w WM9713L AC'97 Audio + Touchpanel CODEC DESCRIPTION The WM9713L is a highly integrated input/output device designed for mobile computing and communications. The chip is architected for dual CODEC operation, supporting hi-fi stereo CODEC functions via the AC link interface, and additionally supporting voice CODEC functions via a PCM type Synchronous Serial Port (SSP). A third, auxiliary DAC is provided which may be used to support generation of supervisory tones, or ring-tones at different sample rates to the main CODEC. The device can connect directly to a 4-wire or 5-wire touchpanel, mono or stereo microphones, stereo headphones and a stereo speaker, reducing total component count in the system. Cap-less connections to the headphones, speakers, and earpiece may be used, saving cost and board area. Additionally, multiple analogue input and output pins are provided for seamless integration with analogue connected wireless communication devices. All device functions are accessed and controlled through a single AC-Link interface compliant with the AC'97 standard. The 24.576MHz masterclock can be input directly or generated internally from a 13MHz (or other frequency) clock by an on-chip PLL. The PLL supports a wide range of input clock from 2.048MHz to 78.6MHz. The WM9713L operates at supply voltages from 1.8V to 3.6V. Each section of the chip can be powered down under software control to save power. The device is available in a small leadless 7x7mm QFN package, ideal for use in hand-held portable systems. FEATURES AC'97 Rev 2.2 compatible stereo CODEC - DAC SNR 94dB, THD -85dB - ADC SNR 87dB, THD -86dB - Variable Rate Audio, supports all WinCE sample rates - Tone Control, Bass Boost and 3D Enhancement On-chip 45mW headphone driver On-chip 400mW mono or stereo speaker drivers Stereo, mono or differential microphone input - Automatic Level Control (ALC) - Mic insert and mic button press detection Auxiliary mono DAC (ring tone or DC level generation) Seamless interface to wireless chipset Resistive touchpanel interface - Supports 4-wire and 5-wire panels - 12-bit resolution, INL 2 LSBs (<0.5 pixels) - X, Y and touch-pressure (Z) measurement - Pen-down detection supported in Sleep Mode 2 Additional PCM/I S interface to support voice CODEC PLL derived audio clocks. Supports input clock ranging from 2.048MHz to 78.6MHz 1.8V to 3.6V supplies (digital down to 1.62V, speaker up to 4.2V) 7x7mm 48-lead QFN package APPLICATIONS Smartphones Personal Digital Assistants (PDA) Handheld and Tablet Computers BLOCK DIAGRAM WOLFSON MICROELECTRONICS plc To receive regular email updates, sign up at http://www.wolfsonmicro.com/enews Pre-Production, November 2011, Rev 3.3 Copyright 2011 Wolfson Microelectronics plc WM9713L Pre-Production TABLE OF CONTENTS DESCRIPTION ....................................................................................................... 1 FEATURES ............................................................................................................ 1 APPLICATIONS..................................................................................................... 1 BLOCK DIAGRAM ................................................................................................ 1 TABLE OF CONTENTS ......................................................................................... 2 PIN CONFIGURATION .......................................................................................... 4 ORDERING INFORMATION .................................................................................. 4 PIN DESCRIPTION ................................................................................................ 5 ABSOLUTE MAXIMUM RATINGS ........................................................................ 6 RECOMMENDED OPERATING CONDITIONS ..................................................... 7 ELECTRICAL CHARACTERISTICS ..................................................................... 8 AUDIO OUTPUTS ............................................................................................................ 8 AUDIO INPUTS ................................................................................................................ 9 AUXILIARY MONO DAC (AUXDAC) ................................................................................ 9 PCM VOICE DAC (VXDAC) ............................................................................................. 9 TOUCHPANEL AND AUXILIARY ADC .......................................................................... 10 COMPARATORS ........................................................................................................... 