Functional Architecture
Intel® Server Board SE7520AF2 TPS
80
Revision
1.2
Intel order number C77866-003
configuration cycles. The following table shows the correspondence between IDSEL values and
PCI device numbers for the PCI bus. The lower 5-bits of the device number are used in
CONFIG_ADDRESS bits [15::11].
Table 28. PCI Configuration IDs and Device Numbers
PCI Device
IDSEL
Bus # / Device # / Function #
MCH host-HI bridge/DRAM controller
00 / 00 / 0,1
MCH EXP Bridge A0
00 / 02 / 00
MCH EXP Bridge A1
00 / 03 / 00
MCH EXP Bridge B0
00 / 04 / 00
MCH EXP Bridge B1
00 / 05 / 00
MCH EXP Bridge C0
00 / 06 / 00
MCH EXP Bridge C1
00 / 07 / 00
ICH5R Hub interface to PCI bridge
00 / 30 / 00
ICH5R PCI to LPC interface
00 / 31 / 00
ICH5R IDE controller
00 / 31 / 01
ICH5R Serial ATA
00 / 31 / 02
ICH5R SMBus controller
00 / 31 / 03
ICH5R USB UHCI controller 1
00 / 29 / 00
ICH5R USB UHCI controller 2
00 / 29 / 01
ICH5R USB UHCI controller 3
00 / 29 / 02
ICH5R USB 2.0 EHCI controller
00 / 29 / 07
Slot 1 (PCI-X 64/133)
AD21
01 / 01 /
Slot 3 (PCI EXP x4)
01 / 04 /
Slot 4 (PCI EXP x8)
02 / 06 /
Slot 5 (PCI-X 64/133)
AD17
00 / 01 /
Slot 6 (PCI-X 64/100)
AD17
01/ 01 /
Slot 6 (Upper Slot of optional 2-slot riser)
AD17
01/ 01 /
Slot 7 (Lower Slot of optional 2-slot riser)
AD18
01 / 02 /
Intel 82546GB Dual Gb NIC
P1B_AD20
/ 04 / 0,1
LSI Logic* 53C1030 Ultra 320 SCSI w/ dual
channel
P1A_AD21
/ 05 / 0,1
ATI Rage XL (PCI VGA)
PC_AD28
/ 12 / 0
3.5.4 Hardware
Initialization
A system based on the “Nocona” / “Irwindale” processor and the lntel® E7520 chipset is
initialized the following manner.
System power is applied. The power-supply provides resets using the PS_GOOD_H signal. The
ICH5-R asserts PCI_RST_L to reset the MCH and the PXH. The MCH asserts CPURST_L to
reset the processor(s).
The “Nocona” / “Irwindale” processor is initialized, with its internal registers set to default values.
Before CPURST_L is de-asserted, the processor asserts BREQ0_L. Processor(s) in the system