Pre-Production
WM8850
TABLE OF CONTENTS
DESCRIPTION....................................................................................................... 1
FEATURES............................................................................................................ 1
APPLICATIONS..................................................................................................... 1
BLOCK DIAGRAM ................................................................................................ 2
TABLE OF CONTENTS......................................................................................... 3
PIN CONFIGURATION.......................................................................................... 9
ORDERING INFORMATION.................................................................................. 9
PIN DESCRIPTION.............................................................................................. 10
ABSOLUTE MAXIMUM RATINGS...................................................................... 11
RECOMMENDED OPERATING CONDITIONS................................................... 11
THERMAL PERFORMANCE............................................................................... 12
ELECTRICAL CHARACTERISTICS ................................................................... 13
TERMINOLOGY............................................................................................................. 25
SIGNAL TIMING REQUIREMENTS .................................................................... 26
INTERNAL POWER ON RESET CIRCUIT.......................................................... 27
INTRODUCTION.................................................................................................. 28
WOLFSON INTERPRETATION OF HDA SPECIFICATION.......................................... 28
DOLBY AC3 (IEC-61937) ................................................................................................................................................ 28
FLOAT32 ......................................................................................................................................................................... 28
AUDIO WIDGETS CAPABILITIES PARAMETER: DIGITAL........................................................................................... 29
LATENCY ........................................................................................................................................................................ 29
POWER STATES ............................................................................................................................................................ 29
STREAM START/STOP .................................................................................................................................................. 30
SDI STREAM ORDER..................................................................................................................................................... 30
BANDWIDTH CONFLICTS.............................................................................................................................................. 31
SOFTWARE FORMATTED (RAW) S/PDIF..................................................................................................................... 31
SOURCE SYNCHRONOUS INPUT - S/PDIF RX............................................................................................................ 31
S/PDIF TX VALIDITY FLAG ............................................................................................................................................ 32
CHANNEL NUMBERING................................................................................................................................................. 32
ILLEGAL REGISTER VALUES........................................................................................................................................ 33
RESPONSE FIELD.......................................................................................................................................................... 33
CHIP HIERARCHY......................................................................................................... 34
WIDGET DIAGRAM......................................................................................................................................................... 34
NODE LIST...................................................................................................................................................................... 35
NODE/VERB SUMMARY ................................................................................................................................................ 36
DEVICE DESCRIPTION ...................................................................................... 38
STEREO ANALOGUE LINE RECORD .......................................................................... 39
PORT-E (NID = 0CH) ...................................................................................................................................................... 39
PGA1 (NID = 0AH)........................................................................................................................................................... 40
ADC1 (NID = 02H)........................................................................................................................................................... 41
STEREO ANALOGUE MICROPHONE RECORD.......................................................... 43
PORT-B (NID = 0DH) ...................................................................................................................................................... 43
PGA2 (NID = 0BH)........................................................................................................................................................... 45
MIC1 MUX (NID = 09H)................................................................................................................................................... 46
MIC1 (NID = 03H)............................................................................................................................................................ 46
DIGITAL MICROPHONE RECORD ............................................................................... 48
PORT-D (NID = 0EH) ...................................................................................................................................................... 49
PORT-H (NID = 16H)....................................................................................................................................................... 49
MIC2 (NID = 15H)............................................................................................................................................................ 50
DIGITAL MICROPHONE INTERFACE CLOCK RATES ................................................................................................. 50
PP, April 2011, Rev 3.2
w
3
WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
