Aplex Technology AHM-6086A - Manual (Page 53)

AHM-6XX6A User Manual 52
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
3.10.4 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
3.10.5 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:
outportb(0x4E, 0x87);
outportb(0x4E, 0x87);