Computer Computer Hardware User Manual

4-7
System Resources
Resource List
ICH9 GPIO
Pin GPIO Type Function Power Description
GPIO1 I IDE cable detect 3.3V
GPIO6 I PCB version identify 3.3V
GPIO7 I PCB version identify 3.3V
GPIO8 O USB port power enable pin
1: enable USB port power
0:disable USB port power
3VSB Set to 1 at S0,S3
Set to 0 at S4,S5
GPIO13 I LPC_PME# 3VSB For SIO PME#
GPIO27 O Audio Amp volume control
Gain0
3.3V
GPIO28 O Audio Amp volume control
Gain1
3.3V
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