Wolfson WM8973-EV1B, User Handbook Manual

Page 1: ...WM8973 EV1M Evaluation Board User Handbook Rev 1 0...

Page 2: ...E 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 SCHEM...

Page 3: ...WM8973 EV1M w Rev 1 0 February 2005 3 EVALUATION SUPPORT 44 IMPORTANT NOTICE 45 ADDRESS 45...

Page 4: ...ing items are available from Wolfson WM8973 EV1B Evaluation Board 6097_QFN32_EV1_REV1 WM8973 EV1S Control Software download from http www wolfsonmicro com WM8973 EV1M User Handbook download from http...

Page 5: ...options for inputting digital data into the WM8973 evaluation board There is a coaxial input J19 via a standard phono connector or an optical input U3 via a standard optical receiver module A direct...

Page 6: ...nalogue signal MIC Input Analogue signals applied to these connectors are AC coupled before being input to the WM8973 Table 3 Analogue Inputs Note When used in Master Mode an SPDIF signal must still b...

Page 7: ...ES Figure 1 Interfaces HEADERS H1 SIGNAL H2 SIGNAL 1 2 MCLK 12 11 GND 3 4 GND 10 9 ADCDAT 5 6 DACDAT 8 7 GND 7 8 GND 6 5 ADCLRC 9 10 DACLRC 4 3 GND 11 12 GND 2 1 BCLK 13 14 BCLK 15 16 GND J31 SIGNAL 1...

Page 8: ...4 20 VREF 5 5 BCLK 5 21 VMID 6 6 DACDAT 6 22 MICBIAS 7 7 DACLRC 7 23 RINPUT3 HPDETECT 8 8 ADCDAT 8 24 LINPUT3 J21 WM8973 PIN NAME J13 WM8973 PIN NAME 1 9 ADCLRC 1 25 RINPUT2 2 10 MONOOUT 2 26 LINPUT2...

Page 9: ...new settings after SW6 has been pressed and released SW3 DATA FORMAT 1 2 3 4 5 6 DATA FORMAT 1 0 0 1 0 0 I2S Compatible default setting 1 0 0 0 0 1 24 bit Right Justified 1 0 0 0 0 0 Left Justified SW...

Page 10: ...E MODE To operate the WM8973 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...

Page 11: ...NGG 1 0 NGAT 000000000 R21 15h 0010101 Left ADC volume LAVU LADCVOL 7 0 011000011 R22 16h 0010110 Right ADC volume RAVU RADCVOL 7 0 011000011 R23 17h 0010111 Additional control 1 TSDEN VSEL 1 0 DMONO...

Page 12: ...nload to your hard drive SOFTWARE INSTALLATION Once the zip file has been downloaded to install the software Open the zip file Double click on the setup exe file Follow the on screen installation inst...

Page 13: ...d as a quick start approach Pressing either of these buttons will power up the DAC ADC or Line signal paths in a known state as described in the following pages Important The CS8427 SPDIF decoder IC w...

Page 14: ...d 3 SHORT Line Input Select Phono Socket SW5 SW7 Pins 2 and 3 SHORT Line Input Select Phono Socket SW8 SW9 Pins 2 and 3 SHORT Line Input Select Phono Socket SW27 SW28 Pins 2 and 3 SHORT Line Output Se...

Page 15: ...ins 2 and 3 SHORT Line Input Select Phono Socket SW27 SW28 Pins 2 and 3 SHORT Line Output Select Phono Socket Table 11 ADC Setup Jumper Setup Slave Mode LINE SUBMIT SETUP By pressing the Line Setup bu...

Page 16: ...e SPI Control Mode SW1 SW2 Pins 2 and 3 SHORT Line Input Select Phono Socket SW5 SW7 Pins 2 and 3 SHORT Line Input Select Phono Socket SW8 SW9 Pins 2 and 3 SHORT Line Input Select Phono Socket SW27 SW...

Page 17: ...C 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 pane...

Page 18: ...lume 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 Once changes are made to the Volume Update...

Page 19: ...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 Sub...

Page 20: ...te in the Power Down and Interface Control panel After the 3D Select setting has been made and written to the WM8973 the ADC and DAC should be powered up Once any of the WM8973 default settings are ch...

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...

Page 33: ...Jumper Switch 0 1 Center off VERTICAL SW1 2 SW4 5 SW7 9 SW27 28 SW36 10 4mm Non Insulated Panel Socket 16A J1 2 J4 5 J8 J10 J47 7 Phono Socket PCB mount BLACK J29 J39 40 3 Phono Socket PCB mount RED...

Page 34: ...W3 1 B3F1000 SPNO PCB mount switch SW6 1 1 32mm PCB Test Terminal BLACK TP1 TP5 9 6 1 32mm PCB Test Terminal RED TP2 4 3 Unpop 1 32mm PCB Test Terminal TP10 1 TORX176 Digirtal Audio Optical Receiver U...

Page 35: ...he 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 have...

Page 36: ...The digital inputs to the WM8973 have a CMOS threshold i e Logic High min DBVDDx0 7 Logic Low max DBVDDx0 3 These are met directly by the level shift IC outputs The jumpers on H2 should also be remove...

Page 37: ...shown in Figure 30 If the DSP is running at a higher voltage e g 5V than the WM8973 the signals from the DSP platform should be connected to test points TP2 CSB TP4 SDIN and TP3 SCLK Connecting the hi...

Page 38: ...WM8973 EV1M w Rev 1 0 February 2005 38 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...

Page 39: ...to be applied to L RLINE_IN1 passed through the ADC looped into the DAC and output on the L ROUT outputs MONO OUT OUT3 LOUT2 ROUT2 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 ROUT1 LOUT1 1 Figure 32 Recommended ADC...

Page 40: ...t Select Phono Socket SW8 SW9 Pins 2 and 3 SHORT Line Input Select Phono Socket SW27 SW28 Pins 2 and 3 SHORT Line Output Select Phono Socket Table 14 Loopback Setup Jumper Settings Slave Mode SOFTWARE...

Page 41: ...E IN1 RLINE IN2 LLINE IN2 RLINE IN3 LLINE IN3 OPT _IN SPDIF_ IN SPDIF_ OUT H2 J8 5V J10 DCVDD 1 42V to 3 6V J47 HPVDD 1 8V to 3 6V J24 1 J31 1 J23 1 J20 1 J25 1 J18 1 J37 1 J34 1 J38 1 J35 1 J32 1 J33...

Page 42: ...34 and J35 SHORT OUT signals are DC coupled SW3 1 2 3 4 5 6 DATA FORMAT 1 0 0 1 0 0 I2S Compatible SW4 Pins 1 and 2 SHORT 3 wire SPI Control Mode SW1 SW2 Pins 2 and 3 SHORT Line Input Select Phono Soc...

Page 43: ...ings HARDWARE SETUP 1 Designator R50 should be populated with a 0R resistor 2 Switch SW8 should be set to the OFF centre position 3 Designator R49 should be populated with a 47K resistor 4 Connect spe...

Page 44: ...tion or require technical support please contact Wolfson Microelectronics Applications group through the following channels Email apps wolfsonmicro com Telephone Apps 44 131 272 7070 Fax 44 131 272 70...

Page 45: ...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 of the l...

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...