WM8731 Wolfson Microelectronics Ltd., WM8731 Datasheet - Page 4

• Manufacturer Part Number: WM8731
• Description: WM8731 : Low Power Audio Codec With Integrated Headphone Driver
• Manufacturer: Wolfson Microelectronics Ltd.

WM8731
Advanced Information
TABLE OF FIGURES
Figure 1 System Clock Timing Requirements ............................................................................13
Figure 2 Clock Out Timing Requirements...................................................................................13
Figure 3 Master Mode Connection...............................................................................................14
Figure 4 Digital Audio Data Timing – Master Mode....................................................................14
Figure 5 Slave Mode Connection.................................................................................................15
Figure 6 Digital Audio Data Timing – Slave Mode......................................................................15
Figure 7 Program Register Input Timing - 3-Wire MPU Serial Control Mode ..........................16
Figure 8 Program Register Input Timing – 2-Wire MPU Serial Control Mode .........................17
Figure 9 Line Input Schematic .....................................................................................................19
Figure 10 Line Input Application Drawing...................................................................................20
Figure 11 Microphone Input Schematic ......................................................................................21
Figure 12 Microphone Input and Bias Application Drawing .....................................................22
Figure 13 Microphone Bias Schematic........................................................................................23
Figure 14 Multi-Bit Oversampling Sigma Delta ADC Schematic...............................................23
Figure 15 ADC Digital Filter ..........................................................................................................24
Figure 16 DAC Filter Schematic ...................................................................................................25
Figure 17 Multi-Bit Oversampling Sigma Delta Schematic .......................................................25
Figure 18 Line Output Schematic ................................................................................................26
Figure 19 Line Outputs Application Drawing..............................................................................27
Figure 20 Headphone Amplifier Schematic ................................................................................27
Figure 21 Headphone Output Application Drawing ...................................................................29
Figure 22 Signal Routing in Bypass Mode...................................................................................29
Figure 23 Side Tone Mode Schematic.........................................................................................30
Figure 24 Crystal Oscillator Application Circuit ..........................................................................32
Figure 25 Left Justified Mode........................................................................................................33
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Figure 26 I
S Mode.........................................................................................................................34
Figure 27 Right Justified Mode .....................................................................................................34
Figure 28 DSP Mode.......................................................................................................................34
Figure 29 Master Mode..................................................................................................................37
Figure 30 Slave Mode.....................................................................................................................37
Figure 31 3-Wire Serial Interface...................................................................................................43
Figure 32 2-Wire Serial Interface..................................................................................................43
Figure 33 DAC Digital Filter Frequency Response –Type 0 .......................................................52
Figure 34 DAC Digital Filter Ripple –Type 0.................................................................................52
Figure 35 DAC Digital Filter Frequency Response –Type 1 .......................................................52
Figure 36 DAC Digital Filter Ripple –Type 1.................................................................................52
Figure 37 DAC Digital Filter Frequency Response –Type 2 .......................................................52
Figure 38 DAC Digital Filter Ripple –Type 2.................................................................................52
Figure 39 DAC Digital Filter Frequency Response –Type 3 .......................................................53
Figure 40 DAC Digital Filter Ripple –Type 3.................................................................................53
Figure 41 ADC Digital Filter Frequency Response –Type 0 .......................................................53
Figure 42 ADC Digital Filter Ripple –Type 0.................................................................................53
Figure 43 ADC Digital Filter Frequency Response –Type 1 .......................................................53
Figure 44 ADC Digital Filter Ripple –Type 1.................................................................................53
Figure 45 ADC Digital Filter Frequency Response –Type 2 .......................................................54
Figure 46 ADC Digital Filter Ripple –Type 2.................................................................................54
Figure 47 ADC Digital Filter Frequency Response –Type 3 .......................................................54
Figure 48 ADC Digital Filter Ripple –Type 3.................................................................................54
Figure 49 De-Emphasis Frequency Response (32kHz)...............................................................55
Figure 50 De-Emphasis Error (32kHz) ..........................................................................................55
Figure 51 De-Emphasis Frequency Response (44.1kHz)............................................................55
Figure 52 De-Emphasis Error (44.1kHz) .......................................................................................55
Figure 53 De-Emphasis Frequency Response (48kHz)...............................................................55
Figure 54 De-Emphasis Error (48kHz) ..........................................................................................55
Figure 55 External Components Diagram ....................................................................................56
AI Rev 2.3 August 2001
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