參數(shù)資料
型號: AK4673EG
廠商: Asahi Kasei Microsystems Co.,Ltd
元件分類: Codec
英文描述: Stereo CODEC with MIC/HP-AMP and Touch Screen Controller
中文描述: 立體聲編解碼器麥克風(fēng)/惠普- AMP及觸摸屏控制器
文件頁數(shù): 104/107頁
文件大?。?/td> 1171K
代理商: AK4673EG
[AK4673]
MS0670-E-00
2007/09
- 104 -
Stop of Clock
Master clock can be stopped when ADC and DAC are not used.
1.
PLL Master Mode
External MCKI
PMPLL bit
(Addr:01H, D0)
MCKO bit
(Addr:01H, D1)
Input
(3)
(1)
(2)
"1" or "0"
Example:
Audio I/F Format: MSB justified (ADC & DAC)
BICK frequency at Master Mode: 64fs
Input Master Clock Select at PLL Mode: 11.2896MHz
Sampling Frequency: 8kHz
(3) Stop an external MCKI
(1) (2) Addr:01H, Data:08H
Figure 93. Clock Stopping Sequence (1)
<Example>
(1)
Power down PLL: PMPLL bit = “1”
“0”
(2)
Stop MCKO clock: MCKO bit = “1”
“0”
(3)
Stop an external master clock.
2.
PLL Slave Mode (LRCK or BICK pin)
External BICK
PMPLL bit
(Addr:01H, D0)
Input
(1)
(2)
External LRCK
Input
(2)
Example
Audio I/F Format : MSB justified (ADC & DAC)
PLL Reference clock: BICK
BICK frequency: 64fs
Sampling Frequency: 8kHz
(1) Addr:01H, Data:00H
(2) Stop the external clocks
Figure 94. Clock Stopping Sequence (2)
<Example>
(1)
Power down PLL: PMPLL bit = “1”
“0”
(2)
Stop the external BICK and LRCK clocks
3.
PLL Slave (MCKI pin)
External MCKI
PMPLL bit
(Addr:01H, D0)
Input
(1)
(2)
MCKO bit
(Addr:01H, D1)
(1)
Example
Audio I/F Format: MSB justified (ADC & DAC)
PLL Reference clock: MCKI
BICK frequency: 64fs
Sampling Frequency: 8kHz
(1) Addr:01H, Data:00H
(2) Stop the external clocks
Figure 95. Clock Stopping Sequence (3)
<Example>
(1)
Power down PLL: PMPLL bit = “1”
“0”
(2)
Stop MCKO output: MCKO bit = “1”
“0”
(3)
Stop the external master clock.
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