Intel DG965WH Product Specification - Page 50

Connectors and Headers

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Intel Desktop Board DG965WH Technical Product Specification Table 17. PCI Interrupt Routing Map ICH8 PIRQ Signal Name PCI Interrupt Source ICH8 LAN PIRQA PIRQB PIRQC PIRQD PIRQE PIRQF PIRQG PIRQH INTA PCI bus connector 1 INTD INTA INTB INTC PCI bus connector 2 INTC INTB INTA INTD PCI bus connector 3 INTD INTC INTA INTB IEEE-1394a controller INTA NOTE In PIC mode, the ICH8 can connect each PIRQ line internally to one of the IRQ signals (3, 4, 5, 6, 7, 9, 10, 11, 12, 14, and 15). Typically, a device that does not share a PIRQ line will have a unique interrupt. However, in certain interrupt-constrained situations, it is possible for two or more of the PIRQ lines to be connected to the same IRQ signal. Refer to Table 15 for the allocation of PIRQ lines to IRQ signals in APIC mode. PCI interrupt assignments to USB ports and Serial ATA ports are dynamic. 2.8 Connectors and Headers CAUTION Only the following connectors have overcurrent protection: Back panel and front panel USB, PS/2, and VGA. The other internal connectors/headers are not overcurrent protected and should connect only to devices inside the computer's chassis, such as fans and internal peripherals. Do not use these connectors/headers to power devices external to the computer's chassis. A fault in the load presented by the external devices could cause damage to the computer, the power cable, and the external devices themselves. This section describes the board's connectors and headers. The connectors and headers can be divided into these groups: • Back panel I/O connectors (see page 51) • Component-side connectors and headers (see page 52) 50

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Intel Desktop Board DG965WH Technical Product Specification
50
Table 17. PCI Interrupt Routing Map
ICH8 PIRQ Signal Name
PCI Interrupt Source
PIRQA
PIRQB
PIRQC
PIRQD
PIRQE
PIRQF
PIRQG
PIRQH
ICH8 LAN
INTA
PCI bus connector 1
INTD
INTA
INTB
INTC
PCI bus connector 2
INTC
INTB
INTA
INTD
PCI bus connector 3
INTD
INTC
INTA
INTB
IEEE-1394a controller
INTA
±
NOTE
In PIC mode, the ICH8 can connect each PIRQ line internally to one of the IRQ signals
(3, 4, 5, 6, 7, 9, 10, 11, 12, 14, and 15). Typically, a device that does not share a
PIRQ line will have a unique interrupt.
However, in certain interrupt-constrained
situations, it is possible for two or more of the PIRQ lines to be connected to the same
IRQ signal.
Refer to Table 15 for the allocation of PIRQ lines to IRQ signals in APIC
mode.
PCI interrupt assignments to USB ports and Serial ATA ports are dynamic.
2.8
Connectors and Headers
CAUTION
Only the following connectors have overcurrent protection:
Back panel and front panel
USB, PS/2, and VGA.
The other internal connectors/headers are not overcurrent protected and should
connect only to devices inside the computer’s chassis, such as fans and internal
peripherals.
Do not use these connectors/headers to power devices external to the
computer’s chassis.
A fault in the load presented by the external devices could cause
damage to the computer, the power cable, and the external devices themselves.
This section describes the board’s connectors and headers.
The connectors and
headers can be divided into these groups:
•
Back panel I/O connectors (see page 51)
•
Component-side connectors and headers (see page 52)