Siemens SIMATIC Box PC 620, Manual

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Hardware Information
7-7
SIMATIC Box PC 620 Manual
A5E00131465-03
Interrupt assignment
Interrupt Description Remark
IRQ0 Timer output 0 cannot be disabled
IRQ1 Keyboard cannot be disabled
IRQ2 Cascaded (IRQ9) cannot be disabled
IRQ3 Serial port 2 2)
IRQ4 Serial port 1 2)
IRQ5 PCI, Plug and Play 1) 2) Default interrupt in PROFIBUS
IRQ6 FD controller cannot be disabled
IRQ7 Parallel port 1 2)
IRQ8 Real–time clock (RTC) cannot be disabled
IRQ9 PCI, Plug and Play (Redirected IRQ2) 1) 2) Default interrupt in VGA, Ethernet and
Raid Controller
IRQ10 PCI, Plug and Play 2)
IRQ11 PCI, Plug and Play 1)
IRQ12 PS-2 mouse 2)
IRQ13 Numeric processor cannot be disabled
IRQ14 HD controller 1 (primary) 2)
IRQ15 HD controller 2 (secondary) 2)
1) PCI cards and the on-board PCI devices require PCI interrupt lines. These interrupt lines are sharable
and plug and play capable. This means several devices can share one interrupt. The interrupt assign-
ment is done automatically. PCI interrupt lines must be derived from the ISA interrupt pool, this means
PCI modules also use ISA resources. This allocation is done automatically, too.
Plug and play incapable ISA cards can be allocated to a free interrupt by setting the ”PCI/PNP ISA
IRQ Resource Exclusion” of the corresponding interrupt to reserved in the BIOS setup menu. Refer to
the respective ISA module documentation for the respective interrupt to be allocated.
2) These functions can be disabled. The allocated resources become free as a result.
PCI interrupt lines assignment
PCI Interrupt Line Description Remark
1 unused exclusive Interrupt Slot 1
2 Cardbus 1)
3 Ethernet 1) 3
VGA cannot be disabled
4 USB 1.1 Controller A cannot be disabled 4
USB 1.1 Controller B cannot be disabled
PCI – MPI/DP 1)
1) These functions can be disabled. The allocated resources become free as a result.
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