Interrupt Request (Irq) Lines - ADLINK Technology COM Express cExpress-BL User Manual

6.4.

Interrupt Request (IRQ) Lines

PIC Mode
IRQ# Typical Intterupt Resource
0 Counter 0
1 Keyboard controller
2 Cascade interrupt from slave PIC
3 Serial Port 2 (COM2)
4 Serial Port 1 (COM1)
5 Parallel Port 2 (LPT2)
6 Generic
7 Generic
8 Real-time clock
9 Generic
10 Serial Port 3 (COM3)
11 Serial Port 4 (COM4)
12 PS/2 Mouse
13 GSPI, UART, I2C, SDIO
14 gpio
15 gpio
Note (1): These IRQs can be used for PCI devices when onboard device is disabled.
APIC Mode
IRQ# Typical Intterupt Resource
0 Counter 0
1 Keyboard controller
2 Cascade interrupt from slave PIC
3 Serial Port 2 (COM2)
4 Serial Port 1 (COM1
5 N/A
6 N/A
7 N/A
8 Real-time clock
9 N/A
10 Serial Port 3 (COM3)
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Connected to Pin
N/A
N/A
N/A
IRQ3 via SERIRQ / PIRQ
IRQ4 via SERIRQ / PIRQ
IRQ5 via SERIRQ / PIRQ
IRQ6 via SERIRQ / PIRQ
IRQ7 via SERIRQ / PIRQ
N/A
N/A
IRQ10 via SERIRQ / PIRQ
IRQ11 via SERIRQ / PIRQ
IRQ12 via SERIRQ / PIRQ
N/A
PIRQ
PIRQ
Connected to Pin
N/A
N/A
N/A
IRQ3 via SERIRQ / PIRQ
IRQ4 via SERIRQ / PIRQ
N/A
N/A
N/A
N/A
IRQ9 via SERIRQ / PIRQ
IRQ10 via SERIRQ / PIRQ
Available
No
No
No
Note (1)
Note (1)
Note (1)
No
Note (1)
No
Note (1)
Note (1)
Note (1)
Note (1)
Note (1)
Note (1)
Note (1)
Available
No
No
No
Note (1)
Note (1)
Note (1)
Note (1)
Note (1)
No
Note (1)
Note (1)