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Wolfson WM8778-EV1B, Руководство пользователя

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Wolfson WM8778-EV1B Скачать руководство пользователя страница 35

 

WM8778-EV1M

 

w 

Rev 1.1, February 2004 

 

35 

 

Figure 23 Bottom Layer 

Содержание WM8778-EV1B

Страница 1: ...WM8778 EV1B Evaluation Board User Handbook Rev 1 1...

Страница 2: ...HARDWARE CONTROL 9 SOFTWARE CONTROL 11 SPI INTERFACE MODE 11 TWO WIRE MODE 11 REGISTER MAP 12 SERIAL INTERFACE SOFTWARE DESCRIPTION 13 SOFTWARE DOWNLOAD 13 SOFTWARE INSTALLATION 13 SOFTWARE OPERATION...

Страница 3: ...STARTED EVALUATION KIT CHECKLIST The following items are available from Wolfson WM8778 EV1B Evaluation Board order from Wolfson WM8778 EV1S exe file for control software download from http www wolfso...

Страница 4: ...odule A direct digital input is also available via one side of a 2x8 pin header H1 The analogue input signals are applied to the evaluation board via standard phono connectors J13 AINL and J10 AINR Th...

Страница 5: ...filtering and are also AC coupled before being input to the WM8778 Table 3 Analogue Inputs Note When used in Slave Mode an SPDIF signal must still be applied to phono connector J7 This input signal i...

Страница 6: ...rfaces HEADERS H1 SIGNAL H2 SIGNAL 1 2 DACDAT 16 15 GND 3 4 GND 14 13 ADCMCLK 5 6 DACLRC 12 11 GND 7 8 GND 10 9 ADCDOUT 9 10 DACBCLK 8 7 GND 11 12 GND 6 5 ADCBCLK 13 14 DACMCLK 4 3 GND 15 16 GND 2 1 A...

Страница 7: ...4 2 AINR Table 6 Headers JUMPERS JUMPERS JUMPER STATUS DESCRIPTION J8 OPEN SHORT DAC Slave Mode Level shift direction default setting DAC Master Mode J9 BCLK OPEN SHORT Separate ADC and DAC BCLK Commo...

Страница 8: ...3 SHORT Centre Position Unfiltered Output Filtered Output default setting Output Disconnected SW7 Software Control POS 1 POS 2 POS 3 3 wire SPI Control Mode default setting Hardware Mode 2 wire Contr...

Страница 9: ...V1B into a hardware configuration for DAC slave mode playback This is to ease the initial use of the WM8778 until the user becomes familiar with the device operation For ADC or bypass configuration pl...

Страница 10: ...T 1 0 0 1 0 0 I2 S Compatible SW3 POS 1 Active anti alias input filter selected SW4 POS 1 Active anti alias input filter selected SW5 Pins 2 and 3 SHORT Filtered Output SW6 Pins 2 and 3 SHORT Filtered...

Страница 11: ...PI Serial Interface TWO WIRE MODE To operate the WM8778 in 2 wire mode switch SW7 must be set to position 3 selection of software mode will be indicated by D1 being OFF Also LNK7 should be set to shor...

Страница 12: ...1110 ZCLA R15 0Fh 0001111 ZCRA R16 10h 0010000 R17 11h 0010001 LCEN ALCZC 0 0 0 R18 12h 0010010 FDECAY R19 13h 0010011 0 0 0 0 0 NGAT R20 14h 0010100 R21 15h 0010101 LRBOTH MUTELA MUTERA 0 0 R22 16h 0...

Страница 13: ...rom the homepage it is recommended that you do a search for WM8778 and select the more button located under the EVALUATION BOARDS heading Select DOWNLOAD from the right hand side of the screen under t...

Страница 14: ...Panel SUBMIT ALL The Submit All button will submit the current panel settings within each of the four main panels to every register of the WM8778 This means changes within a number of different panels...

Страница 15: ...C will only work at a rate of 256fs This will limit the sample rates that may be set using the WM8778 unless an external source is used supplying signals directly to the relevant pins of header H1 or...

Страница 16: ...DC DAC and Output Control panel is used to control the ADC DAC and Output Mixer related features of the WM8778 Pressing the ADC DAC and Output Submit button will cause the settings shown on this panel...

Страница 17: ...pressed to update the output volume level but will only have an effect on the output if the Volume Update bits are set Once changes are made to the Volume Update bits or any other settings excluding t...

Страница 18: ...rrect limiter or ALC function selected Controls specific to ALC or limiter are dimmed and not controllable depending on the operation selected The following control sliders update in real time Maximum...

Страница 19: ...ive This is to ease the initial use of the WM8778 hardware and software until the user becomes familiar with both device and software operation PARALLEL PORT 1 2 3 4 5 6 OPEN AGND AVDD 2 7V to 5 5V DG...

Страница 20: ...J17 OPEN Output Signals are AC Coupled SW1 1 2 3 4 5 6 DATA FORMAT 1 0 0 1 0 0 I2 S Compatible SW3 POS 1 Active anti alias input filter selected SW4 POS 1 Active anti alias input filter selected SW5...

Страница 21: ...that the SPDIF_IN connection is still required to provide the necessary clocks to the WM8778 I 2 S interface in this mode PARALLEL PORT 1 2 3 4 5 6 OPEN AGND AVDD 2 7V to 5 5V DGND DVDD 2 7V to 3 6V...