10 REFERENCE VOLTAGES ............................................................................................. 10 DIGITAL INTERFACE CHARACTERISTICS ................................................................. 11 POWER CONSUMPTION .................................................................................... 11 SIGNAL TIMING REQUIREMENTS .................................................................... 12 AC97 INTERFACE TIMING............................................................................................ 12 PCM AUDIO INTERFACE TIMING - SLAVE MODE ..................................................... 16 PCM AUDIO INTERFACE TIMING - MASTER MODE ................................................. 17 DEVICE DESCRIPTION ...................................................................................... 18 INTRODUCTION ............................................................................................................ 18 AUDIO PATHS OVERVIEW ........................................................................................... 20 CLOCK GENERATION .................................................................................................. 21 CLOCK DIVISION MODES ............................................................................................ 21 PLL MODE ..................................................................................................................... 24 DIGITAL INTERFACES .................................................................................................. 27 AC97 INTERFACE ......................................................................................................... 27 PCM INTERFACE .......................................................................................................... 28 AUDIO ADCS ...................................................................................................... 33 STEREO ADC ................................................................................................................ 33 RECORD SELECTOR.................................................................................................... 34 RECORD GAIN .............................................................................................................. 35 AUTOMATIC LEVEL CONTROL.................................................................................... 37 AUDIO DACS ...................................................................................................... 40 STEREO DAC ................................................................................................................ 40 VOICE DAC .................................................................................................................... 43 AUXILIARY DAC ............................................................................................................ 44 VARIABLE RATE AUDIO / SAMPLE RATE CONVERSION .............................. 46 AUDIO INPUTS.................................................................................................... 47 LINE INPUT .................................................................................................................... 47 MICROPHONE INPUT ................................................................................................... 48 MONOIN INPUT ............................................................................................................. 54 PCBEEP INPUT ............................................................................................................. 56 DIFFERENTIAL MONO INPUT ...................................................................................... 56 w PP, Rev 3.3, November 2011 2 Pre-Production WM9713L AUDIO MIXERS ................................................................................................... 57 MIXER OVERVIEW ........................................................................................................ 57 HEADPHONE MIXERS .................................................................................................. 57 SPEAKER MIXER .......................................................................................................... 57 MONO MIXER ................................................................................................................ 58 MIXER OUTPUT INVERTERS ....................................................................................... 58 ANALOGUE AUDIO OUTPUTS .......................................................................... 59 HEADPHONE OUTPUTS - HPL AND HPR .................................................................. 