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Signal Definitions
(Continued)
PWRBTN#
AF15
I
Power Button.
An input used by the power management
logic to monitor external system events, most typically a
system on/off button or switch.
This signal has an internal pull-up of 100 K
, a Schmitt-
trigger input buffer and debounce protection of at least 16
ms.
Asserting POR# has no effect on ACPI. If POR# is
asserted and ACPI was active prior to POR#, then ACPI
will remain active after POR#. Therefore, BIOS must
ensure that ACPI is inactive before GPIO63 is pulsed
low.
Note:
This signal can be pulled down internally by soft-
ware control. This is done by enabling internal
GPIO63 to be an output, for at least 16 ms
(F0BAR0+I/O Offset 20h and 24h).
---
PWRCNT1
AE17
O
Suspend Power Plane Control 1 and 2.
Control signals
asserted during power management Suspend states.
These signals are open-drain outputs.
---
PWRCNT2
AF18
O
---
THRM#
AE15
I
Thermal Event.
An active low signal generated by exter-
nal hardware indicating that the system temperature is
too high.
---
2.4.12 GPIO Interface Signals
Name
Ball No.
Type
Description
Mux
GPIO0
B22
I/O
GPIO Port 0.
Each signal is configured
independently as an input or I/O, with
or without static pull-up, and with either
open-drain or totem-pole output type.
A debouncer and an interrupt can be
enabled or masked for each of signals
GPIO[0:3] and GPIO[6:15] indepen-
dently.
TRDE#
GPIO1
AD24
FPCICLK
GPIO2
B21
F5BAR4CS#
GPIO3
A22
F5BAR5CS#
GPIO6
AD12
DTR#/BOUTIDE_IOR1#+INTR_O
GPIO7
AF11
RTS#+IDE_DACK1#+F_C/BE3#
GPIO8
AC12
CTS#+IDE_DREQ1+SMI_O
GPIO9
AE12
DCD#+IDE_IOW1#+F_IRDY#
GPIO10
AF12
DSR#+IDE_IORDY1+F_FRAME#
GPIO11
AF19
RI#+IRQ15
GPIO12
AE23
AB2C+F_AD3
GPIO13
AD23
AB2D+F_AD4
GPIO14
D22
IOCS1#+IOR#+DOCR#
GPIO15
C22
IOW#+DOCW#
GPIO16
AE18
PC_BEEP+IRRX1+F_DEVSEL#
GPIO17
B23
IOCS0#+IOCHRDY
GPIO18
AC24
F_AD0
GPIO19
Y24
INTC#
GPIO20
D21
DOCCS#
2.4.11 Power Management Interface Signals (Continued)
Signal Name
Ball No.
Type
Description
Mux