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參數(shù)資料
| 型號： | WM9712LEFT |
| 廠商： | Wolfson Microelectronics |
| 元件分類： | Codec |
| 英文描述： | AC97 Audio and Touchpanel CODEC |
| 中文描述： | AC97音頻編解碼器和觸摸屏 |
| 文件頁數(shù)： | 55/78頁 |
| 文件大?。?/td> | 689K |
| 代理商： | WM9712LEFT |
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Production Data
WM9712L
w
PD Rev 4.0 December 2003
55
POWER MANAGEMENT
The WM9712L includes the standard power down control register defined by the AC’97 specification
(register 26h). Additionally, it also allows more specific control over the individual blocks of the device
through register 24h. Each particular circuit block is active when both the relevant bit in register 26h
AND the relevant bit in register 24h are set to ‘0’.
DEFAULT
REGISTER
ADDRESS
BIT
LABEL
NORMAL
PIN 47 ‘HI’
DURING
RESET
1 (OFF)
DESCRIPTION
14
PR6
0 (ON)
Disables HPOUTL, HPOUTR and
OUT3 Buffer
Disables internal clock
Disables AC-link interface
(external clock off)
Disables VREF, analogue mixers
and outputs
Disables analogue mixers,
LOUT2, ROUT2 (but not VREF)
Disables stereo DAC
Disables audio ADCs and input
Mux
Read-only bit, indicates VREF is
ready (inverse of PR2)
Read-only bit, indicates analogue
mixers are ready (inverse of PR3)
Read-only bit, indicates audio
DACs are ready (inverse of PR1)
Read-only bit, indicates audio
ADCs are ready (inverse of PR0)
13
12
PR5
PR4
0 (ON)
0 (ON)
1 (OFF)
1 (OFF)
11
PR3
0 (ON)
1 (OFF)
10
PR2
0 (ON)
1 (OFF)
9
8
PR1
PR0
0 (ON)
0 (ON)
1 (OFF)
1 (OFF)
3
REF
1
0
2
ANL
1
0
1
DAC
1
0
26h
Powerdown/
Status
register
0
ADC
1
0
Table 41 Powerdown and Status Register (Conforms to AC’97 Rev 2.2)
As can be seen from the table above, most blocks are ‘ON’ by default. However, if pin 47
(GPIO4/ADA/MASK) is held high during reset, the WM9712L starts up with all blocks powered down
by default, saving power. This is achieved by connecting a pull-up resistor (e.g. 100k
) from pin 47
to DBVDD. Note that the state of pin 47 during reset
only affects register 26h.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| WM9712LEFV | AC97 Audio and Touchpanel CODEC |
| WM9712LSEFL | AC97 Audio and Touchpanel CODEC |
| WM9712LSEFT | AC97 Audio and Touchpanel CODEC |
| WM9712LSEFV | AC97 Audio and Touchpanel CODEC |
| WME128K8-XXX | 128Kx8 CMOS MONOLITHIC EEPROM, SMD 5962-96796 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| WM9712LEFT/RV | 制造商:WOLFSON 制造商全稱:WOLFSON 功能描述:AC97 Audio and Touchpanel CODEC |
| WM9712LEFV | 制造商:WOLFSON 制造商全稱:WOLFSON 功能描述:AC97 Audio and Touchpanel CODEC |
| WM9712LGEFL/RV | 功能描述:接口—CODEC STR AC’97 CODEC TP 48-pin TQFP RoHS:否 制造商:Texas Instruments 類型: 分辨率: 轉(zhuǎn)換速率:48 kSPs 接口類型:I2C ADC 數(shù)量:2 DAC 數(shù)量:4 工作電源電壓:1.8 V, 2.1 V, 2.3 V to 5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:DSBGA-81 封裝:Reel |
| WM9712LGEFL/V | 功能描述:接口—CODEC Stereo AC’97 CODEC T/P Interface RoHS:否 制造商:Texas Instruments 類型: 分辨率: 轉(zhuǎn)換速率:48 kSPs 接口類型:I2C ADC 數(shù)量:2 DAC 數(shù)量:4 工作電源電壓:1.8 V, 2.1 V, 2.3 V to 5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:DSBGA-81 封裝:Reel |
| WM9712LSEFL | 制造商:WOLFSON 制造商全稱:WOLFSON 功能描述:AC97 Audio and Touchpanel CODEC |
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