WM8741

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WM8741

TABLE OF CONTENTS

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

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

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

BLOCK DIAGRAM .................................................................................................2

TABLE OF CONTENTS .........................................................................................3

PIN CONFIGURATION...........................................................................................5

ORDERING INFORMATION ..................................................................................5

PIN DESCRIPTION (SOFTWARE CONTROL MODE) ..........................................6

PIN DESCRIPTION (HARDWARE CONTROL MODE)..........................................8

ABSOLUTE MAXIMUM RATINGS.......................................................................10

THERMAL PERFORMANCE ...............................................................................10

RECOMMENDED OPERATING CONDITIONS ...................................................11

ELECTRICAL CHARACTERISTICS ....................................................................11

MASTER CLOCK TIMING ........................................................................................... 13

PCM DIGITAL AUDIO INTERFACE TIMINGS............................................................. 13

DSD AUDIO INTERFACE TIMINGS............................................................................ 14

CONTROL INTERFACE TIMING – 3-WIRE MODE .................................................... 15

CONTROL INTERFACE TIMING – 2-WIRE MODE .................................................... 16

INTERNAL POWER ON RESET CIRCUIT.................................................................. 17

DEVICE DESCRIPTION.......................................................................................19

INTRODUCTION ......................................................................................................... 19

CLOCKING SCHEMES ............................................................................................... 19

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

SOFTWARE CONTROL INTERFACE......................................................................... 20

3-

WIRE

(SPI C

OMPATIBLE

) S

ERIAL

C

ONTROL

M

ODE

....................................................................................................... 20

3-

WIRE

C

ONTROL

I

NTERFACE

D

AISY

C

HAINING

............................................................................................................... 20

2-

WIRE

S

ERIAL

C

ONTROL

M

ODE

................................................................................................................................... 22

DIGITAL AUDIO INTERFACE ..................................................................................... 22

PCM M

ODE

................................................................................................................................................................. 22

PCM D

IGITAL

A

UDIO

I

NTERFACE

................................................................................................................................... 23

L

EFT

J

USTIFIED

M

ODE

.................................................................................................................................................. 23

R

IGHT

J

USTIFIED

M

ODE

................................................................................................................................................ 24

I

2

S M

ODE

.................................................................................................................................................................... 24

DSP M

ODE

A .............................................................................................................................................................. 25

DSP M

ODE

B .............................................................................................................................................................. 25

PCM M

ODE

S

AMPLING

R

ATES

...................................................................................................................................... 25

8FS M

ODE

.................................................................................................................................................................. 26

8FS M

ODE

S

AMPLING

R

ATES

....................................................................................................................................... 27

A

UDIO

I

NTERFACE

D

AISY

C

HAINING

...............................................................................................................................27

DSD MODE ................................................................................................................. 28

DSD D

IRECT

............................................................................................................................................................... 28

DSD P

LUS MODE

......................................................................................................................................................... 28

DSD D

IGITAL

A

UDIO

I

NTERFACE

................................................................................................................................... 28

SOFTWARE CONTROL MODE .................................................................................. 29

DSD

AND

PCM M

ODE

S

WITCHING

................................................................................................................................ 29

PCM D

IGITAL

A

UDIO

I

NTERFACE

C

ONTROL

R

EGISTERS

.................................................................................................. 29

LRCLK P

OLARITY

........................................................................................................................................................ 30 w

PP Rev 1.3 October 2007

3

WM8741

Product Preview

BCLK / DSDCLK64 P

OLARITY

..................................................................................................................................... 30

O

VER

S

AMPLING

R

ATE

C

ONTROL

................................................................................................................................... 30

MCLK/LRCLK R

ATIO

C

ONTROL

(N

ORMAL

PCM M

ODE

) ................................................................................................. 31

8FS M

ODE

.................................................................................................................................................................. 31

MCLK/LRCLK R

ATIO

C

ONTROL

(8FS M

ODE

)................................................................................................................ 31

A

TTENUATION

C

ONTROL

............................................................................................................................................... 31

DAC O

UTPUT

A

TTENUATION

......................................................................................................................................... 32

A

TTENUATION

C

ONTROL

M

ODE

..................................................................................................................................... 32

V

OLUME

R

AMP

M

ODE

................................................................................................................................................... 33

A

NTI

-

CLIPPING

D

IGITAL

A

TTENUATION

M

ODE

.................................................................................................................. 33

DSD P

LUS

G

AIN

C

ONTROL

........................................................................................................................................... 33

M

UTE

M

ODES

.............................................................................................................................................................. 34

Z

ERO

F

LAG

O

UTPUT

.................................................................................................................................................... 35

ZFLAG F

ORCE

H

IGH

C

ONTROL

.................................................................................................................................... 35

I

NFINITE

Z

ERO

D

ETECT

................................................................................................................................................. 35

D

E

-

EMPHASIS

.............................................................................................................................................................. 36

O

UTPUT

P

HASE

R

EVERSAL

........................................................................................................................................... 36

D

IFFERENTIAL

M

ONO

M

ODE

.......................................................................................................................................... 37

D

ITHER

....................................................................................................................................................................... 37

N

ORMAL

PCM M

ODE

D

IGITAL

F

ILTER

S

ELECTION

........................................................................................................... 38

8FS M

ODE

D

IGITAL

F

ILTER

........................................................................................................................................... 38

DSD P

LUS

F

ILTER

S

ELECTION

...................................................................................................................................... 38

DSD D

IRECT

D

IGITAL

F

ILTER

........................................................................................................................................ 38

DSD M

UTE

C

ONTROL

.................................................................................................................................................. 39

P

OWER

S

AVING

S

TANDBY

C

ONTROL

............................................................................................................................. 39

HARDWARE CONTROL MODE.................................................................................. 39

DSD

AND

PCM MODE S

WITCHING

...............................................................................................................................39

A

UDIO

I

NPUT

F

ORMAT

.................................................................................................................................................. 39

O

VERSAMPLING

R

ATE

C

ONTROL

................................................................................................................................... 40

M

UTE

P

IN

.................................................................................................................................................................... 40

ZERO FLAG............................................................................................................................................................... 41

D

E

-

EMPHASIS

C

ONTROL AND

A

NTI

-

CLIPPING

M

ODE

........................................................................................................ 41

D

IGITAL

F

ILTER

S

ELECTION

........................................................................................................................................... 42

D

IFFERENTIAL

M

ONO

M

ODE

.......................................................................................................................................... 42

OVERVIEW OF FUNCTIONS...............................................................................43

REGISTER MAP...................................................................................................44

REGISTER MAP...................................................................................................44

DIGITAL FILTER CHARACTERISTICS ...............................................................49

PCM MODE FILTER CHARACTERISTICS ................................................................. 49

8FS MODE FILTER CHARACTERISTICS................................................................... 51

DSD PLUS MODE FILTER CHARACTERISTICS ....................................................... 52

DSD DIRECT MODE FILTER CHARACTERISTICS ................................................... 52

PCM MODE FILTER RESPONSES............................................................................. 53

8FS MODE FILTER RESPONSES .............................................................................. 58

DSD PLUS MODE FILTER RESPONSES................................................................... 58

DSD DIRECT MODE FILTER RESPONSES............................................................... 59

DEEMPHASIS FILTER RESPONSES ......................................................................... 60

APPLICATIONS INFORMATION .........................................................................61

PACKAGE DIMENSIONS ....................................................................................62

IMPORTANT NOTICE ..........................................................................................63

ADDRESS: .................................................................................................................. 63 w

PP Rev 1.3 October 2007

4