Interrupt request (irq) lines, Pic mode – ADLINK cExpress-BT User Manual
Page 42
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Page 42
cExpress-BT
6.3. Interrupt Request (IRQ) Lines
6.3.1. PIC Mode
IRQ#
Typical Intterupt Resource
Connected to Pin
Available
0 Counter
0
N/A
No
1
Keyboard controller
IRQ1 via SERIRQ / PIRQ
No
2
Cascade interrupt from slave PIC
N/A
No
3
Generic
IRQ3 via SERIRQ / PIRQ
4
PCU Serial Port (COM1)
IRQ4 via SERIRQ / PIRQ
Note (1)
5
Generic
IRQ5 via SERIRQ / PIRQ
6
Generic
IRQ6 via SERIRQ / PIRQ
Note (1)
7
Generic
IRQ7 via SERIRQ / PIRQ
Note (1)
8 Real-time
clock
N/A
No
9
Generic
IRQ9 via SERIRQ / PIRQ
Note (1)
10
Generic
IRQ10 via SERIRQ / PIRQ
Note (1)
11
Generic
IRQ11 via SERIRQ / PIRQ
Note (1)
12
Generic
IRQ12 via SERIRQ / PIRQ
Note (1)
13 Math
Processor
N/A
No
14
Primary IDE controller
IRQ14 via SERIRQ / PIRQ
Note (1)
15
Secondary IDE controller
IRQ15 via SERIRQ / PIRQ
Note (1)
Note (1): These IRQs can be used for PCI devices when onboard device is disabled.