4 interrupt request (irq) lines, Interrupt request (irq) lines – ADLINK cExpress-BL User Manual
Page 43
cExpress-BL
Page 43
6.4 Interrupt Request (IRQ) Lines
PIC Mode
IRQ#
Typical Intterupt Resource
Connected to Pin
Available
0 Counter
0
N/A
No
1 Keyboard
controller
N/A
No
2
Cascade interrupt from slave PIC
N/A
No
3
Serial Port 2 (COM2)
IRQ3 via SERIRQ / PIRQ
Note (1)
4
Serial Port 1 (COM1)
IRQ4 via SERIRQ / PIRQ
Note (1)
5
Parallel Port 2 (LPT2)
IRQ5 via SERIRQ / PIRQ
Note (1)
6
Generic
IRQ6 via SERIRQ / PIRQ
No
7
Generic
IRQ7 via SERIRQ / PIRQ
Note (1)
8 Real-time
clock
N/A
No
9 Generic
N/A
Note
(1)
10
Serial Port 3 (COM3)
IRQ10 via SERIRQ / PIRQ
Note (1)
11
Serial Port 4 (COM4)
IRQ11 via SERIRQ / PIRQ
Note (1)
12
PS/2 Mouse
IRQ12 via SERIRQ / PIRQ
Note (1)
13
GSPI, UART, I2C, SDIO
N/A
Note (1)
14 gpio
PIRQ
Note
(1)
15 gpio
PIRQ
Note
(1)
Note (1): These IRQs can be used for PCI devices when onboard device is disabled.
APIC Mode
IRQ#
Typical Intterupt Resource
Connected to Pin
Available
0 Counter
0
N/A
No
1 Keyboard
controller
N/A
No
2
Cascade interrupt from slave PIC
N/A
No
3
Serial Port 2 (COM2)
IRQ3 via SERIRQ / PIRQ
Note (1)
4
Serial Port 1 (COM1
IRQ4 via SERIRQ / PIRQ
Note (1)
5 N/A
N/A
Note
(1)
6 N/A
N/A
Note
(1)
7 N/A
N/A
Note
(1)
8 Real-time
clock
N/A
No
9
N/A
IRQ9 via SERIRQ / PIRQ
Note (1)
10
Serial Port 3 (COM3)
IRQ10 via SERIRQ / PIRQ
Note (1)