Product specifications

VT8235 V-Link South Bridge

Revision 1.22 October 24, 2002 -60- Device 16 Function 3 USB 2.0 EHCI Registers

EHCI USB 2.0 I/O Registers

These registers are compliant with the EHCI v1.0 standard.

Refer to the EHCI v1.0 specification for further details.

EHCI Capabilities

I/O Offset 0 - Capability Register Length (10h)

I/O Offset 3-2 - Interface Version Number (0100h) ......RO†

I/O Offset 7-4 – Structure Parameters (0000 3206h) ....RO†

I/O Offset B-8 – Capability Parameters (0000 6872h) .RO†

† RW if Rx42[4] = 1.

Host Controller Operations

I/O Offset 13-10 - USB Command

I/O Offset 17-14 - USB Status

I/O Offset 1B-18 - USB Interrupt Enable

I/O Offset 1F-1C - USB Frame Index

I/O Offset 23-20 - 4G Segment Selector

I/O Offset 27-24 - Frame List Base Address

I/O Offset 2B-28 - Next Asynchronous List Address

I/O Offset 53-50 - Configured Flags

I/O Offset 57-54 - Port 0 Status / Control

I/O Offset 5B-58 - Port 1 Status / Control