WM8904
预生产
MICBIAS电流检测...................................................................................................................................... 43
MICBIAS电流检测滤波.................................................................................................................. 44
话筒叉簧检测.............................................................................................................. 46
数字麦克风接口............................................... ........................... 47
模拟到数字转换器（ADC） ......................................... .................. 49
ADC数字音量控制.............................................................................................................................. 49
高通滤波器...................................................................................................................................................... 51
ADC的过采样率（ OSR ） .......................................................................................................................... 52
动态范围控制（ DRC ） ............................................ ............................... 53
压缩/限制功能.................................................................................................................. 53
GAIN极限.................................................................................................................................................................. 55
动态特性................................................................................................................................... 55
ANTI- CLIP控制................................................................................................................................................... 56
快速释放控制....................................................................................................................................... 57
GAIN平滑....................................................................................................................................................... 57
初始化............................................................................................................................................................ 58
重新调整
TM
移动参数均衡器（ EQ） ............................................ .... 59
默认模式（ 5波段参数均衡器） ........................................................................................................... 59
TM
重新调整MOBILE MODE........................................................................................................................................... 60
EQ滤波器特性................................................................................................................................. 60
数字混音........................................................................................................... 62
数字混合PATHS .............................................................................................................................................. 62
DAC接口音量提升............................................................................................................................ 64
数字侧音...................................................................................................................................................... 64
数字 - 模拟转换器（DAC） ......................................... .................. 66
DAC数字音量控制.............................................................................................................................. 66
DAC软静音和软UN- MUTE ..................................................................................................................... 68
DAC MONO MIX ............................................................................................................................................................ 69
DAC DE-EMPHASIS...................................................................................................................................................... 69
DAC坡阻带滤波器............................................................................................................................ 70
DAC采样率（ OSR ） .......................................................................................................................... 70
输出信号路径............................................... ................................................ 71
输出信号路径ENABLE .............................................................................................................................. 72
耳机/线路输出信号路径ENABLE ........................................... ................................................ 72
输出MUX控制............................................................................................................................................. 76
输出音量CONTROL...................................................................................................................................... 76
ANALOGUE产出................................................ ................................................. 79
耳机输出 - HPOUTL和HPOUTR ............................................ .................................................. ..... 79
LINE输出 - LINEOUTL和LINEOUTR............................................................................................................ 79
外部元件接地参考的输出............................................ ........................ 80
参考电压和主BIAS ............................................. .............. 81
模拟参考和掌握BIAS .......................................................................................................... 81
低功耗回放模式................................................................................................................................ 82
POP抑制控制............................................... ................................... 83
禁用输入控制....................................................................................................................................... 83
电荷泵............................................................................................................ 84
直流伺服.................................................................................................................... 85
直流伺服使能和START-UP ......................................................................................................................... 85
直流伺服活动模式........................................................................................................................................ 88
直流伺服读回............................................................................................................................................... 90
数字音频接口............................................... ........................................ 90
Master和Slave模式工作................................................................................................................. 91
操作TDM ............................................................................................................................................... 91
BCLK频率...................................................................................................................................................... 92
w
PP ，版本3.3 ， 2012年9月
4
QQ：2880707522 复制
