WM8944BECSSLASHR datasheet(2/165 Pages) CIRRUS

2 / 165 page

WM8944B

Rev 4.3

TABLE OF CONTENTS

DESCRIPTION................................................................................................................ 1

FEATURES ..................................................................................................................... 1

APPLICATIONS.............................................................................................................. 1

TABLE OF CONTENTS.................................................................................................. 2

BLOCK DIAGRAM ......................................................................................................... 5

PIN CONFIGURATION ................................................................................................... 6

ORDERING INFORMATION........................................................................................... 6

PIN DESCRIPTION......................................................................................................... 7

ABSOLUTE MAXIMUM RATINGS ................................................................................. 8

RECOMMENDED OPERATING CONDITIONS.............................................................. 8

THERMAL PERFORMANCE.......................................................................................... 9

ELECTRICAL CHARACTERISTICS ............................................................................ 10

TERMINOLOGY ....................................................................................................................... 13

TYPICAL PERFORMANCE .......................................................................................... 14

TYPICAL POWER CONSUMPTION ........................................................................................ 15

AUDIO SIGNAL PATHS DIAGRAM ............................................................................. 16

SIGNAL TIMING REQUIREMENTS ............................................................................. 17

SYSTEM CLOCK TIMING........................................................................................................ 17

AUDIO INTERFACE TIMING ................................................................................................... 17

MASTER MODE ............................................................................................................................................................................17

SLAVE MODE................................................................................................................................................................................18

CONTROL INTERFACE TIMING ............................................................................................. 19

DEVICE DESCRIPTION ............................................................................................... 21

INTRODUCTION ...................................................................................................................... 21

ANALOGUE INPUT SIGNAL PATH ......................................................................................... 22

INPUT PGA ENABLE ....................................................................................................................................................................22

INPUT PGA CONFIGURATION ....................................................................................................................................................23

MICROPHONE BIAS CONTROL ..................................................................................................................................................23

INPUT PGA GAIN CONTROL .......................................................................................................................................................24

DIGITAL MICROPHONE INTERFACE .................................................................................... 26

ANALOGUE-TO-DIGITAL CONVERTER (ADC)...................................................................... 27

ADC VOLUME CONTROL.............................................................................................................................................................28

ADC HIGH PASS FILTER .............................................................................................................................................................30

DSP CORE............................................................................................................................... 31

DSP CONFIGURATION MODES ..................................................................................................................................................31

LOW-PASS / HIGH-PASS FILTER (LPF/HPF)..............................................................................................................................32

3D SURROUND.............................................................................................................................................................................33

5-NOTCH FILTER..........................................................................................................................................................................34

DF1 FILTER...................................................................................................................................................................................35

HPF................................................................................................................................................................................................35

RETUNE FILTER...........................................................................................................................................................................36

5-BAND EQ....................................................................................................................................................................................36

DYNAMIC RANGE CONTROL (DRC) ...........................................................................................................................................37

SIGNAL ENHANCEMENT REGISTER CONTROLS.....................................................................................................................37

DYNAMIC RANGE CONTROL (DRC) ..................................................................................... 38

DRC COMPRESSION / EXPANSION / LIMITING.........................................................................................................................39

GAIN LIMITS..................................................................................................................................................................................43

GAIN READBACK .........................................................................................................................................................................44

DYNAMIC CHARACTERISTICS ...................................................................................................................................................45

ANTI-CLIP CONTROL ...................................................................................................................................................................46

WM8944BECS/R 数据表(PDF) 2 Page - Cirrus Logic

WM8944BECS/R 数据表(HTML) 2 Page - Cirrus Logic

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