Intel
®
E7520 Memory Controller Hub (MCH) Datasheet 125
Register Descriptions
Table 3-7. PCI Express Port A PCI Configuration Register Map (D2:F0) (Sheet 1 of 3)
Address
Offset
Mnemonic Register Name Access Default
00 – 01h VID Vendor Identification RO 8086h
02 – 03h DID Device Identification RO 3595h
04 – 05h PCICMD PCI Command Register RO, R/W 0000h
06 – 07h PCISTS PCI Status Register RO, R/WC 0010h
08h RID Revision Identification RO 09h
0Ah SUBC Sub-Class Code RO 04h
0Bh BCC Base Class Code RO 06h
0Ch CLS Cache Line Size R/W 00h
0Eh HDR Header Type RO 01h
18h PBUSN Primary Bus Number RO 00h
19h SBUSN Secondary Bus Number R/W 00h
1Ah SUBUSN Subordinate Bus Number R/W 00h
1Ch IOBASE I/O Base Address Register R/W, RO F0h
1Dh IOLIMIT I/O Limit Address Register R/W 00h
1E – 1Fh SEC_STS Secondary Status Register R/WC, RO 0000h
20 – 21h MBASE Memory Base Address Register R/W FFF0h
22 – 23h MLIMIT Memory Limit Address Register R/W 0000h
24 – 25h PMBASE Prefetchable Memory Base Address
Register
R/W, RO FFF1h
26 – 27h PMLIMIT Prefetchable Memory Limit Address Reg. R/W, RO 0001h
28h PMBASU Prefetchable Mem Base Upper Addr.
Reg.
RO, R/W 0Fh
2Ch PMLMTU Prefetchable Memory Limit Upper
Address Register
RO, R/W 00h
34h CAPPTR Capabilities Pointer RO 50h
3Ch INTRLINE Interrupt Line Register R/W 00h
3Dh INTRPIN Interrupt Pin Register R/WO 01h
3Eh BCTRL Bridge Control Register RO, R/W 00h
44h VS_CMD0 Vendor-Specific Command Register 0 RO 00h
45h VS_CMD1 Vendor-Specific Command Register 1 RO, R/W,
R/WS
00h
46h VS_STS0 Vendor-Specific Status Register 0 RO 00h
47h VS_STS1 Vendor-Specific Status Register 1 RO, R/WC 00h
50h PMCAPID Power Management Capabilities
Structure
RO 01h
51h PMNPTR Power Management Next Capabilities
Pointer
RO 58h
52 – 53h PMCAPA Power Management Capabilities RO C822h
54 – 55h PMCSR Power Management Status and Control RO,R/W 0000h
56h PMCSRBSE Power Management Status and Control
Bridge Extensions
RO 00h
57h PMDATA Power Management Data RO 00h
58h MSICAPID MSI Capabilities Structure RO 05h
59h MSINPTR MSI Next Capabilities Pointer RO 64h
5A – 5Bh MSICAPA MSI Capabilities RO, R/W 0002h