59 MONO OUTPUT ............................................................................................................ 60 SPEAKER OUTPUTS - SPKL AND SPKR .................................................................... 61 AUXILIARY OUTPUTS - OUT3 AND OUT4 .................................................................. 62 THERMAL SENSOR ...................................................................................................... 63 JACK INSERTION AND AUTO-SWITCHING ................................................................ 65 DIGITAL AUDIO (S/PDIF) OUTPUT .................................................................... 68 TOUCHPANEL INTERFACE ............................................................................... 70 PRINCIPLE OF OPERATION - FOUR-WIRE TOUCHPANEL ....................................... 71 PRINCIPLE OF OPERATION - FIVE-WIRE TOUCHPANEL ......................................... 73 CONTROLLING THE TOUCHPANEL DIGITISER ......................................................... 75 ADDITIONAL FEATURES ................................................................................... 84 AUXILIARY ADC INPUTS .............................................................................................. 84 BATTERY ALARM AND ANALOGUE COMPARATORS ............................................... 85 GPIO AND INTERRUPT CONTROL .............................................................................. 88 POWER MANAGEMENT ..................................................................................... 92 INTRODUCTION ............................................................................................................ 92 AC97 CONTROL REGISTER......................................................................................... 92 EXTENDED POWERDOWN REGISTERS .................................................................... 93 ADDITIONAL POWER MANAGEMENT......................................................................... 95 POWER ON RESET (POR) ........................................................................................... 95 REGISTER MAP .................................................................................................. 96 REGISTER BITS BY ADDRESS .................................................................................... 97 APPLICATIONS INFORMATION ...................................................................... 128 RECOMMENDED EXTERNAL COMPONENTS .......................................................... 128 LINE OUTPUT .............................................................................................................. 129 AC-COUPLED HEADPHONE OUTPUT ...................................................................... 129 DC COUPLED (CAPLESS) HEADPHONE OUTPUT .................................................. 130 BTL LOUDSPEAKER OUTPUT ................................................................................... 130 COMBINED HEADSET / BTL EAR SPEAKER ............................................................ 131 COMBINED HEADSET / SINGLE-ENDED EAR SPEAKER ........................................ 131 JACK INSERT DETECTION ........................................................................................ 132 HOOKSWITCH DETECTION ....................................................................................... 132 TYPICAL OUTPUT CONFIGURATIONS ..................................................................... 133 PACKAGE DIMENSIONS .................................................................................. 136 IMPORTANT NOTICE ....................................................................................... 137 ADDRESS: ................................................................................................................... 137 REVISION HISTORY ......................................................................................... 138 w PP, Rev 3.3, November 2011 3 WM9713L Pre-Production PIN CONFIGURATION ORDERING INFORMATION DEVICE TEMPERATURE RANGE WM9713CLGEFL/V -25 to +85 C WM9713CLGEFL/RV -25 to +85 C o o PACKAGE MOISTURE SENSITIVITY LEVEL PEAK SOLDERING TEMPERATURE 48-lead QFN (Pb-free) MSL3 260 C 48-lead QFN (Pb-free, tape and reel) MSL3 260 C o o Note: Reel quantity = 2,200 w PP, Rev 3.3, November 2011 4 WM9713L Pre-Production PIN DESCRIPTION PIN NAME TYPE 1 DBVDD Supply 2 MCLKA Digital Input Master Clock A Input 3 MCLKB / GPIO6 / (ADA / MASK) Digital In/Out Master Clock B Input / GPIO6 / (ADA output / MASK input) 4 DGND1 Supply Digital Ground (return path for both DCVDD and DBVDD) 5 SDATAOUT Digital Input 6 BITCLK Digital Output 7 DGND2 Supply 8 SDATAIN