IBASE Technology IB990 - Interrupt Request Lines (IRQ)

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Appendix

IB990 User’s Manual

B. Interrupt Request Lines (IRQ)

Peripheral devices use interrupt request lines to notify CPU for the

service required. The following table shows the IRQ used by the

devices on board.

Level

Function

IRQ0

System Timer

IRQ3

Serial Port #2

IRQ4

Serial Port #1

IRQ5

Serial Port #3

IRQ7

Serial Port #4

IRQ8

Real Time Clock

IRQ 11

Intel(R) 100 Series/C230 Series Chipset Family

Integrated Sensor Hub - A135

IRQ 11

Intel(R) 100 Series/C230 Series Chipset SMBus

- A123

IRQ 11

Intel(R) 100 Series/C230 Series Chipset

Thermal subsystem - A131

IRQ 13

Numeric data processor

IRQ 16

High Definition Audio Controller

IRQ 16

Standard SATA AHCI Controller

IRQ 19

Intel(R) Active Management Technology - SOL

(COM5)