Intel 6 SERIES CHIPSET - DATASHEET 01-2011 - Page 645

Datasheet 645
EHCI Controller Registers (D29:F0, D26:F0)
16.1.5 RID—Revision Identification Register
(USB EHCI—D29:F0, D26:F0)
Offset Address: 08h Attribute: RO
Default Value: See bit description Size: 8 bits
16.1.6 PI—Programming Interface Register
(USB EHCI—D29:F0, D26:F0)
Address Offset: 09h Attribute: RO
Default Value: 20h Size: 8 bits
16.1.7 SCC—Sub Class Code Register
(USB EHCI—D29:F0, D26:F0)
Address Offset: 0Ah Attribute: RO
Default Value: 03h Size: 8 bits
16.1.8 BCC—Base Class Code Register
(USB EHCI—D29:F0, D26:F0)
Address Offset: 0Bh Attribute: RO
Default Value: 0Ch Size: 8 bits
Bit Description
7:0
Revision ID — RO. See the Intel
®
6 Series Chipset Specification Update for the value
of the RID Register.
Bit Description
7:0
Programming Interface — RO. A value of 20h indicates that this USB 2.0 host
controller conforms to the EHCI Specification.
Bit Description
7:0
Sub Class Code (SCC) — RO.
03h = Universal serial bus host controller.
Bit Description
7:0
Base Class Code (BCC) — RO.
0Ch = Serial bus controller.