Product specifications

VT8237R Data Sheet
Revision 2.06 December 15, 2004 -92- Device 16 Function 5 USB Direct Device Communications Registers
USB Device Controller Interface (UDCI) Memory Mapped
I/O Registers
USB Communications Capability
Offset 0 – Capability Register Length (10h) ....................RO
7-0 Capability Register Length ..........always reads 10h
Offset 1 – Interface Version (10h).....................................RO
7-0 Interface Version Number ...........always reads 10h
Offset 3-2 – Structure Parameters 1 (0121h) ...................RO
15-12 Number of Isochronous Endpoints Implemented
...................................... always reads 0h
11-8 Number of Interrupt In Endpoints Implemented
.....................................always reads 1h
7-4 Number of Bulk Endpoints Implemented
.....................................always reads 2h
This field shows the actual hardware that is capable
of independently managing streams.
3-0 Number of Control Endpoints Implemented
.....................................always reads 1h
Offset 7-4 – Structure Parameters 2 (0200 0040h) ..........RO
31-16 Endpoint 1 Max FIFO Size ......always reads 0200h
15-0 Endpoint 0 Max FIFO Size ......always reads 0040h
Offset B-8 – Structure Parameters 3 (0008 0200h)..........RO
31-16 Endpoint 3 Max FIFO Size ......always reads 0008h
15-0 Endpoint 2 Max FIFO Size ......always reads 0200h
USB Shadow Registers
Offset F-C – EHCI Port 0 Shadow................................... RO
This register shadows the EHCI Port 0 Status register.