82801DB Datasheet, PDF (418/587 Pages) Intel Corporation – Intel 82801DB I/O Controller Hub 4 (ICH4)

EHCI Controller Registers (D29:F7)
Table 12-1. USB EHCI PCI Configuration Register Address Map (D29:F7) (Sheet 2 of 2)
Offset
Mnemonic
Register Name
6C–6Fh LEG_EXT_CS USB EHCI Legacy Support Control/Status
70–73h
74–7F
80h
DC–DFh
SPECIAL_SMI
ACCESS_CNTL
USB_REF_V
Intel Specific USB EHCI SMI
Reserved
Access Control
USB HS Reference Voltage Register
Default
Value
00000000h
00000000h
0
00h
00000000h
Type
R/W, R/WC,
RO
R/WC, R/W
RO
R/W
R/W
NOTE: Refer to the ICH4 Specification Update for the value of the Revision ID Register.
12.1.1
VID—Vendor ID Register (USB EHCI—D29:F7)
Offset Address: 00–01h
Default Value: 8086h
Attribute:
Size:
RO
16 bits
Bit
Description
15:0 Vendor Identification Value — RO. This is a 16-bit value assigned to Intel.
12.1.2
DID—Device ID Register (USB EHCI—D29:F7)
Offset Address: 02–03h
Default Value: 24CDh
Attribute:
Size:
RO
16 bits
Bit
Description
15:0
Device Identification Value — RO. This is a 16-bit value assigned to the ICH4 USB EHCI
controller.
418
Intel^® 82801DB ICH4 Datasheet