
VT8231
Preliminary Revision 0.8
October 29, 1999
-34-
Register Overview
7HFKQRORJLHV,QF
:H &RQQHFW
PCI Function 2 Registers
–
USB Controller Ports 0-1
Configuration Space USB Header Registers
Offset PCI Configuration Space Header
1-0
Vendor ID
3-2
Device ID
5-4
Command
7-6
Status
8
Revision ID
9
Programming Interface
A
Sub Class Code
B
Base Class Code
C
Cache Line Size
D
Latency Timer
E
Header Type
F
BIST
10-1F -reserved-
23-20 USB I/O Register Base Address
24-3B -reserved-
3C
Interrupt Line
3D
Interrupt Pin
3E-3F -reserved-
Default
1106
3038
0000
0200
nn
00
03
0C
00
16
00
00
00
00000301 RW
00
00
04
00
Acc
RO
RO
RW
WC
RO
RO
RO
RO
RO
RW
RO
RO
—
—
RW
RO
—
Configuration Space USB-Specific Registers
Offset USB Control
40
USB Miscellaneous Control 1
41
USB Miscellaneous Control 2
42
USB FIFO Control
43
-reserved-
44-45 -reserved- (test, do not program)
46-47 -reserved- (test)
48-5F -reserved-
60
USB Serial Bus Release Number
61-7F -reserved-
83-80 PM Capability
84
PM Capability Status
85-BF -reserved-
C1-C0 USB Legacy Support
C2-FF -reserved-
Default
00
10
00
00
Acc
RW
RW
RW
RO
RW
RO
—
RO
—
00
10
00
0002 0001
RO
00
00
2000
00
RW
—
RW
—
I/O Registers
–
USB Controller
Offset USB I/O Registers
1-0
USB Command
3-2
USB Status
5-4
USB Interrupt Enable
7-6
Frame Number
B-8
Frame List Base Address
C
Start Of Frame Modify
11-10 Port 0 Status / Control
13-12 Port 1 Status / Control
14-1F -reserved-
Default
0000
0000
0000
0000
00000000 RW
40
0080
0080
00
Acc
RW
WC
RW
RW
RW
WC
WC
—
PCI Function 3 Registers
–
USB Controller Ports 2-3
Configuration Space USB Header Registers
Offset PCI Configuration Space Header
1-0
Vendor ID
3-2
Device ID
5-4
Command
7-6
Status
8
Revision ID
9
Programming Interface
A
Sub Class Code
B
Base Class Code
C
Cache Line Size
D
Latency Timer
E
Header Type
F
BIST
10-1F -reserved-
23-20 USB I/O Register Base Address
24-3B -reserved-
3C
Interrupt Line
3D
Interrupt Pin
3E-3F -reserved-
Default
1106
3038
0000
0200
nn
00
03
0C
00
16
00
00
00
00000301 RW
00
00
04
00
Acc
RO
RO
RW
WC
RO
RO
RO
RO
RO
RW
RO
RO
—
—
RW
RO
—
Configuration Space USB-Specific Registers
Offset USB Control
40
USB Miscellaneous Control 1
41
USB Miscellaneous Control 2
42
USB FIFO Control
43
-reserved-
44-45 -reserved- (test only, do not program)
46-47 -reserved- (test)
48-5F -reserved-
60
USB Serial Bus Release Number
61-7F -reserved-
83-80 PM Capability
84
PM Capability Status
85-BF -reserved-
C1-C0 USB Legacy Support
C2-FF -reserved-
Default
00
10
00
00
Acc
RW
RW
RW
RO
RW
RO
—
RO
—
00
10
00
0002 0001
RO
00
00
2000
00
RW
—
RW
—
I/O Registers - USB Controller
Offset USB I/O Registers
1-0
USB Command
3-2
USB Status
5-4
USB Interrupt Enable
7-6
Frame Number
B-8
Frame List Base Address
C
Start Of Frame Modify
11-10 Port 2 Status / Control
13-12 Port 3 Status / Control
14-1F -reserved-
Default
0000
0000
0000
0000
00000000 RW
40
0080
0080
00
Acc
RW
WC
RW
RW
RW
WC
WC
—