BLKD815EPFVU Intel, BLKD815EPFVU Datasheet - Page 62

• Manufacturer Part Number: BLKD815EPFVU
• Manufacturer: Intel

Specifications of BLKD815EPFVU

• Lead Free Status / Rohs Status: Supplier Unconfirmed

Intel Desktop Board D815EFV/D815EPFV Technical Product Specification
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The ICH2 has eight programmable interrupt request (PIRQ) input signals. All PCI interrupt
sources either onboard or from a PCI add-in card connect to one of these PIRQ signals. Some PCI
interrupt sources are electrically tied together on the D815EFV and D815EPFV boards and
therefore share the same interrupt. Table 18 shows an example of how the PIRQ signals are routed
on the D815EFV and D815EPFV boards.
For example, using Table 18 as a reference, assume that an add-in card using INTA is plugged into
PCI bus connector 3. In PCI bus connector 3, INTA is connected to PIRQH, which is already
connected to the ICH2 USB controller #2. The add-in card in PCI bus connector 3 now shares
interrupts with these onboard interrupt sources.
Table 18.
NOTE
The ICH2 can connect each PIRQ line internally to one of the IRQ signals (3, 4, 5, 6, 7, 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.
GMCH/AGP
ICH2 USB controller #1
SMBus controller
ICH2 USB controller #2
ICH2 audio/modem
ICH2 LAN
PCI bus connector 1 (J7B1)
PCI bus connector 2 (J8B2)
PCI bus connector 3 (J9B2)
PCI Interrupt Source
PCI Interrupt Routing Map
PIRQF
INTA
INTD
INTC
PIRQG
INTB
INTA
INTD
ICH PIRQ Signal Name
PIRQH
INTC
INTC
INTB
INTA
PIRQB
INTB
INTB
INTB
INTD
INTC
INTB
Other
INTA to PIRQA
INTD to PIRQD
INTA to PIRQE