AmITX-BE-G
Page 41
7.3.2.
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
Math Processor
N/A
Note (1)
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.
7.3.3.
IRQ Lines APIC mode
IRQ#
Typical Interupt Resource
0
High precision even timer/System timer
3 Serial
Port
2
4 Serial
Port
1
5 Serial
Port
3
6 Serial
Port
4
8
High precision even timer
13
Numeric data processor
14
ATA Channel 0
15
ATA Channel 1
16
High Definition Audio Controller
17
Standard Enhanced PCI to USB Host Controller
18
Standard OpenHCD USB Host Controller
19
AMD SATA Controller
27
High Definition Audio Controller