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參數(shù)資料
| 型號： | WM9703 |
| 廠商： | Wolfson Microelectronics |
| 英文描述： | TVS UNIDIRECT 400W 22V SMA |
| 中文描述： | AC97音頻編解碼器2.1版 |
| 文件頁數(shù)： | 26/30頁 |
| 文件大小： | 239K |
| 代理商： | WM9703 |
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WM9703
Production Data
WOLFSON MICROELECTRONICS LTD
PD Rev 3.4 January 2001
26
DATA BIT
VRA
DRA
VRM
CDAC
SDAC
LDAC
AMAP
ID1
ID0
FUNCTION
Variable rate audio support
Double rate audio support
Variable rate Mic ADC support
Centre DAC support
Surround DAC support
LFE DAC support
Slot to front DAC mapping support
Codec configuration
–
pin 45 value
Codec configuration
–
pin 46 value
ANY MODE
1
0
0
0
0
0
1
Inverse of level at pin 45
Inverse of level at pin 46
Table 18 Extended Audio Capability Register
REGISTER 2Ah
–
EXTENDED AUDIO STATUS AND CONTROL REGISTER
The Extended Audio Status and Control Register is a read/write register that provides status and
control of the extended audio features.
DATA BIT
VRA
DRA
VRM
CDAC
SDAC
LDAC
MADC
PRI
PRJ
PRK
PRL
FUNCTION
Enables variable rate audio mode
Enable double rate audio mode
Enables variable rate Mic ADC
Indicates centre DAC ready
Indicates surround DAC ready
Indicates LFE DAC ready
Indicates Mic ADC ready
Set to turn off centre DAC
Set to turn off surround DACs
Set to turn off LFE DACs
Set to turn off Mic ADC
READ/WRITE
Read/write
Read/write
Read/write
Read
Read
Read
Read
Read/write
Read/write
Read/write
Read/write
WM9703 SUPPORT
Yes
No
No
Yes
Yes
Yes
No
Enable only
Enable only
Enable only
No
Table 19 Extended Audio Status and Control Register
REGISTER 2Ch TO 32h
–
AUDIO SAMPLE RATE CONTROL REGISTERS
These registers are read/write registers that are written to, to select alternative sample rates for the
audio PCM converters. Default is the 48ks/s rate. Note that only Revision 2.1 recommended rates
are supported by the WM9703, selection of any other unsupported rates will cause the rate to default
to the nearest supported rate, and the supported rate value to be latched and so read back.
Register 2Ch is the front DAC rate register, but is also used for centre channel data rate.
REGISTERS 36h AND 38h
–
6 CHANNEL VOLUME CONTROL
These read/write registers control the output volume of the optional four PCM channels. (not
supported by the WM9703)
VENDOR RESERVED REGISTERS (INDEX 5Ah AND 7Ah)
These registers are vendor specific. Do not write to these registers unless the Vendor ID register has
been checked first to ensure that the driver knows the source of the AC
‘
97 component.
VENDOR SPECIFIC GAIN CONTROL REGISTERS
–
(INDEX 70h TO 74h)
Not used in the WM9703.
VENDOR ID REGISTERS (INDEX 7Ch TO 7Eh)
This register is for specific vendor identification if so desired. The ID method is Microsoft
’
s Plug and
Play Vendor ID code. The first character of that ID is F7 to F0, the second character S7 to S0, and
the third T7 to T0. These three characters are ASCII encoded. The REVISION7 to REVISION0 field
is for the Vendor Revision number. In the WM9703 the vendor ID is set to WML3.
Wolfson is a registered Microsoft Plug and Play vendor.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| WM9712L | AC97 Audio and Touchpanel CODEC |
| WM9712LEFL | AC97 Audio and Touchpanel CODEC |
| WM9712LEFT | AC97 Audio and Touchpanel CODEC |
| WM9712LEFV | AC97 Audio and Touchpanel CODEC |
| WM9712LSEFL | AC97 Audio and Touchpanel CODEC |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| WM9703CFT/V | 制造商:WOLFSON 制造商全稱:WOLFSON 功能描述:AC97 Revision 2.1 Audio Codec |
| WM9704CFT/V | 制造商:WOLFSON 制造商全稱:WOLFSON 功能描述:4-Channel Surround Sound Codec |
| WM9704M | 制造商:WOLFSON 制造商全稱:WOLFSON 功能描述:AMC97 Audio and Modem Codec |
| WM9704Q | 制造商:WOLFSON 制造商全稱:WOLFSON 功能描述:4-Channel Surround Sound Codec |
| WM9705 | 制造商:WOLFSON 制造商全稱:WOLFSON 功能描述:Multimedia AC97 CODEC with Integrated Touch Screen Controller |
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