P32-B 66-Mhz Pci-X Subsystem (Se7221Bk1Lx Sku Only); Table 6. P32-A Configuration Ids; Table 7. P32-A Arbitration Connections; Table 8. P32-B Configuration Ids - Intel SE7221BK1-E Technical Product Specification

SE7221BK1-E Technical Product Specification
unique PCI device ID value for use in configuration cycles. The following table shows the bit to
which each IDSEL signal is attached for P32-A devices and the corresponding device
description.
IDSEL Value
19
18
5.1.1.2 P32-A Arbitration
P32-A supports two PCI devices: the ICH6R and one PCI bus masters (NIC). All PCI masters
must arbitrate for PCI access, using resources supplied by the ICH6R. The host bridge PCI
interface (ICH6R) arbitration lines REQx* and GNTx* are a special case in that they are internal
to the host bridge. The following table defines the arbitration connections.
Baseboard Signals
PCI REQ1_N/GNT_N1
PCI REQ0_N/GNT_N0
5.1.2

P32-B 66-MHz PCI-X Subsystem (SE7221BK1LX sku only)

One 32-bit PCI bus segment is directed through the PXH interface A. This PCI segment, P32-B,
just has an embedded device, Intel® 82541PI LAN (NIC2) clocked at 66MHz. (SE7221BK1LX
sku only)
5.1.2.1 Device IDs (IDSEL)
Each device under the PCI hub bridge has its IDSEL signal connected to one bit of AD [31:16],
which acts as a chip select on the PCI bus segment in configuration cycles. This determines a
unique PCI device ID value for use in configuration cycles. The following table shows the bit to
which each IDSEL signal is attached for P32-B devices and corresponding device description.
IDSEL Value
19
5.1.2.2 P32-B Arbitration
P32-B supports one PCI masters. All PCI masters must arbitrate for PCI access using
resources supplied by the PXH. The host bridge PCI interface (PXH) arbitration lines REQx*

Table 6. P32-A Configuration IDs

Device
Intel® 82541PI LAN (NIC1)
PCI Slot 1 (32b/33MHz)

Table 7. P32-A Arbitration Connections

Device
Intel® 82541PI LAN (NIC1)
PCI Slot 1 (32bit/33MHz)

Table 8. P32-B Configuration IDs

Device
Intel® 82541PI LAN (NIC2)
15