WM8750-EV1M
TABLE OF CONTENTS
TABLE OF CONTENTS ..................................................................................2
INTRODUCTION .............................................................................................4
GETTING STARTED.......................................................................................4
EVALUATION BOARD CHECKLIST ......................................................................4
CUSTOMER REQUIREMENTS..............................................................................4
POWER SUPPLIES ...............................................................................................5
BOARD FUNCTIONALITY .....................................................................................5
BOARD INPUT.......................................................................................................6
BOARD OUTPUT...................................................................................................6
INTERFACES.........................................................................................................7
HEADERS..............................................................................................................7
LINKS, JUMPERS AND SWITCHES......................................................................9
WM8750 OPERATION ..................................................................................10
SOFTWARE CONTROL.......................................................................................10
SERIAL INTERFACE SOFTWARE DESCRIPTION......................................13
SOFTWARE DOWNLOAD...................................................................................13
SOFTWARE INSTALLATION...............................................................................13
SOFTWARE OPERATION...................................................................................13
POWER DOWN AND INTERFACE CONTROL....................................................19
DAC AND ADC CONTROL...................................................................................20
VOLUME CONTROL............................................................................................21
MIXER CONTROL................................................................................................22
TONE CONTROL.................................................................................................23
SCHEMATIC LAYOUT..................................................................................24
WM8750-EV1B PCB LAYOUT......................................................................32
WM8750-EV1B BILL OF MATERIAL............................................................36
APPENDIX ....................................................................................................38
EXTERNAL DSP CONNECTION TO THE WM8750-EV1B ..........................38
AUDIO INTERFACE CONNECTIONS..................................................................38
SOFTWARE INTERFACE....................................................................................40
CONNECTION DIAGRAMS..................................................................................40
ADDITIONAL WM8750-EV1B SETUP RECOMMENDATIONS....................42
ADC TO DAC LOOPBACK...................................................................................42
CONNECTION OF AN 8Ω MONO SPEAKER ......................................................44
HEADPHONE AUTO-DETECT FUNCTION .........................................................46
Rev 2.0, February 2005
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WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
