Product specifications
VT8235 V-Link South Bridge
Revision 1.22 October 24, 2002 -31- Register Overview
Device 17 Function 1 Registers – IDE Controller
Configuration Space IDE Header Registers
Offset
Confi
g
uration S
p
ace Header Default Acc
1-0 Vendor ID
1106
RO
3-2 Device ID
0571
RO
5-4 Command
0080
RO
7-6 Status
0290 RW
8 Revision ID
nn
RO
9 Programming Interface
85 RW
A Sub Class Code
01
RO
B Base Class Code
01
RO
C-F -reserved- 00 —
13-10 Base Address – Pri Data / Command
000001F1 RW
17-14 Base Address – Pri Control / Status
000003F5 RW
1B-18 Base Address – Sec Data / Command
00000171 RW
1F-1C Base Address – Sec Control / Status
00000375 RW
23-20 Base Address – Bus Master Control
0000CC01 RW
24-2B -reserved- (unassigned) 00 —
2D-2C Sub Vendor ID 0000 RO
2F-2E Sub Device ID 0000 RO
30-33 -reserved- (expan ROM base addr) 00 —
34 Capability Pointer
C0
RO
35-3B -reserved- (unassigned) 00 —
3C Interrupt Line
0E
RO
3D Interrupt Pin 00 RO
3E Minimum Grant 00 RO
3F Maximum Latency 00 RO
Configuration Space IDE-Specific Registers
Offset
Confi
g
uration S
p
ace IDE Re
g
isters Default Acc
40 IDE Chip Enable 00 RW
41 IDE Configuration I 00 RW
42 IDE Configuration II 00 RW
43 IDE FIFO Configuration
0A
RW
44 IDE Miscellaneous Control 1
08
RW
45 IDE Miscellaneous Control 2
10
RW
46 IDE Miscellaneous Control 3
C0
RW
4B-48 IDE Drive Timing Control
A8A8A8A8
RW
4C IDE Address Setup Time
FF
RW
4D -reserved- (do not program) 00 RW
4E Sec Non-1F0 Port Access Timing
B6
RW
4F Pri Non-1F0 Port Access Timing
B6
RW
Configuration Space IDE-Specific Registers (continued)
Offset
Confi
g
uration S
p
ace IDE Re
g
isters Default Acc
53-50 UltraDMA Extended Timing Control
07070707
RW
54 UltraDMA FIFO Control
04
RW
55 IDE Clock Gating 00 RW
56-5F -reserved- 00 —
61-60 IDE Primary Sector Size
0200
RW
62-67 -reserved- 00 —
69-68 IDE Secondary Sector Size
0200
RW
69-6F -reserved- 00 —
70 IDE Primary Status 00 RW
71 IDE Primary Interrupt Control
01
RW
72-77 -reserved- 00 —
78 IDE Secondary Status 00 RW
79 IDE Secondary Interrupt Control
01
RW
7A-7F -reserved- 00 —
83-80 IDE Primary S/G Descriptor Address 0000 0000 RW
84-87 -reserved- 00 —
8B-88 IDE Secondary S/G Descriptor Addr 0000 0000 RW
8C-BF -reserved- 00 —
C3-C0 Power Management Capabilities
0002 0001 RO
C7-C4 Power State 0000 0000 RW
C8-CF -reserved- 00 —
Offset
IDE Back Door Registers Default Acc
D0 Back Door – Revision ID
06
RW
D1 -reserved- 00 —
D3-D2 Back Door – Device ID
0571
RW
D5-D4 Back Door – Sub Vender ID 0000 RW
D7-D6 Back Door – Sub Device ID 0000 RW
D8-F5 -reserved- 00 —
F6 IDE New Revision ID
07 RO
F7-FF -reserved- 00 —
I/O Registers – IDE Controller (SFF 8038 v1.0 Compliant
Offset
IDE I/O Registers Default Acc
0 Primary Channel Command 00 RW
1 -reserved- 00 —
2 Primary Channel Status 00
WC
3 -reserved- 00 —
4-7 Primary Channel PRD Table Addr 00 RW
8 Secondary Channel Command 00 RW
9 -reserved- 00 —
A Secondary Channel Status 00
WC
B -reserved- 00 —
C-F Secondary Channel PRD Table Addr 00 RW