SC1100 Datasheet, PDF (45/348 Pages) National Semiconductor (TI) – Geode™ Information Appliance On a Chip

Signal Definitions (Continued)
2.4.11 Power Management Interface Signals (Continued)
Signal Name
Ball No. Type Description
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 KΩ, 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
PWRCNT2
THRM#
AE17
AF18
AE15
O
Suspend Power Plane Control 1 and 2. Control signals
O
asserted during power management Suspend states.
These signals are open-drain outputs.
I
Thermal Event. An active low signal generated by exter-
nal hardware indicating that the system temperature is
too high.
Mux
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2.4.12 GPIO Interface Signals
Name
Ball No. Type
GPIO0
GPIO1
GPIO2
GPIO3
GPIO6
GPIO7
GPIO8
GPIO9
GPIO10
GPIO11
GPIO12
GPIO13
GPIO14
GPIO15
GPIO16
GPIO17
GPIO18
GPIO19
GPIO20
B22
I/O
AD24
B21
A22
AD12
AF11
AC12
AE12
AF12
AF19
AE23
AD23
D22
C22
AE18
B23
AC24
Y24
D21
Description
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.
Mux
TRDE#
FPCICLK
F5BAR4CS#
F5BAR5CS#
DTR#/BOUTIDE_IOR1#+INTR_O
RTS#+IDE_DACK1#+F_C/BE3#
CTS#+IDE_DREQ1+SMI_O
DCD#+IDE_IOW1#+F_IRDY#
DSR#+IDE_IORDY1+F_FRAME#
RI#+IRQ15
AB2C+F_AD3
AB2D+F_AD4
IOCS1#+IOR#+DOCR#
IOW#+DOCW#
PC_BEEP+IRRX1+F_DEVSEL#
IOCS0#+IOCHRDY
F_AD0
INTC#
DOCCS#
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