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Wolfson WM8973-EV1B User Handbook Manual

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WM8973-EV1M
Evaluation Board User Handbook
Rev 1.0

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Summary of Contents for Wolfson WM8973-EV1B

  • Page 1 WM8973-EV1M Evaluation Board User Handbook Rev 1.0...

  • Page 2: Table Of Contents

    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...................
  • Page 3 WM8973-EV1M EVALUATION SUPPORT ................44 IMPORTANT NOTICE ................... 45 ADDRESS: ......................45 Rev 1.0, February 2005...

  • Page 4: Introduction

    WM8973. GETTING STARTED EVALUATION BOARD CHECKLIST The following items are available from Wolfson: • WM8973-EV1B Evaluation Board - 6097_QFN32_EV1_REV1 •...

  • Page 5: Power Supplies

    WM8973-EV1M POWER SUPPLIES Using appropriate power leads with 4mm connectors, power supplies should be connected as described in Table 1. REF-DES SOCKET NAME SUPPLY DBVDD +1.8V to +3.6V AVDD +1.8V to +3.6V DCVDD +1.42V to +3.6V HPVDD +1.8V to +3.6V DGND AGND Table 1 Power Supply Connections...

  • Page 6: Board Input

    WM8973-EV1M BOARD INPUT REF-DES SOCKET NAME SIGNAL SPDIF_IN Digital (AES/EBU, UEC958, S/PDIF, EIAJ CP340/1201) signal. OPTICAL_IN Digital (AES/EBU, UEC958, S/PDIF, EIAJ CP340/1201) optical signal. Table 2 Digital Inputs REF-DES SOCKET NAME SIGNAL RLINE_IN1 Analogue signal LLINE_IN1 Analogue signal RLINE_IN2 Analogue signal LLINE_IN2 Analogue signal RLINE_IN3...

  • Page 7: Interfaces

    WM8973-EV1M INTERFACES Figure 1 Interfaces HEADERS SIGNAL SIGNAL MCLK 12/11 10/9 ADCDAT DACDAT ADCLRC 9/10 DACLRC 11/12 BCLK 13/14 BCLK 15/16 SIGNAL DACLRC_OUT SIGNAL ADCLRC_IN Rev 1.0, February 2005...
  • Page 8 WM8973-EV1M WM8973 PIN NAME WM8973 PIN NAME MCLK HPVDD DCVDD AVDD DBVDD AGND DGND VREF BCLK VMID DACDAT MICBIAS DACLRC RINPUT3/HPDETECT ADCDAT LINPUT3 WM8973 PIN NAME WM8973 PIN NAME ADCLRC RINPUT2 MONOOUT LINPUT2 OUT3 RINPUT1 ROUT1 LINPUT1 LOUT1 MODE HPGND ROUT2 SDIN LOUT2...

  • Page 9: Links, Jumpers And Switches

    WM8973-EV1M LINKS, JUMPERS AND SWITCHES LINKS AND JUMPERS LINK/JUMPER STATUS DESCRIPTION J18 (BCLK) OPEN Master mode SHORT Slave mode [default setting] J20 (ADCLRC) OPEN Master mode SHORT Slave mode [default setting] J25 (DACLRC) OPEN Master mode SHORT Slave mode [default setting] OPEN Master mode SHORT...

  • Page 10: Wm8973 Operation

    WM8973-EV1M WM8973 OPERATION SOFTWARE CONTROL There are two possible serial software control modes that may be selected to operate the WM8973. The standard SPI user interface is a 3-wire solution with the second option being a 2-wire solution. 3-WIRE MODE To operate the WM8973 in SPI (3-wire) mode, jumper switch SW4 must be set so that pins 1 and 2 are SHORT.
  • Page 11 WM8973-EV1M ADDRESS REGISTER remarks Bit[8] Bit[7] Bit[6] Bit[5] Bit[4] Bit[3] Bit[2] Bit[1] Bit[0] default (Bit 15 – 9) R0 (00h) 0000000 Left Input volume LIVU LINMUTE LIZC LINVOL 010010111 R1 (01h) 0000001 Right Input volume RIVU RINMUTE RIZC RINVOL 010010111 R2 (02h) 0000010 LOUT1 volume...

