WM8903
生产数据
数字麦克风接口............................................... ........................... 40
模拟到数字转换器（ADC） ......................................... ................... 42
ADC数字音量控制................................................................................................................................ 42
高通滤波器（ HPF ） ............................................................................................................................................. 45
ADC的过采样率（ OSR ） ............................................................................................................................ 46
动态范围控制（ DRC ） ............................................ ............................... 46
压缩/限制功能.................................................................................................................... 46
GAIN LIMITS.................................................................................................................................................................... 48
动态特性..................................................................................................................................... 49
ANTI- CLIP控制..................................................................................................................................................... 50
快速释放控制......................................................................................................................................... 50
GAIN平滑......................................................................................................................................................... 51
初始化.............................................................................................................................................................. 52
数字混音............................................................................................................ 53
数字混合PATHS ................................................................................................................................................ 53
DAC接口音量提升.............................................................................................................................. 54
DIGITAL SIDETONE........................................................................................................................................................ 55
数字 - 模拟转换器（DAC） ......................................... ................... 56
DAC数字音量控制................................................................................................................................ 57
DAC软静音和软UN- MUTE ....................................................................................................................... 59
DAC MONO MIX .............................................................................................................................................................. 60
DAC DE-EMPHASIS........................................................................................................................................................ 60
DAC坡阻带滤波器.............................................................................................................................. 61
DAC BIAS CONTROL...................................................................................................................................................... 61
DAC采样率（ OSR ） ............................................................................................................................ 62
输出信号路径............................................... ................................................. 63
输出信号路径ENABLE ................................................................................................................................ 64
耳机/线路输出信号路径ENABLE ........................................... .................................................. 65
输出PGA偏置控制...................................................................................................................................... 68
输出驱动偏置控制............................................................................................................................. 68
输出混音器控制........................................................................................................................................... 69
输出音量控制....................................................................................................................................... 71
ANALOGUE产出................................................ ................................................. 75
耳机输出 - HPOUTL和HPOUTR ..................................................................................................... 75
LINE输出 - LINEOUTL和LINEOUTR ............................................................................................................. 75
差分线路输出 - LON / LOP和罗恩/ ROP ....................................... ............................................... 75
外部元件接地为参考的输出........................................... ........................... 76
参考电压和主BIAS ............................................. .............. 77
POP抑制控制............................................... ................................... 79
禁用输入/输出控制....................................................................................................................... 79
差分线路输出放电控制............................................. ................................................. 79
电荷泵............................................................................................................. 80
直流伺服..................................................................................................................... 81
数字音频接口............................................... ......................................... 84
Master和Slave模式工作................................................................................................................... 84
操作TDM ................................................................................................................................................. 85
BCLK频率........................................................................................................................................................ 86
音频数据格式（正常模式） .................................................................................................................. 86
音频数据格式（ TDM模式） ......................................................................................................................... 88
数字音频接口控制.............................................. ....................... 90
BCLK和LRCLK控制........................................................................................................................................ 91
扩................................................................................................................................................................ 93
LOOPBACK ..................................................................................................................................................................... 94
话筒叉簧检测................................................................................................................ 39
w
PD ，版本4.5 ， 2012年6月
4
QQ：2881677436 复制
