2 gpio functions – HP DC5850 User Manual
Page 49
Technical Reference Guide
www.hp.com
4-15
System Support
4.6.2 GPIO Functions
SB700 Functions
The SB700 South Bridge provides various functions through the use of programmable general
purpose input/output (GPIO) ports. These systems use GPIO ports and associated registers of the
for the following functions:
■
Chassis and board ID
■
Front audio/USB detect
■
SPI data I/O
■
SATA hard drive LED
■
Flash security override
■
Serial port (COM 2) detect
SIO Controller Functions
In addition to the serial and parallel port functions, the SIO controller provides the following
specialized functions through GPIO ports:
■
Power/hard drive LED control for indicating system events (refer to Table 4-8)
■
Chassis and CPU fan control (PWM)
■
PCI Wake control
■
Power On/Power Good control
■
Power supply fan control
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