  • Page 12: Serial Interface Software Description

    SOFTWARE DOWNLOAD The current evaluation board control software WM8973-EV1S should be downloaded from the Wolfson website [www.wolfsonmicro.com]. From the homepage it is recommended to carry out a search for ‘WM8973’ and select the evaluation board ’more’ button. Select ‘download’ from the top right hand corner under the software label.
  • Page 13 Pressing this button does not write to the device, it only resets the panel settings to their default state. Left clicking on the Wolfson logo will open the PCs default web browser and go to the Wolfson Microelectronics website (‘www.wolfsonmicro.com’). The DAC, ADC and Line setup buttons have also been provided as a quick start approach.
  • Page 14 WM8973-EV1M LINKS AND LINK/JUMPER STATUS DESCRIPTION JUMPERS All jumpers in place DAC clocks and data input No jumpers in place ADC clocks and data output SW36 Pins 2 and 3 SHORT Connects to GND for HP output reference J18 (BCLK) SHORT Slave mode J20 (ADCLRC)
  • Page 15 WM8973-EV1M LINKS AND LINK/JUMPER STATUS DESCRIPTION JUMPERS All jumpers in place DAC clocks and data input except for the jumper connecting pins 5 and 6 and 7 and 8. All jumpers in place ADC clocks and data output SW36 Pins 2 and 3 SHORT Connects to GND for HP output reference J18 (BCLK) SHORT...

  • Page 16: Dower Down And Interface Control

    WM8973-EV1M LINKS AND JUMPERS LINK/JUMPER STATUS DESCRIPTION No jumpers in place DAC clocks and data input No jumpers in place ADC clocks and data output SW36 Pins 2 and 3 SHORT Connects to GND for HP output reference J18 (BCLK) SHORT Slave mode J20 (ADCLRC)

  • Page 17: Dac And Adc Control

    WM8973-EV1M DAC AND ADC CONTROL Figure 9 DAC and ADC Control The DAC and ADC Control panel is used to control the many DAC and ADC related features of the WM8973. Pressing the ‘ADC and DAC Submit’ button will cause the settings shown on this panel to be written to the WM8973.

  • Page 18: Volume Control

    WM8973-EV1M VOLUME CONTROL Figure 10 Volume Control The Volume Control panel is used to control both analogue and digital volume settings of the WM8973. The volume sliders update in ‘real’ time (i.e. the ‘Volume Submit’ button does not have to be pressed to update the output volume level) but will only have an effect on the output if the Volume Update bits are set.

  • Page 19: Mixer Control

    WM8973-EV1M MIXER CONTROL Figure 11 Mixer Control The Mixer Control panel is used to control the many signal mixing options offered by the WM8973. The volume sliders update in ‘real’ time (i.e. the ‘Mixer Submit’ button does not have to be pressed to update the mixer volume level). Pressing the ‘Mixer Submit’ button will cause the settings shown on this panel to be written to the WM8973.

  • Page 20: Tone Control

    WM8973-EV1M TONE CONTROL Figure 12 Tone Control The Tone Control panel is used to control the various tone options (3D, Bass, Treble, etc) offered by the WM8973. The sliders update in ‘real’ time (i.e. the ‘Tone Submit’ button does not have to be pressed to update the relevant tone slider level). Pressing the ‘Tone Submit’ button will cause the settings shown on this panel to be written to the WM8973.

  • Page 21: Schematic Layout

    WM8973-EV1M SCHEMATIC LAYOUT Figure 13 Functional Diagram Rev 1.0, February 2005...
  • Page 22 WM8973-EV1M Figure 14 Digital Input Rev 1.0, February 2005...
  • Page 23 WM8973-EV1M Figure 15 Software Control Rev 1.0, February 2005...
  • Page 24 WM8973-EV1M Figure 16 Level Shift Rev 1.0, February 2005...
  • Page 25 WM8973-EV1M Figure 17 Analogue Input Rev 1.0, February 2005...
  • Page 26 WM8973-EV1M Figure 18 WM8973 Rev 1.0, February 2005...
  • Page 27 WM8973-EV1M Figure 19 Analogue Output Rev 1.0, February 2005...
  • Page 28 WM8973-EV1M Figure 20 Power Rev 1.0, February 2005...

  • Page 29: Wm8973-Ev1B Pcb Layout

    WM8973-EV1M WM8973-EV1B PCB LAYOUT Figure 21 Top Layer Silkscreen Rev 1.0, February 2005...
  • Page 30 WM8973-EV1M Figure 22 Top Layer Rev 1.0, February 2005...
  • Page 31 WM8973-EV1M Figure 23 Bottom Layer Rev 1.0, February 2005...
  • Page 32 WM8973-EV1M Figure 24 Bottom Layer Silkscreen Rev 1.0, February 2005...

