WM9705 datasheet(2/55 Pages) WOLFSON

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WM9705

Production Data

PD Rev 4.4 August 2006

TABLE OF CONTENTS

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

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

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

BLOCK DIAGRAM ......................................................................................................1

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

ORDERING INFORMATION .......................................................................................4

ABSOLUTE MAXIMUM RATINGS ..............................................................................4

RECOMMENDED OPERATING CONDITIONS ..........................................................5

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

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

POWER CONSUMPTION .........................................................................................12

DETAILED TIMING DIAGRAMS ...............................................................................13

AC-LINK LOW POWER MODE .........................................................................................13

COLD RESET....................................................................................................................13

WARM RESET ..................................................................................................................14

CLOCK SPECIFICATIONS ...............................................................................................14

DATA SETUP AND HOLD (50PF EXTERNAL LOAD).......................................................15

SIGNAL RISE AND FALL TIMES ......................................................................................15

DEVICE DESCRIPTION ............................................................................................16

INTRODUCTION ...............................................................................................................16

AC’97 FEATURES.............................................................................................................16

NON - AC’97 FEATURES..................................................................................................17

PEN DIGITIZER AND AUXILIARY ADC ............................................................................19

3-D STEREO ENHANCEMENT.........................................................................................19

VARIABLE SAMPLE RATE SUPPORT .............................................................................20

SPDIF OR I

2S DIGITAL AUDIO DATA OUTPUT...............................................................20

PRIMARY/SECONDARY ID SUPPORT ............................................................................21

HEADPHONE DRIVE AND HEADSET AUTODETECT .....................................................21

DATA SLOT MAPPING .....................................................................................................23

AC-LINK DIGITAL SERIAL INTERFACE PROTOCOL ......................................................23

AC-LINK AUDIO OUTPUT FRAME (SDATAOUT) ............................................................25

AC-LINK AUDIO INPUT FRAME (SDATAIN) ....................................................................27

AC-LINK LOW POWER MODE .........................................................................................29

WAKING UP THE AC-LINK...............................................................................................29

SERIAL INTERFACE REGISTER MAP DESCRIPTION....................................................30

REGISTERS 3AH – SPDIF CONTROL REGISTER ..........................................................36

VENDOR SPECIFIC REGISTERS (INDEX 5AH - 7AH) ....................................................36

SERIAL INTERFACE REGISTER MAP ....................................................................39

PEN DIGITISER OPERATION ..................................................................................40

TIMING OF PEN DIGITISER OPERATIONS.....................................................................41

CONTROL OF PEN DIGITISER FUNCTIONS ..................................................................41

READBACK OF PEN DIGITISER RESULTS.....................................................................42

CONVERSION CONTROL ................................................................................................43

PRESSURE MEASUREMENT ..........................................................................................48

MASK FUNCTION .............................................................................................................49

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