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Wolfson WM8750-EV1M User Handbook Manual

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查询WM8750-EV1M供应商
捷多邦，专业PCB打样工厂，24小时加急出货
WM8750-EV1M
Evaluation Board User Handbook
Rev 2.0

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  • Page 1 查询WM8750-EV1M供应商 捷多邦，专业PCB打样工厂，24小时加急出货 WM8750-EV1M Evaluation Board User Handbook Rev 2.0...

  • Page 2: Table Of Contents

    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......................
  • Page 3 WM8750-EV1M EVALUATION SUPPORT ................47 IMPORTANT NOTICE ................... 48 ADDRESS: ......................48 Rev 2.0, February 2005...

  • Page 4: Introduction

    WM8750. GETTING STARTED EVALUATION BOARD CHECKLIST The following items are available from Wolfson: • WM8750-EV1B Evaluation Board - 6097_QFN32_EV1_REV1 •...

  • Page 5: Power Supplies

    WM8750-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...

  • Page 6: Board Input

    WM8750-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...

  • Page 7: Interfaces

    WM8750-EV1M INTERFACES Figure 1 Interfaces HEADERS SIGNAL SIGNAL MCLK 12/11 10/9 ADCDAT DACDAT ADCLRC DACLRC 9/10 11/12 BCLK 13/14 BCLK 15/16 SIGNAL DACLRC_OUT SIGNAL ADCLRC_IN Rev 2.0, February 2005...
  • Page 8 WM8750-EV1M WM8750 PIN NAME WM8750 PIN NAME MCLK HPVDD DCVDD AVDD DBVDD AGND DGND VREF BCLK VMID DACDAT MICBIAS DACLRC RINPUT3/HPDETECT ADCDAT LINPUT3 WM8750 PIN NAME WM8750 PIN NAME ADCLRC RINPUT2 MONOOUT LINPUT2 OUT3 RINPUT1 ROUT1 LINPUT1 LOUT1 MODE HPGND...

  • Page 9: Links, Jumpers And Switches

    WM8750-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]...

  • Page 10: Wm8750 Operation

    WM8750-EV1M WM8750 OPERATION SOFTWARE CONTROL There are two possible serial software control modes that may be selected to operate the WM8750. 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 WM8750 in SPI (3-wire) mode, jumper switch SW4 must be set so that pins 1 and 2 are SHORT.
  • Page 11 WM8750-EV1M To operate the WM8750 in 2-wire mode, jumper switch SW4 must be set so that pins 2 and 3 are SHORT. The 2-wire serial interface becomes active on pins 31(SDIN) and 32(SCLK). The serial interface on the board can be connected to a PC via the printer port or any other standard parallel port.
  • Page 12 WM8750-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...

  • Page 13: Serial Interface Software Description

    SOFTWARE DOWNLOAD The current evaluation board control software WM8750-EV1S should be downloaded from the Wolfson website [www.wolfsonmicro.com]. From the homepage it is recommended to carry out a search for ‘WM8750’ and select the evaluation board ’more’ button. Select ‘download’ from the top right hand corner under the software label.
  • Page 14 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 15 WM8750-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)
  • Page 16 WM8750-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...
  • Page 17 WM8750-EV1M LINE SUBMIT SETUP By pressing the ‘Line Setup’ button, the software writes to the device setting the L/RLINE_IN1 through the analogue path to the L/ROUT1 and L/ROUT2 outputs. As with the setups previously described, this is to ease the initial use of the WM8750 until the user becomes familiar with both device and software operation.
  • Page 18 WM8750-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)

  • Page 19: Power Down And Interface Control

    WM8750-EV1M POWER DOWN AND INTERFACE CONTROL Figure 8 Power and Interface Control The Power Down and Interface Control panel is used to enable/disable the various sections of the WM8750. It is also used to set the audio interface to the required data format.

  • Page 20: Dac And Adc Control

    WM8750-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 WM8750. Pressing the ‘ADC and DAC Submit’ button will cause the settings shown on this panel to be written to the WM8750.

  • Page 21: Volume Control

    WM8750-EV1M VOLUME CONTROL Figure 10 Volume Control The Volume Control panel is used to control both analogue and digital volume settings of the WM8750. 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 22: Mixer Control

    WM8750-EV1M MIXER CONTROL Figure 11 Mixer Control The Mixer Control panel is used to control the many signal mixing options offered by the WM8750. 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 WM8750.

