WM8973-EV1M
w
Rev 1.0, February 2005
2
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
WM8973 OPERATION .................................................................................. 10
SOFTWARE CONTROL....................................................................................... 10
SERIAL INTERFACE SOFTWARE DESCRIPTION...................................... 12
SOFTWARE DOWNLOAD ................................................................................... 12
SOFTWARE INSTALLATION............................................................................... 12
SOFTWARE OPERATION ................................................................................... 12
DOWER DOWN AND INTERFACE CONTROL ................................................... 16
DAC AND ADC CONTROL................................................................................... 17
VOLUME CONTROL ............................................................................................ 18
MIXER CONTROL................................................................................................ 19
TONE CONTROL ................................................................................................. 20
SCHEMATIC LAYOUT .................................................................................. 21
WM8973-EV1B PCB LAYOUT...................................................................... 29
WM8973-EV1B BILL OF MATERIAL............................................................ 33
APPENDIX .................................................................................................... 35
EXTERNAL DSP CONNECTION TO THE WM8973-EV1B .......................... 35
AUDIO INTERFACE CONNECTIONS.................................................................. 35
SOFTWARE INTERFACE .................................................................................... 37
CONNECTION DIAGRAMS.................................................................................. 37
ADDITIONAL WM8973-EV1B SETUP RECOMMENDATIONS .................... 39
ADC TO DAC LOOPBACK................................................................................... 39
CONNECTION OF AN 8
Ω
MONO SPEAKER ...................................................... 40
HEADPHONE AUTO-DETECT FUNCTION ......................................................... 43
Summary of Contents for WM8973-EV1B
Page 1: ...WM8973 EV1M Evaluation Board User Handbook Rev 1 0...
Page 3: ...WM8973 EV1M w Rev 1 0 February 2005 3 EVALUATION SUPPORT 44 IMPORTANT NOTICE 45 ADDRESS 45...
Page 21: ...WM8973 EV1M w Rev 1 0 February 2005 21 SCHEMATIC LAYOUT Figure 13 Functional Diagram...
Page 22: ...WM8973 EV1M w Rev 1 0 February 2005 22 Figure 14 Digital Input...
Page 23: ...WM8973 EV1M w Rev 1 0 February 2005 23 Figure 15 Software Control...
Page 24: ...WM8973 EV1M w Rev 1 0 February 2005 24 Figure 16 Level Shift...
Page 25: ...WM8973 EV1M w Rev 1 0 February 2005 25 Figure 17 Analogue Input...
Page 26: ...WM8973 EV1M w Rev 1 0 February 2005 26 Figure 18 WM8973...
Page 27: ...WM8973 EV1M w Rev 1 0 February 2005 27 Figure 19 Analogue Output...
Page 28: ...WM8973 EV1M w Rev 1 0 February 2005 28 Figure 20 Power...
Page 29: ...WM8973 EV1M w Rev 1 0 February 2005 29 WM8973 EV1B PCB LAYOUT Figure 21 Top Layer Silkscreen...
Page 30: ...WM8973 EV1M w Rev 1 0 February 2005 30 Figure 22 Top Layer...
Page 31: ...WM8973 EV1M w Rev 1 0 February 2005 31 Figure 23 Bottom Layer...
Page 32: ...WM8973 EV1M w Rev 1 0 February 2005 32 Figure 24 Bottom Layer Silkscreen...