Table 10. Pxh P64-A Configuration Ids; Table 11. Pxh P64-B Configuration Ids - Intel SE7520AF2 Technical Product Specification

Intel® Server Board SE7520AF2 TPS
The second PCI-X segment, P64-B, supports the interface to the on-board Intel® 82546GB
10/100/1000 Dual Gigabit Ethernet controller and the PCI expansion Slot 6 (PCI-X 64/100) or
Slot 6 and Slot 7 for a two-slot riser.
3.4.1.2.1 PCI Riser Support
PCI Slot 6 enables support for third-party add-in riser cards. The slot can be populated with
three types of devices:
Standard PCI-X 1.0 compatible riser card
1U/1-slot PCI-X riser card
2U/2-slot PCI-X riser card
Note: Intel does not provide a PCI riser card for this server platform. However, in this document,
Intel has provided information to assist developers with their PCI riser design.
3.4.1.2.2 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 PXH P64-A/P64-B devices and corresponding device
description.
IDSEL Value
17
19
18
20
3.4.1.2.3 PXH P64-A Arbitration
The PXH P64-A bus segment supports only the PCI expansion Slot 5 (PCI-X 64/133), which
must arbitrate for PCI access using resources supplied by the PXH. The host bridge PCI
interface arbitration lines PAREQx* and PAGNTx* are a special case in that they are internal to
the host bridge. The following table defines the arbitration connections.
Revision 1.2

Table 10. PXH P64-A Configuration IDs

IDSEL Value
17 Slot 5 (PCI-X 64/133)

Table 11. PXH P64-B Configuration IDs

Slot 6 (PCI-X 64/100)
Slot 6 (Upper slot of optional 2-slot riser)
Slot 7 (Lower slot of optional 2-slot riser)
Intel® 10/100/1000 82546GB Dual Gigabit Ethernet controller
Intel order number C77866-003
Device
Device
Functional Architecture
53