Digital Output 9 DCVDD Supply 10 SYNC Digital Input 11 RESETB / GPIO7 / (PENDOWN) Digital In / Out 12 WIPER / AUX4 / GPIO8 / (S/PDIF) Analogue In / Out DESCRIPTION Digital I/O Buffer Supply Serial Data Output from Controller / Input to WM9713L Serial Interface Clock Output to Controller Digital Ground (return path for both DCVDD and DBVDD) Serial Data Input to Controller / Output from WM9713L Digital Core Supply Serial Interface Synchronisation Pulse from Controller Reset (asynchronous, active Low, resets all registers to their default) / GPIO7 / (pen down output) Top Sheet Connection for 5-wire Touchpanels / Auxiliary ADC input / GPIO8 / (S/PDIF digital audio output) Touchpanel Driver Supply 13 TPVDD Supply 14 X+/ BR Analogue Input Touchpanel Connection: X+ (Right) for 4-wire / bottom right for 5wire 15 Y+/TR Analogue Input Touchpanel Connection: Y+ (Top) for 4-wire / top right for 5-wire 16 X-/TL Analogue Input Touchpanel Connection: X- (Left) for 4-wire / top left for 5-wire 17 Y-/BL Analogue Input Touchpanel Connection: Y- (Bottom) for 4-wire / bottom left for 5wire Touchpanel Driver Ground 18 TPGND Supply 19 PCBEEP Analogue Input Line Input to analogue audio mixers, typically used for beeps 20 MONOIN Analogue Input Mono Input (RX) 21 MIC1 Analogue Input Microphone preamp A input 1 22 MICCM Analogue Input Microphone common mode input 23 LINEL Analogue Input Left Line Input 24 LINER Analogue Input Right Line Input 25 AVDD Supply Analogue Supply (audio DACs, ADCs, PGAs, mic amps, mixers) 26 AGND Supply Analogue Ground 27 VREF Analogue Output Internal Reference Voltage (buffered CAP2) 28 MICBIAS Analogue Output Bias Voltage for Microphones (buffered CAP2 1.8) 29 MIC2A / COMP1 / AUX1 Analogue Input Microphone preamp A input 2 / COMP1 input / Auxiliary ADC input 30 MIC2B / COMP2 / AUX2 Analogue Input Microphone preamp B input / COMP2 input / Auxiliary ADC input 31 MONO Analogue output Mono output driver (line or headphone) 32 CAP2 Analogue In / Out Internal Reference Voltage (normally AVDD/2, if not overdriven) 33 OUT4 Analogue Output Auxiliary output driver (speaker, line or headphone) 34 SPKGND Supply 35 SPKL Analogue Output Left speaker driver (speaker, line or headphone) 36 SPKR Analogue Output Right speaker driver (speaker, line or headphone) 37 OUT3 Analogue Output Auxiliary output driver (speaker, line or headphone) 38 SPKVDD Supply 39 HPL Analogue Output 40 HPGND Supply 41 HPR Analogue Output 42 AGND2 Supply Analogue ground, chip substrate 43 HPVDD Supply Headphone supply (feeds output buffers on pins 39 and 41) w Speaker ground (feeds output buffers on pins 33, 35, 36 and 37) Speaker supply (feeds output buffers on pins 33, 35, 36 and 37) Headphone left driver (line or headphone) Headphone ground (feeds output buffers on pins 39 and 41) Headphone right driver (line or headphone) PP, Rev 3.3, November 2011 5 WM9713L Pre-Production 44 GPIO1 / PCMCLK Digital In / Out GPIO Pin 1 / PCM interface clock 45 GPIO2 / IRQ Digital In / Out GPIO Pin 2 / IRQ (Interrupt Request) output 46 GPIO3 / PENDOWN / PCMFS Digital In / Out GPIO Pin 3 / pen down output or PCM frame signal 47 GPIO4 / ADA / MASK / PCMDAC Digital In / Out GPIO Pin 4 / ADA (ADC data available) output or Mask input / PCM input (DAC) data 48 GPIO5 / S/PDIF / PCMADC Digital In / Out GPIO Pin 5 / S/PDIF digital audio output / PCM output (ADC) data 49 GND_PADDLE Die Paddle (Note 1) Note: 1. It is recommended that the GND_PADDLE is connected to analogue ground. Refer to the "Recommended External Components" diagram and "Package Dimensions" section for further information. ABSOLUTE MAXIMUM RATINGS Absolute Maximum Ratings are stress ratings only. Permanent damage to the device may be caused by continuously operating at or beyond these limits. Device functional operating limits and guaranteed performance specifications are given under Electrical Characteristics at the test conditions specified. ESD Sensitive Device. This device is manufactured on a CMOS process. It is therefore generically susceptible to damage from excessive static voltages. Proper ESD precautions must be taken during handling and storage of this device. Wolfson tests its package types according to IPC/JEDEC J-STD-020B for Moisture Sensitivity to determine acceptable storage conditions prior to surface mount assembly. These levels are: MSL1 = unlimited floor life at <30C / 85% Relative Humidity. Not normally stored in moisture barrier bag. MSL2 = out of bag storage for 1 year at <30C / 60% Relative Humidity. Supplied in moisture barrier bag. MSL3 = out of bag storage for 168 hours at <30C / 60% Relative Humidity. Supplied in moisture barrier bag. The Moisture Sensitivity Level for each package type