  • Page 23: Tone Control

    WM8750-EV1M TONE CONTROL Figure 12 Tone Control Rev 2.0, February 2005...

  • Page 24: Schematic Layout

    WM8750-EV1M The Tone Control panel is used to control the various tone options (3D, Bass, Treble, etc) offered by the WM8750. 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’...
  • Page 25 WM8750-EV1M Figure 14 Digital Input Rev 2.0, February 2005...
  • Page 26 WM8750-EV1M Figure 15 Software Control Rev 2.0, February 2005...
  • Page 27 WM8750-EV1M Figure 16 Level Shift Rev 2.0, February 2005...
  • Page 28 WM8750-EV1M Figure 17 Analogue Input Rev 2.0, February 2005...
  • Page 29 WM8750-EV1M Figure 18 WM8750 Rev 2.0, February 2005...
  • Page 30 WM8750-EV1M Figure 19 Analogue Output Rev 2.0, February 2005...
  • Page 31 WM8750-EV1M Figure 20 Power Rev 2.0, February 2005...

  • Page 32: Wm8750-Ev1B Pcb Layout

    WM8750-EV1M WM8750-EV1B PCB LAYOUT Figure 21 Top Layer Silkscreen Rev 2.0, February 2005...
  • Page 33 WM8750-EV1M Figure 22 Top Layer Rev 2.0, February 2005...
  • Page 34 WM8750-EV1M Figure 23 Bottom Layer Rev 2.0, February 2005...
  • Page 35 WM8750-EV1M Figure 24 Bottom Layer Silkscreen Rev 2.0, February 2005...

  • Page 36: Wm8750-Ev1B Bill Of Material

    WM8750-EV1M WM8750-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 37 2:1 Ratio 96KHz SPDIF Digital Audio transformer SOIC TN0200T N- Channel MOSFET SOT23 Q1-3 WM8750L Stereo CODEC for Portable Audio QFN Table 13 WM8750-EV1M Bill of Materials Note: The audio transformer used on this board is manufactured by Scientific Conversion Inc. (www.scientificonversion.com).

  • Page 38: Appendix

    WM8750-EV1M APPENDIX EXTERNAL DSP CONNECTION TO THE WM8750-EV1B The WM8750-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 WM8750-EV1B are reliable and at the correct voltage levels.
  • Page 39 WM8750-EV1M ADCDAT Figure 26 Data Connection to the DSP Platform (+5V tolerant input levels) When the WM8750 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 40: Software Interface

    0011010 [0x34h] is required or pulled high address 0011011 [0x36h] is required. CONNECTION DIAGRAMS Software Control WM8750-EV1B Audio Interface Platform Figure 29 DSP Connection with PC Control using Wolfson Software Rev 2.0, February 2005...
  • Page 41 WM8750-EV1M Software Control WM8750-EV1B Audio Interface Platform Figure 30 Full DSP Control with Equal Voltage Supplies for DSP and WM8750 Software Control Test Points & Transistors WM8750-EV1B Audio Interface Platform Figure 31 Full DSP Control with Higher Voltage DSP Supply than WM8750...

  • Page 42: Additional Wm8750-Ev1B Setup Recommendations

    WM8750-EV1M ADDITIONAL WM8750-EV1B SETUP RECOMMENDATIONS ADC TO DAC LOOPBACK Setting up the WM8750-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. DBVDD AVDD +1.8V...
  • Page 43 WM8750-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 44: Connection Of An 8Ω Mono Speaker

    WM8750-EV1M CONNECTION OF AN 8Ω Ω Ω Ω MONO SPEAKER The WM8750-EV1 can be set up to drive an 8Ω mono speaker from the R/LOUT2 outputs. Figure 33 shows the setup required for a signal applied to the DAC signal path to be output on a speaker being driven from the phono connectors J41 and J42.
  • Page 45 WM8750-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)

  • Page 46: Headphone Auto-Detect Function

    WM8750-EV1M HEADPHONE AUTO-DETECT FUNCTION 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 SPDIF_ LLINE HPVDD +1.8V +3.6V Figure 34 Headphone Auto Detect Setup One of the features of the WM8750 is a headphone auto-detect function. This can be enabled on the WM8750-EV1B by the making the following hardware and software settings.
  • Page 47 The aim of this evaluation kit is to help you to become familiar with the functionality and performance of the WM8750 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 48 WM8750-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.

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