Siemens SIMATIC Series Operating Instructions Manual page 163

Slot-specific interrupt assignment
Interrupt routing of the slot connectors on the motherboard.
Interrupt assignment of the slot connectors
Note
All system resources (hardware addresses, memory utilization, interrupt assignment, DMA
channels) are assigned dynamically by the BIOS or the Windows operating system,
depending on the hardware equipment, drivers, inserted expansion cards and connected
external devices.
Assignment is automatic and depends on the demanded resources of the connected devices
and the inserted expansion cards. Due to this configuration dependency, clear statements
can only be made by determining them with the system in the final configuration. The
following tables are an example of the assignment if the device is operated in PIC mode
(legacy boot media).
Slot Type
1 PCIe CPU *
2 PCIe PCH *
3 PCIe PCH *
4 PCIe PCH *
5 PCIe PCH *
6 PCI 1
7 PCI 2
* For version of direct plug connector socket and number of active PCIe lanes of the slot, see "Motherboard" in the "Tech-
nical specifications" section
The table applies to the configuration with an expansion card which uses only an interrupt,
e.g. PCI expansion cards which use the interrupt INTA#, connected to pin A6 of PCI bus
connector.
Exclusive PCI hardware interrupt
Applications demanding a high-performance interrupt require a high-speed hardware
interrupt reaction. The PCI hardware interrupt should be used only by one resource in order
to ensure high-speed reaction of the hardware.
Setting up an exclusive interrupt on the device (APIC mode only)
An exclusive interrupt can be used for PCI 1 slot 6 IRQ (APIC mode) 31 and PCI 2 slot 7
IRQ (APIC mode) 48. Further exclusive interrupts for use at the slots are not available.
SIMATIC IPC547G
Operating Instructions, 04/2020, A5E49948632-AA
Technical specifications
8.5 Hardware description
IRQ-PIC mode
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