參數(shù)資料
型號: AK4671EG
廠商: Asahi Kasei Microsystems Co.,Ltd
元件分類: Codec
英文描述: Stereo CODEC with MIC/RCV/HP-AMP
中文描述: 立體聲編解碼器麥克風/垃圾車/惠普腺苷
文件頁數(shù): 162/164頁
文件大?。?/td> 1792K
代理商: AK4671EG
[AK4671]
MS0666-E-00
2007/10
- 162 -
Stop of Clock
Master clock can be stopped when ADC and DAC are not used.
1. PCM I/F A Slave Mode
External SYNCA
PMPCM bit
(Addr:53H, D2)
Input
(1)
(2)
External BICKA
Input
(2)
Example
PCM I/F A Format : Linear, Short Frame (ADC & DAC)
PLLBT Reference clock: SYNCA
SYNCA frequency: 1fs2
Sampling Frequency: 8kHz
(1) Addr:53H, Data:00H
(2) Stop the external clocks
Figure 127. Clock Stopping Sequence (1)
<Example>
(1)
Power down PLLBT: PMPCM bit = “1”
“0”
(2)
Stop the external SYNCA and BICKA clocks
2. PCM I/F A Master Mode
External SYNCB
PMPCM bit
(Addr:53H, D2)
Input
(1)
(2)
External BICKB
Input
(2)
BICKA
Output
SYNCA
Output
"H" or "L"
"H" or "L"
Example
PCM I/F A Format : Linear, Short Frame (ADC & DAC)
PLLBT Reference clock: SYNCB
SYNCB frequency: 1fs2
Sampling Frequency: 8kHz
(1) Addr:53H, Data:00H
(2) Stop the external clocks
Figure 128. Clock Stopping Sequence (2)
< Example >
(1)
Power down PLLBT: PMPCM bit = “1”
“0”
(2)
Stop the external SYNCB and BICKB clocks. SYNCA and BICKA are fixed to “H” or “L”.
Power down
Power supply current can be shut down (typ. 20
μ
A) by stopping clocks and setting PMVCM bit = “0” after all blocks
except for VCOM are powered-down. Power supply current can be also shut down (typ. 1
μ
A) by stopping clocks and
setting the PDN pin = “L”. When the PDN pin = “L”, the registers are initialized.
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