User manual

APC-3X97A user manual
52
Chapter 4_____________________________
Examples of GPIO Programming
4.1 SuperIO Model: Winbond W83627UHG
 GPIO OUT use GP 60~63
 GPIO IN use GP 20~23
4.2 W83627UHG Access index port: 4Eh/4Fh
 Index Address Port: 4Eh
 Index Data Port: 4Fh
4.3 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
4.4 Read/write GPIO sequence
1. Enter the extended function mode
2. Select logic device number
3. Read/write GPIO register value
4. Exit the extended function mode
4.5 Software programming example
 Enter the extended function mode
Writing 87h to index address port twice will enter the extended function mode.
Example x86 assembly code:
mov dx, 4Eh
mov al, 87h
out dx, al
out dx, al
Example C code: