IEI Integration ICE-DB-9S - Manual (Page 96)

Page 83
ICE Module
systems
A34 BIOS_DISABLE# I CMOS Module BIOS disable input. Pull low to disable module
BIOS. Used to allow off-module BIOS implementations.
B27 WDT O CMOS Output indicating that a watchdog time-out event has
occurred.
A86 KBD_RST# I CMOS Input to module from (optional) external keyboard
controller that can force a reset. Pulled high on the module.
This is a legacy artifact of the PC-AT.
A87 KBD_A20GATE I CMOS Input to module from (optional) external keyboard
controller that can be used to control the CPU A20 gate
line. The A20GATE restricts the memory access to the
bottom megabyte and is a legacy artifact of the PC-AT.
Pulled low on the module.
GPO[0:3] OI CMOS General purpose output pins. Upon a hardware reset,
these outputs should be low.
GPI[0:3] I CMOS General purpose input pins. Pulled high internally on the
module.
TYPE[0:2]# TBD The TYPE pins indicate to the Carrier Board the Pin-out
Type that is implemented on the module. The pins are tied
on the module to either ground (GND) or are no-connects
(NC). For Pin-out Type 1, these pins are don’t care (X).
TYPE2# TYPE1# TYPE0#
X X X Pin-out Type 1
NC NC NC Pin-out Type 2
NC NC GND Pin-out Type 3 (no IDE)
NC GND NC Pin-out Type 4 (no PCI)
NC GND GND Pin-out Type 5 (no IDE, no
PCI)
The Carrier Board should implement combinatorial logic
that monitors the module TYPE pins and keeps power off
(e.g deactivates the ATX_ON signal for an ATX power
supply) if an incompatible module pin-out type is detected.
The Carrier Board logic may also implement a fault
indicator such as an LED.
PS: In IEI carrier board, these pins are for future use.