  • Page 33: Wm8973-Ev1B Bill Of Material

    WM8973-EV1M WM8973-EV1B BILL OF MATERIAL DESCRIPTION REFERENCE QUANTITY 74ALVC164245 16 Bit Dual Supply Bus Transceiver SSO C5-6 C9 C18 C21 C23 C27 C29 10uF 6.3 Dia 2.5 pitch Oscon Through Hole Cap. 16V 20% C38 C41 C48-49 C70-71 C78 1uF 4 Dia 2 pitch Oscon Through Hole Cap. 25V 20% C35 C57 220uF 10 Dia 5 pitch Oscon Through Hole Cap.
  • Page 34 WM8973-EV1M REFERENCE QUANTITY DESCRIPTION 620R 0805 SMD chip resistor 1% 0.1W 680R 0805 SMD chip resistor 1% 0.1W 75R 0805 SMD chip resistor 1% 0.125W R2 R14 R19 R34 R37-39 R44-45 Unpopulated 0805 resistor site R49-50 R53-54 R76-77 R79 R81 DIL Switch 6-Way Rocker B3F1000 SPNO PCB mount switch 1.32mm PCB Test Terminal BLACK...

  • Page 35: Appendix

    APPENDIX EXTERNAL DSP CONNECTION TO THE WM8973-EV1B The WM8973-EV1B evaluation board has been designed to allow it to be easily connected to an external DSP platform with error free operation. The following information is provided to ease the connection process and ensure that all signals sent and received by the WM8973-EV1B are reliable and at the correct voltage levels.
  • Page 36 WM8973-EV1M ADCDAT Figure 26 Data Connection to the DSP Platform (+5V tolerant input levels) When the WM8973 is set to Master Mode, the jumpers on header H1 should be removed, disconnecting the digital input section of the evaluation board. If an external MCLK signal is being used (i.e.

  • Page 37: Software Interface

    DSP platform to the WM8973-EV1B. If the DSP supplies are set to the same voltage as the DBVDD supplies of the WM8973, a direct connection can be made to pin 6 (CSB), pin 7 (SDIN) and pin 8 (SCLK) of header strip J13 for 3-wire software mode as shown in Figure 30.
  • Page 38 WM8973-EV1M Figure 30 Full DSP Control with Equal Voltage Supplies for DSP and WM8973 Figure 31 Full DSP Control with Higher Voltage DSP Supply than WM8973 Rev 1.0, February 2005...

  • Page 39: Additional Wm8973-Ev1B Setup Recommendations

    WM8973-EV1M ADDITIONAL WM8973-EV1B SETUP RECOMMENDATIONS ADC TO DAC LOOPBACK Setting up the WM8973-EV1 in loopback mode allows an analogue signal to be applied to L/RLINE_IN1, passed through the ADC, looped into the DAC and output on the L/ROUT outputs. Figure 32 Recommended ADC to DAC Loopback Setup Note: Pin 6 of H1 MUST be linked to pin 9 of H2.

  • Page 40: Connection Of An 8Ω Mono Speaker

    WM8973-EV1M LINKS AND JUMPERS LINK/JUMPER STATUS DESCRIPTION All jumpers in place except for links DAC clocks and data input shorting pins 5 and 6 and 7 and 8. All jumpers in place except for links ADC clocks and data output shorting pins 9 and 10 and 11 and 12.
  • Page 41 WM8973-EV1M DBVDD AVDD +1.8V +1.8V DGND +3.6V +3.6V AGND PARALLEL PORT RLINE DCVDD +1.42V +3.6V LLINE RLINE - LLINE SPDIF_ RLINE SW27 SW28 SPDIF_ SW36 LLINE HPVDD +1.8V +3.6V Figure 33 Recommended Mono Speaker Connection Setup Note: LOUT2 = +ve output; ROUT2 = -ve output. Rev 1.0, February 2005...
  • Page 42 WM8973-EV1M LINKS AND LINK/JUMPER STATUS DESCRIPTION JUMPERS All jumpers in place. DAC clocks and data input No jumpers in place. ADC clocks and data output SW36 Pins 2 and 3 SHORT Connects to GND for HP output reference J18 (BCLK) SHORT Slave mode J20 (ADCLRC)

  • Page 43: Headphone Auto-Detect Function

    Figure 34 Headphone Auto Detect Setup One of the features of the WM8973 is a headphone auto-detect function. This can be enabled on the WM8973-EV1B by the making the following hardware and software settings. HARDWARE SETUP Designator R50 should be populated with a 0R resistor.

  • Page 44: Evaluation Support

    The aim of this evaluation kit is to help you to become familiar with the functionality and performance of the WM8973 CODEC. If you require more information or require technical support please contact Wolfson Microelectronics Applications group through the following channels: Email: apps@wolfsonmicro.com...

  • Page 45: W Rev 1.0, February

    WM8973-EV1M IMPORTANT NOTICE Wolfson Microelectronics plc (WM) reserve the right to make changes to their products or to discontinue any product or service without notice, and advise customers to obtain the latest version of relevant information to verify, before placing orders, that information being relied on is current.
  • Page 46 Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: Cirrus Logic WM8973L-6097-FL32-M WM8973L-6097-FL32-M-S...

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