WM8945
目录
生产数据
描述....................................................................................................... 1
特点............................................................................................................ 1
APPLICATIONS..................................................................................................... 1
目录............................................... .......................................... 2
框图................................................ ................................................ 5
引脚配置................................................ .......................................... 6
订购信息................................................ .................................. 6
引脚说明................................................ ................................................ 7
绝对最大额定值............................................... ......................... 8
推荐工作条件............................................... ...... 8
热性能................................................ ................................. 9
电气特性................................................ ................... 10
术语............................................................................................................. 13
典型性能................................................ ................................. 14
耗电量................................................ .............................................. 15
音频信号路径框图.............................................. ...................... 16
信号时序要求............................................... ..................... 17
系统时钟时序............................................... ............................................... 17
音频接口时序............................................... .......................................... 17
主模式........................................................................................................................................ 17
从模式........................................................................................................................................... 18
控制接口时序............................................... .................................... 19
设备描述................................................ ...................................... 22
引言............................................................................................................ 22
模拟输入信号路径.............................................. ................................. 23
输入PGA启用................................................................................................................................ 24
输入PGA配置................................................................................................................ 24
麦克风偏置控制.............................................................................................................. 25
输入PGA增益控制................................................................................................................... 25
数字麦克风接口............................................... ........................... 27
模拟到数字转换器(ADC) ......................................... ................... 28
ADC VOLUME CONTROL......................................................................................................................... 28
ADC高通滤波器......................................................................................................................... 31
DSP内核..................................................................................................................... 32
DSP配置模式.............................................................................................................. 32
低通/高通滤波器( LPF / HPF ) ..................................... .................................................. ... 33
5 -NOTCH FILTER ..................................................................................................................................... 34
DF1 FILTER............................................................................................................................................... 35
TM
重新调谐滤波器................................................................................................................................... 35
5波段均衡器............................................................................................................................................... 36
动态范围控制( DRC ) ....................................................................................................... 36
信号增强寄存器控制.............................................. ................................... 36
动态范围控制( DRC ) ............................................ ............................... 37
DRC压缩/解压缩/限幅............................................ ......................................... 38
GAIN极限............................................................................................................................................. 40
GAIN READBACK ..................................................................................................................................... 41
动态特性............................................................................................................... 42
ANTI- CLIP控制............................................................................................................................... 43
快速释放控制................................................................................................................... 44
刚果(金)初值................................................................................................................................. 44
w
PD , 2011年5月,版本4.1
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