Aplex-technology ACS-2645 Manual do Utilizador descarregar pdf (Página 51)

ACS-2645 User Manual

3.9 Examples of GPIO Programming

3.9.1 SuperIO Model: Winbond W83627UHG

GPIO OUT use GP 60~63

GPIO IN use GP 20~23

3.9.2 W83627UHG Access index port: 4Eh/4Fh

Index Address Port: 4Eh

Index Data Port: 4Fh

3.9.3 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

3.9.4 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

3.9.5 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

Example C code:

outportb(0x4E, 0x87);

Exit the extended function mode

Writing AAh to index address port will exit the extended function mode.

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