生产数据
WM8351
概述................................................ ............................... 45
12.1.1
时钟音频编解码器.............................................. .......................................... 46
12.1.2
时钟的DC -DC转换器............................................ ................................ 46
12.1.3
内部RC振荡器............................................... ............................................... 46
12.2晶振............................................... .................................. 46
12.3时钟和采样率............................................. ..................... 47
12.3.1
系统时钟CONTROL............................................................................................................. 49
12.3.2
ADC / DAC采样率............................................. .................................................. 50
12.3.3
BCLK控制................................................................................................................. 52
12.3.4
ADCLRCLK / DACLRCLK控制.............................................. .................................... 54
12.3.5
OPCLK CONTROL............................................................................................................... 55
12.3.6
SLOWCLK控制......................................................................................................... 55
12.4 FLL ................................................................................................................... 55
12.4.1
例FLL计算............................................... ............................................ 58
12.4.2
例FLL设置............................................... .................................................. 59
13
音频编解码器子系统............................................... ..................... 60
13.1概述............................................... ................................ 60
13.2 AUDIO PATHS ............................................... .................................................. 61
13.3使音频编解码器............................................. ........................ 62
13.4输入信号路径.............................................. ........................................ 64
13.4.1
麦克风输入...................................................................................................... 64
13.4.2
使前置放大器............................................. ....................................... 65
13.4.3
选择输入信号............................................... .............................................. 65
13.4.4
控制预放大器增益............................................ ....................... 66
13.4.5
麦克风偏置..................................................................................................... 67
13.4.6
辅助输入（ IN3L和IN3R ） ........................................... ..................................... 68
13.4.7
输入调音台.................................................................................................................... 69
13.5模拟数字转换器（ ADC） .......................................... .... 71
13.5.1
ADC音量控制............................................... .................................................. .. 73
13.5.2
ADC的高通滤波............................................. .................................................. ..... 73
13.6数字调音............................................... ............................................... 74
13.6.1
数字侧音............................................................................................................ 74
13.7数模转换器（ DAC ） .......................................... .... 75
13.7.1
DAC回放音量控制.............................................. ................................. 76
13.7.2
DAC软静音和软UN- MUTE .......................................... ................................. 76
13.7.3
DAC去加重............................................................................................................ 77
13.7.4
DAC输出相和单声道混音............................................ .......................... 78
13.7.5
DAC阻带衰减............................................... ........................................ 78
13.8输出信号路径.............................................. .................................... 79
13.8.1
使能模拟输出.............................................. .............................. 79
13.8.2
输出混频器................................................................................................................ 80
13.9 ANALOGUE产出............................................... ..................................... 83
13.9.1
OUT1L和OUT1R ............................................................................................................ 83
13.9.2
OUT2L和OUT2R ............................................................................................................ 85
13.9.3
耳机输出外部连接.............................................. ....... 87
13.9.4
OUT3和OUT4................................................................................................................. 89
13.10数字音频接口.............................................. ............................ 91
13.10.1
音频数据格式..................................................................................................... 91
13.10.2
音频接口TDM模式.............................................. .......................................... 94
13.10.3
TDM数据格式........................................................................................................ 94
13.10.4
LOOPBACK.......................................................................................................................... 97
13.11扩................................................ ................................................. 97
13.12附加编解码功能.............................................. .................. 99
13.12.1
耳机插孔检测............................................... .............................................. 99
12.1
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PD ， 2012年4月，修订版4.5
5
WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
