Product Preview
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 COMPATIBLE) SERIAL CONTROL MODE.......................................................................................................20
3-WIRE CONTROL INTERFACE DAISY CHAINING...............................................................................................................20
2-WIRE SERIAL CONTROL MODE ...................................................................................................................................22
DIGITAL AUDIO INTERFACE..................................................................................... 22
PCM MODE.................................................................................................................................................................22
PCM DIGITAL AUDIO INTERFACE...................................................................................................................................23
LEFT JUSTIFIED MODE..................................................................................................................................................23
RIGHT JUSTIFIED MODE................................................................................................................................................24
I2S MODE....................................................................................................................................................................24
DSP MODE A ..............................................................................................................................................................25
DSP MODE B ..............................................................................................................................................................25
PCM MODE SAMPLING RATES ......................................................................................................................................25
8FS MODE ..................................................................................................................................................................26
8FS MODE SAMPLING RATES .......................................................................................................................................27
AUDIO INTERFACE DAISY CHAINING...............................................................................................................................27
DSD MODE ................................................................................................................. 28
DSD DIRECT ...............................................................................................................................................................28
DSD PLUS MODE .........................................................................................................................................................28
DSD DIGITAL AUDIO INTERFACE ...................................................................................................................................28
SOFTWARE CONTROL MODE.................................................................................. 29
DSD AND PCM MODE SWITCHING ................................................................................................................................29
PCM DIGITAL AUDIO INTERFACE CONTROL REGISTERS ..................................................................................................29
LRCLK POLARITY........................................................................................................................................................30
PP Rev 1.3 October 2007
w
3
WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
