User Guide

Software Functional Overview
3-10 FIC MD02 Service Manual
IRQ Map
IRQ# Description
IRQ 0 System Timer
IRQ 1 Keyboard
IRQ 2
IRQ 3
IRQ 4
IRQ 5 Audio/VGA/USB
IRQ 6 Floppy Disk Drive
IRQ 7
IRQ 8 RTC Alarm
IRQ 9 ACPI
IRQ10 LAN / Modem or Combo, (Card Bus), IEEE 1394
IRQ11 Reserved for PCMCIA card
IRQ12 Glide Pad
IRQ13 FPU (FERR)
IRQ14 Hard Disk Drive
IRQ15 CD-ROM or DVD-ROM
3.3.13 GPIO Pin Assignment
The GPI and GPO pins connected to system devices. The BIOS can get device’s
status and control the device via the GPI and GPO pins.
ICH4 GPI pin assignment
GPIO
Number
Signal Name Default I/O Notes
GPIO0 PanelID0 I Panel ID setting
GPIO1 PanelID1 I Panel ID setting
GPIO2 PanelID2 I Panel ID setting
GPIO3 PanelID3 I Panel ID setting
GPIO8 Q_SMI0 I 0:External K/B SMI0
1:Normal operation
GPIO11 LPC_QPME0 1 O 0:LPC_QPME0 Event Enable
1:Normal operation --
GPIO12 EC_SCI0 I 0:PMU SCI Detect
1:PMU SCI not Detect
GPIO13 PM_RI0 I 0:PMU GPIO detect
1:PMU GPIO not Detect
GPIO25 CB_HWSUSP
0
1 O R5C551 Hardware suspend
control pin
GPIO32 SPDMUX0 1 O SMBus select 1
GPIO33 SPDMUX1 1 0 SMBus select 0
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