Intel® Server Board SE7520JR2

Functional Architecture

3.4.3.5IRQ Scan for PCIIRQ

The IRQ / data frame structure includes the ability to handle up to 32 sampling channels with the standard implementation using the minimum 17 sampling channels. The Server Board SE7520JR2 has an external PCI interrupt serializer for PCIIRQ scan mechanism of ICH5-R to support 16 PCIIRQs.

IRQ0

IRQ1

IRQ2

IRQ3

IRQ4

IRQ5

IRQ6

IRQ7

IRQ8

IRQ9

IRQ10

IRQ11

IRQ12

IRQ13

IRQ14

IRQ15

IRQ16

IRQ17

IRQ0

IRQ1

IRQ2

IRQ3

IRQ4

IRQ5

IRQ6

IRQ7

IRQ8

IRQ9

IRQ10

IRQ11

IRQ12

IRQ13

IRQ14

IRQ15

IRQ16

IRQ17

IRQ0

IRQ1

IRQ2

IRQ3

IRQ4

IRQ5

IRQ6

IRQ7

IRQ8

IRQ9

IRQ10

IRQ11

IRQ12

IRQ13

IRQ14

IRQ15

IRQ16

IRQ17

ICH5-R

PXH IOAPIC 1

PXH IOAPIC 2

ICH5-R

HI1.5

INTERFACE

ICH5-R 8259PIC

PCI-E INTERFACE

 

 

 

 

 

 

INTR

 

 

 

 

 

 

 

 

 

 

 

CPU1

 

 

MCH

 

 

 

 

 

 

 

 

 

 

PCI-E INTERFACE

HI 1.5

 

 

 

 

INTR

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CPU2

 

 

 

 

 

 

 

 

Figure 8. Interrupt Routing Diagram (ICH5-R Internal)

Revision 1.0

55

 

C78844-002