预产
WM8941
目录
描述................................................................................................................1
FEATURES......................................................................................................................1
应用..............................................................................................................1
框图..........................................................................................................2
PIN CONFIGURATION....................................................................................................5
订购信息................................................ ........................................... 5
引脚说明.........................................................................................................6
绝对最大额定值............................................... ................................... 7
推荐工作条件............................................... ............... 7
电气特性................................................ ............................... 8
术语....................................................................................................................10
AUDIO PATHS概述............................................... ........................................... 12
信号时序要求............................................... ............................... 14
系统时钟时序.....................................................................................................14
音频接口时序 - 主模式............................................ ...................... 14
音频接口时序 - 从模式............................................ .......................... 15
控制接口时序 - 3线模式.......................................... .................... 16
控制接口时序 - 2线模式.......................................... .................... 17
设备DESCRIPTION................................................................................................18
引言...................................................................................................................18
输入信号路径...........................................................................................................19
模拟数字转换器（ ADC） ........................................... ......................... 25
输入限制器/自动电平控制（ ALC ） ......................................... ........... 30
输出信号路径.......................................................................................................43
音量提升..................................................................................................................45
ANALOGUE OUTPUTS.........................................................................................................47
输出开关................................................................................................................50
视频缓冲器....................................................................................................................53
DIGITAL AUDIO INTERFACES.............................................................................................58
音频采样率.......................................................................................................62
主时钟，锁相环（ PLL ） ......................................... ................ 63
COMPANDING......................................................................................................................66
通用输入/输出............................................. ................................... 68
控制INTERFACE........................................................................................................68
3线串行控制模式............................................ .......................................... 70
回读3线模式............................................ ................................................. 70
2线串行控制模式............................................ .......................................... 71
复位芯片........................................................................................................71
供电器..............................................................................................................71
电源管理......................................................................................................74
POP MINIMISATION .............................................................................................................75
注册MAP............................................................................................................76
寄存器位按地址.............................................. ............................................. 77
数字滤波器特性............................................... ......................... 89
术语....................................................................................................................89
DAC，滤波器RESPONSES...................................................................................................90
ADC滤波器RESPONSES...................................................................................................90
HIGHPASS FILTER...............................................................................................................91
陷波滤波器和低通滤波器............................................ ............................. 92
w
PP ，版本3.3 ， 2007年12月
3
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