. Select logic device number 8
3. Activate the logic device GPIO Port 6
4. Configure GPIO Port 6 register
5. Select logic device number 9
6. Activate the logic device GPIO Port 2
7. Configure GPIO Port 2 register
8. Exit the extended function mode