Exclusive Pci Hardware Interrupt - Siemens SIMATIC IPC627E Operating Instructions Manual

Hardware description
A.5 System resources
A.5.4

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.
Exclusive interrupt on the device (APIC mode)
Ethernet 1
Ethernet 2
Profibus/MPI
PCI slot 1
PCI slot 2
PCI Express slot
Requirement: The modules in the PCI slots each require only one interrupt
1)
Requirement: VGA and PCIexpress do not require an interrupt
2)
Requirement: VGA does not require an interrupt and Ethernet1 is disabled
3)
Assigning exclusive interrupts in the firmware (PIC mode)
The interrupts are automatically assigned to the slots at system startup due to the default
settings in system BIOS.
Several slots may share the same interrupt, depending on the system configuration. This
functionality is known as interrupt sharing. Exclusive interrupts are not available in PIC
mode. Disable specific system resources in order to obtain exclusive interrupts. BIOS
assigns the PIC interrupts at random during restart of the system.
148
IRQ assignments for Windows systems, (APIC mode)
16
1, 2
17
1
19
1
20
1
21
1
16
1, 3
Operating Instructions, 12/2018, A5E44297201-AA
SIMATIC IPC627E