Страница 22: ...J17 OPEN Output Signals are AC Coupled SW1 1 2 3 4 5 6 DATA FORMAT 1 0 0 1 0 0 I2 S Compatible SW3 POS 1 Active anti alias input filter selected SW4 POS 1 Active anti alias input filter selected SW5...

Страница 23: ...h device and software operation Note The WM8778 does not require an MCLK to operate in this mode If the ADC or DAC are used then the MCLK would be required PARALLEL PORT 1 2 3 4 5 6 OPEN AGND AVDD 2 7...

Страница 24: ...re AC Coupled SW1 1 2 3 4 5 6 DATA FORMAT 1 0 0 1 0 0 I2 S Compatible SW3 POS 1 Active anti alias input filter selected SW4 POS 1 Active anti alias input filter selected SW5 Pins 2 and 3 SHORT Filtere...

Страница 25: ...WM8778 EV1M w Rev 1 1 February 2004 25 SCHEMATIC LAYOUT Figure 13 Functional Diagram...

Страница 26: ...WM8778 EV1M w Rev 1 1 February 2004 26 Figure 14 Digital Input...

Страница 27: ...WM8778 EV1M w Rev 1 1 February 2004 27 Figure 15 Software Control...

Страница 28: ...WM8778 EV1M w Rev 1 1 February 2004 28 Figure 16 Level Shift...

Страница 29: ...WM8778 EV1M w Rev 1 1 February 2004 29 Figure 17 Analogue Input and Output Mute...

Страница 30: ...WM8778 EV1M w Rev 1 1 February 2004 30 Figure 18 WM8778...

Страница 31: ...WM8778 EV1M w Rev 1 1 February 2004 31 Figure 19 Analogue Output...

Страница 32: ...WM8778 EV1M w Rev 1 1 February 2004 32 Figure 20 Power...

Страница 33: ...WM8778 EV1M w Rev 1 1 February 2004 33 WM8778 EV1B PCB LAYOUT Figure 21 Top Layer Silkscreen...

Страница 34: ...WM8778 EV1M w Rev 1 1 February 2004 34 Figure 22 Top Layer...

Страница 35: ...WM8778 EV1M w Rev 1 1 February 2004 35 Figure 23 Bottom Layer...

Страница 36: ...WM8778 EV1M w Rev 1 1 February 2004 36 Figure 24 Bottom Layer Silkscreen...

Страница 37: ...H4 2 4mm Non Insulated Panel Socket 16A J1 J2 J3 J4 J5 J22 J23 7 Phono Socket PCB mount RED J10 J15 J20 3 Phono Socket PCB mount WHITE J13 J19 J21 3 36 way Centronics IEE488 PCB mountable Connector J1...

Страница 38: ...B mount vertical slide switch SW3 SW4 SW7 3 1 32mm PCB Test Terminal BLACK TP1 TP2 TP3 TP4 TP5 TP6 TP7 TP8 TP11 TP13 10 1 32mm PCB Test Terminal RED TP9 TP10 TP12 3 2 1 Ratio 96KHz SPDIF Digital Audio...

Страница 39: ...mode and also the configuration for independent DAC and ADC audio interface MASTER SLAVE MODE The WM8778 EV1B has the ability to configure the WM8778 for independent DAC and ADC in either master or sl...

Страница 40: ...Fit jumpers 1 2 5 6 9 10 ADC Clocks and data J8 OPEN DAC Slave Mode Level Shift Direction J9 BCLK SHORT Common BCLK from ADC J11 LRC SHORT common LRCLK from ADC J12 SHORT ADC Master Mode Level Shift D...

Страница 41: ...and the DSP and could result in damage to either or both devices In most cases the DSP supplies will be set around 3V for low power portable applications The inputs to the level shift IC 74ALVC164245...

Страница 42: ...he device Connecting the signals on the output side of the level shift IC U5 will cause drive contention between U5 and the DSP and could result in damage to either or both devices In most cases the D...

Страница 43: ...input level specifications are met SOFTWARE INTERFACE When using the WM8778 EV1B evaluation board with a DSP platform the registers may be set using the supplied software with a PC and parallel port c...

Страница 44: ...CTION DIAGRAMS WM8778 EV1B H1 Software Control Audio Interface DSP Platform H4 H3 Figure 29 DSP Connection with PC Control using Wolfson Software H1 DSP Software Control Audio Interface DSP Platform W...

Страница 45: ...to 3 6V VOUTL VOUTR OPT _IN SPDIF_ IN SPDIF_ OUT H1 J2 SW1 SW2 J1 J5 H3 J11 1 J9 1 1 J4 J3 H2 J8 1 J12 1 J14 1 J16 1 H4 SW3 5v 0 1 J22 J23 12v 12v AINL AINR UNFILT_ VOUTL UNFILT_ VOUTR 1 1 SW5 1 SW6 J...

Страница 46: ...input filter selected SW5 Pins 2 and 3 SHORT Filtered Output SW6 Pins 2 and 3 SHORT Filtered Output SW7 POS 1 Software 3 Wire Mode Selected LNK3 Pins 1 and 2 SHORT DVDD Supply for S W and mode contro...

Страница 47: ...on or require technical support please contact Wolfson Microelectronics Applications group through the following channels Email apps wolfsonmicro com Telephone Apps 44 0 131 272 7070 Fax 44 0 131 272...

Страница 48: ...pected to result in a significant injury to the user A critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure o...

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