82801CA Datasheet, PDF (282/521 Pages) Intel Corporation – I/O Controller Hub 3-S (ICH3-S)

LPC I/F Bridge Registers (D31:F0)
9.1.14
9.1.15
GPIOBASE—GPIO Base Address Register
(LPC I/F—D31:F0)
Offset Address:
Default Value:
Lockable:
58h–5Bh
00000001h
No
Attribute:
Size:
Power Well:
R/W
32-bit
Core
Bit
31:16
15:6
5:1
0
Description
Reserved.
Base Address—R/W. Provides the 64 bytes of I/O space for GPIO.
Reserved.
Resource Indicator—RO. Tied to 1 to indicate I/O space.
GPIO_CNTL—GPIO Control Register
(LPC I/F—D31:F0)
Offset Address: 5Ch
Default Value: 00h
Lockable:
No
Attribute:
Size:
Power Well:
R/W
8-bit
Core
Bit
Description
7:5 Reserved.
GPIO Enable (GPIO_EN)—R/W. This bit enables/disables decode of the I/O range pointed to by
the GPIO base register and enables/disables the GPIO function.
4
0 = Disable.
1 = Enable.
3:0 Reserved.
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Intel^® 82801CA ICH3-S Datasheet