Table 8. Ich5-R P32-A Configuration Ids; Table 9. Ich5-R P32-A Arbitration Connections - Intel SE7520AF2 Technical Product Specification

Functional Architecture
ICH5-R P32-A
PXH P64-A
PXH P64-B
IOP332 P64-A
IOP332 P64-B
MCH PExp-B
MCH PExp-C
3.4.1.1 ICH5-R P32-A: 32-bit, 33-MHz PCI Subsystem
The 32-bit, 33-MHz PCI segment enabled by the ICH5-R is known as the ICH5-R P32-A
segment. This segment supports the on-board 2D/3D Graphics ATI* Rage XL video controller.
3.4.1.1.1 Device IDs (IDSEL)
The 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 the 32-bit on-board device.
3.4.1.1.2 ICH5-R P32-A Arbitration
The ICH5-R P32-A segment only supports the ATI Rage XL video controller which must
arbitrate for PCI access, using resources supplied by the ICH5-R. The host bridge PCI interface
(ICH5-R) 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.
3.4.1.2 PXH P64-A and P64-B: 64-bit, 100/133-MHz PCI Subsystem
The two peer 64-bit PCI-X bus segments are directed through the PXH PCI Bridge. The first
PCI-X segment, P64-A, supports the interface for the PCI expansion Slot 5 (PCI-X 64/133).
52
5 V 32-bits 33 MHz
3.3 V 64-bits 133 MHz
3.3 V 64-bits 100 MHz
3.3 V 64-bits 133 MHz
3.3 V 64-bits 133 MHz
Diff. Serial 2.5GHz
Diff. Serial 2.5GHz

Table 8. ICH5-R P32-A Configuration IDs

IDSEL Value
28 ATI* Rage XL video controller

Table 9. ICH5-R P32-A Arbitration Connections

Baseboard Signals
PCI_REQ0*/PCI_GNT0*
Intel order number C77866-003
Intel® Server Board SE7520AF2 TPS
PCI ATI* Rage XL
PCI-X Slot 5 (PCI-X 64/133)
Slot 6 (PCI-X 64/100)
PCI-X
Intel® 82546GB Dual Gb NIC
LSI Logic* 53C1030 U320 SCSI
PCI-X
controller
PCI-X Slot 1 (PCI-X 64/133)
PCI Exp Slot 4 (PCI Exp x8)
PCI Exp Slot 3 (PCI Exp x4)
Device
Device
ATI* Rage XL video controller
Revision 1.2