49 / 84 page
We Connect
We Connect
We Connect
We Connect
Technologies, Inc.
Revision 2.4, May 28, 2002
4 - 17
Hardware Interfaces & Interface Registers
VT1712 - PCI Multi-Channel Audio Controller
CCI30: Consumer Section Power Down
Index: 30h
Default Value: 00h
CCI31: Multi-Track Section Power Down
Index: 31h
Default Value: 00h
There are four power states defined in the PCI bus power management spec.
Bit
Attribute
Description
7
R/W
1: Crystal clock generation power down for XTAL_1
6
R/W
1: Game port analogpower down
5R/W
Reserved.
4
R/W
1: Stop I²C port clock
3
R/W
1: Stop MIDI clock
2
R/W
1: Stop AC’97 clock
1
R/W
1: Stop DS Block clock
0
R/W
1: Stop PCI clock for SB, DMA controller (excluding PCI BIU, config. space and this register)
Bit
Attribute
Description
7
R/W
1: Crystal clock generation power down for XTAL_2
6:3
R/W
Reserved
2
R/W
1: Stop S/PDIF clock
1
R/W
1: Stop Professional digital mixer clock
0
R/W
1: Stop Multi-track I²S serial interface clock
States
Description
D0
Normal operation state after system power up or internal reset
D1
not supported.
D2
Power down all the blocks defined in the power down registers.
D3(hot)
Same as D2 state, except a transition to D0 will generate an internal reset (incl. PCI config. space)
English ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
