82801FB Datasheet, PDF (71/786 Pages) Intel Corporation – Intel I/O Controller Hub 6 (ICH6) Family

Signal Description
2.20 General Purpose I/O
Table 2-20. General Purpose I/O Signals^1,2 (Sheet 1 of 2)
Name
Type Tolerance Power Well
Description
GPO[49] OD O V_CPU_IO
GPO[48]
O
GPIO[47:42] N/A
GPI[41]
I
3.3 V
N/A
3.3 V
GPI[40]
I
GPIO[39:35] N/A
GPIO[34:33] I/O
GPIO[32]
I/O
(Desktop Only)
5V
N/A
3.3 V
3.3 V
GPI[31]
I
3.3 V
GPI[30]
I
3.3 V
GPI[29]
I
GPIO[28:27] I/O
GPI[26]
I
3.3 V
3.3 V
3.3 V
GPIO[25]
I/O
GPIO[24]
I/O
GPO[23]
O
GPIO[22]
N/A
GPO[21]
O
GPO[20]
O
(Desktop Only)
3.3 V
3.3 V
3.3 V
N/A
3.3 V
3.3 V
Core
Core
N/A
Core
Core
N/A
Core
Core
Core
Core
Core
Resume
Core
Resume
Resume
Core
N/A
Core
Core
This signal is fixed as output only and can instead be
used as CPUPWRGD.
This signal is fixed as output only and can instead be
used as GNT4#.
This signal is not implemented.
This signal is fixed as input only and can be used
instead as LDRQ1#.
This signal is fixed as input only and can be used
instead as REQ4#.
This signal is not implemented.
This signal can be input or output and is unmultiplexed
This signal can be input or output. In mobile, this GPIO
is not implemented and is used instead as CLKRUN#.
This signal is fixed as input only and can instead be
used for SATA[3]GP. This signal is used only as
GPI[31] in mobile.
This signal is fixed as input only and can instead be
used for SATA[2]GP.
This signal is fixed as input only and can instead be
used for SATA[1]GP. It is used only as GPI[29] in
mobile.
This signal can be input or output and is unmultiplexed.
This signal is fixed as input only and can instead be
used for SATA[0]GP.
This signal can be input or output and is unmultiplexed.
It is a strap for internal Vcc2_5 regulator. See
Section 2.22.1.
This signal can be input or output and is unmultiplexed.
This signal is fixed as output only.
This signal is not Implemented
This signal is fixed as output only and is unmultiplexed
This signal is fixed as output only. In mobile, this GPO
is not implemented and is used instead as STP_CPU#.
This signal is fixed as output only.
GPO[19]
O
3.3 V
Core
NOTE: GPO[19] may be programmed to blink
(controllable by GPO_BLINK (D31:F0:Offset
GPIOBASE+18h:bit 19)).
Intel^® I/O Controller Hub 6 (ICH6) Family Datasheet
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