Intel 6 SERIES CHIPSET - DATASHEET 01-2011 - General Purpose I;O Signals

Signal Description
80 Datasheet
2.24 General Purpose I/O Signals
Notes:
1. GPIO Configuration registers within the Core Well are reset whenever PWROK is
deasserted.
2. GPIO Configuration registers within the Suspend Well are reset when RSMRST# is
asserted, CF9h reset (06h or 0Eh), or SYS_RESET# is asserted. However, CF9h
reset and SYS_RESET# events can be masked from resetting the Suspend well
GPIO by programming appropriate GPIO Reset Select (GPIO_RST_SEL) registers.
3. GPIO24 is an exception to the other GPIO Signals in the Suspend Well and is not
reset by CF9h reset (06h or 0Eh)
Table 2-24. General Purpose I/O Signals (Sheet 1 of 4)
Name Type Tolerance
Power
Well
Default
Blink
Capability
Description
GPIO75 I/O 3.3 V Suspend Native No
Multiplexed with SML1DATA
(Note 11)
GPIO74 I/O 3.3 V Suspend Native No
Multiplexed with SML1ALERT#/
PCHHOT#
(Note 11)
GPIO73
(Mobile Only)
I/O 3.3 V Suspend Native No Multiplexed with PCIECLKRQ0#
GPIO72 I/O 3.3 V Suspend
Native
(Mobile
Only)
No
Mobile: Multiplexed with
BATLOW#.
Desktop: Unmultiplexed; requires
pull-up resistor. (Note 4)
GPIO[71:70] I/O 3.3 V Core Native No Mobile: Used as GPIO only
GPIO[69:68] I/O 3.3 V Core GPI No Mobile: Used as GPIO only
GPIO67 I/O 3.3 V Core Native No Multiplexed with CLKOUTFLEX3
GPIO66 I/O 3.3 V Core Native No Multiplexed with CLKOUTFLEX2
GPIO65 I/O 3.3 V Core Native No Multiplexed with CLKOUTFLEX1
GPIO64 I/O 3.3 V Core Native No Multiplexed with CLKOUTFLEX0
GPIO63 I/O 3.3 V Suspend Native No Multiplexed with SLP_S5#
GPIO62 I/O 3.3 V Suspend Native No Multiplexed with SUSCLK
GPIO61 I/O 3.3 V Suspend Native No Multiplexed with SUS_STAT#
GPIO60 I/O 3.3 V Suspend Native No Multiplexed with SML0ALERT#
GPIO59 I/O 3.3 V Suspend Native No
Multiplexed with OC0#
(Note 11)
GPIO58 I/O 3.3 V Suspend Native No Multiplexed with SML1CLK
GPIO57 I/O 3.3 V Suspend GPI No Unmultiplexed
GPIO56
(Mobile Only)
I/O 3.3 V Suspend Native No
Mobile: Multiplexed with
PEG_B_CLKRQ#
GPIO55 I/O 3.3 V Core Native No
Desktop: Multiplexed with GNT3#
Mobile: Used as GPIO only