Datasheet

Datasheet, Volume 2 47
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Processor Integrated I/O (IIO) Configuration Registers
3.2.4 Standard PCI Configuration Space (Type 0/1 
Common Configuration Space)
This section covers registers in the 0h to 3Fh region that are common to all the devices
0–3. Comments at the top of the table indicate what devices/functions the description
applies to. Exceptions that apply to specific functions are noted in the individual bit
descriptions.
3.2.4.1 VID—Vendor Identification Register
3.2.4.2 DID—Device Identification Register
Register: VID
Bus: 0 Device: 0 Function: 0 Offset: 00h
Bus: 0 Device: 1 Function: 0–1 Offset: 00h
Bus: 0 Device: 2 Function: 0–3 Offset: 00h
Bus: 0 Device: 3 Function: 0–3 Offset: 00h
Bit Attr
Reset
Value
Description
15:0 RO 8086h Vendor Identification Number
The value is assigned by PCI-SIG to Intel.
DID
Bus: 0 Device: 0 Function: 0 Offset: 00h
Bus: 0 Device: 1 Function: 0–1 Offset: 00h
Bus: 0 Device: 2 Function: 0–3 Offset: 00h
Bus: 0 Device: 3 Function: 0–3 Offset: 00h
Bit Attr
Reset
Value
Description
15:0 RO
Device Identification Number
Device IDs for PCI Express root ports are as follows:
3C00h = Device 0 in DMI mode
3C02h = Port 1a
3C03h = Port 1b
3C04h = Port 2a
3C05h = Port 2b
3C06h = Port 2c
3C07h = Port 2d
3C08h = Port 3a in PCIe mode
3C09h = Port 3b
3C0Ah = Port 3c
3C0Bh = Port 3d
The value is assigned by Intel to each product.