is specified in Ordering Information. CONDITION MIN MAX Digital supply voltages (DCVDD, DBVDD) -0.3V +3.63V Analogue supply voltages (AVDD, HPVDD, TPVDD) -0.3V +3.63V Speaker supply voltage (SPKVDD) -0.3V Touchpanel supply voltage (TPVDD) +4.2V AVDD +0.3V Voltage range digital inputs DGND -0.3V DBVDD +0.3V Voltage range analogue inputs AGND -0.3V AVDD +0.3V Voltage range touchpanel Inputs X+, X-, Y+ and Y- TPVDD +0.3V Voltage range touchpanel Inputs X+, X-, Y+ and YOperating temperature range, TA w AVDD +0.3V o -25 C o +85 C PP, Rev 3.3, November 2011 6 WM9713L Pre-Production RECOMMENDED OPERATING CONDITIONS PARAMETER SYMBOL MIN TYP MAX UNIT Digital input/output buffer supply range DBVDD 1.71 3.3 3.6 V Digital core supply range Analogue supply range Speaker supply range Digital ground Analogue ground TEST CONDITIONS DCVDD 1.71 1.8 3.6 V AVDD, HPVDD, TPVDD 1.8 3.3 3.6 V SPKVDD 1.8 3.3 4.2 V DGND1, DGND2 0 V AGND, HPGND, SPKGND, TPGND 0 V Difference AGND to DGND Note 1 -0.3 0 +0.3 V Notes: 1. AGND is normally the same as DGND1/DGND2 2. DCVDD <= DBVDD and DCVDD <= AVDD 3. DCVDD should be >=2V when using the PLL w PP, Rev 3.3, November 2011 7 WM9713L Pre-Production ELECTRICAL CHARACTERISTICS AUDIO OUTPUTS Test Conditions o DBVDD=3.3V, DCVDD = 3.3V, AVDD=HPVDD=SPKVDD =3.3V, TA = +25 C, 1kHz signal, fs = 48kHz, 24-bit audio data unless otherwise stated. PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT DAC to Line-Out (HPL/R, SPKL/R or MONO with 10k / 50pF load) Full-scale output (0dBFS) Signal to Noise Ratio AVDD = 3.3V, PGA gains set to 0dB SNR 85 1 V rms 94 dB (A-weighted) Total Harmonic Distortion Power Supply Rejection THD -3dB output -85 PSRR 100mV, 20Hz to 20kHz signal on AVDD 50 -74 dB dB Speaker Output (SPKL/SPKR with 8 bridge tied load, INV=1) Output Power at 1% THD Abs. max output power Total Harmonic Distortion Signal to Noise Ratio PO THD = 1% POmax THD PO = 200mW SNR 400 mW (rms) 500 mW (rms) -66 dB 0.05 % 90 dB (A-weighted) Stereo Speaker Output (SPKL/OUT4 and SPKR/OUT3 with 8 bridge tied load, INV=1) Output Power at 1% THD Abs. max output power Total Harmonic Distortion Signal to Noise Ratio PO THD = 1% POmax THD PO = 200mW SNR 400 mW (rms) 500 mW (rms) -66 dB 0.05 % 90 dB (A-weighted) Headphone Output (HPL/R, OUT3/4 or SPKL/SPKR with 16 or 32 load) Output Power per channel PO Total Harmonic Distortion THD Signal to Noise Ratio SNR Output power is very closely correlated with THD; see below. PO=10mW, RL=16 -80 PO=10mW, RL=32 -80 PO=20mW, RL=16 -78 PO=20mW, RL=32 -79 dB 90 dB (A-weighted) Note: 1. All THD values are valid for the output power level quoted above - for example, at HPVDD=3.3V and RL=16, THD is -80dB when output power is 10mW. Higher output power is possible, but will result in deterioration in THD. w PP, Rev 3.3, November 2011 8 WM9713L Pre-Production AUDIO INPUTS Test Conditions o DBVDD=3.3V, DCVDD = 3.3V, AVDD = 3.3V, TA = +25 C, 1kHz signal, fs = 48kHz, 24-bit audio data unless otherwise stated. PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT LINEL/R, MIC1/2A/2B, MONOIN and PCBEEP pins Full Scale Input Signal Level AVDD = 3.3V 1.0 AVDD = 1.8V 0.545 differential input mode (MS = 01) AVDD = 3.3V 0.5 differential input mode (MS = 01) AVDD = 1.8V 0.273 VINFS (0dBFS) Input Resistance RIN Vrms 0dB PGA gain 25.6 32 38.4 12dB PGA gain 10.4 13 15.6 Input Capacitance k 5 pF 87 dB Line input to ADC (LINEL, LINER, MONOIN) Signal to Noise Ratio SNR 80 (A-weighted) Total Harmonic Distortion Power Supply Rejection THD -3dBFS input -86 PSRR 20Hz to 20kHz 50 -80 dB dB SNR 20dB boost enabled 80 dB THD 20dB boost enabled -80 dB Microphone input to ADC (MIC1/2A/2B pins) Signal to Noise Ratio (A-weighted) Total Harmonic Distortion AUXILIARY MONO DAC (AUXDAC) Test Conditions o DBVDD=3.3V, DCVDD = 3.3V, AVDD = 3.3V, TA = +25 C, 1kHz signal, fs = 8kHz, 24-bit audio data unless otherwise stated. PARAMETER SYMBOL TEST CONDITIONS MIN Resolution Full scale output voltage SNR MAX UNIT 12 bits 1 Vrms 65 71 dB 50 63 dB AVDD=3.3V Signal to Noise Ratio TYP (A-weighted) Total Harmonic Distortion THD 0dBFS input PCM VOICE DAC (VXDAC) Test Conditions o DBVDD=3.3V, DCVDD = 3.3V, AVDD = 3.3V, TA = +25 C, 1kHz signal, fs = 8kHz, 24-bit audio data unless otherwise stated. PARAMETER SYMBOL TEST CONDITIONS MIN TYP Resolution 16 Sample rates 8 Full scale output voltage Signal to Noise Ratio AVDD=3.3V MAX UNIT 16 Ks/s bits 1 Vrms SNR 80 dB THD 74 dB (A-weighted) Total Harmonic Distortion w PP, Rev 3.3, November 2011 9 WM9713L Pre-Production TOUCHPANEL AND AUXILIARY ADC Test Conditions o DBVDD = 3.3V, DCVDD = 3.3V, AVDD = 3.3V, TA = +25 C, unless otherwise stated. PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT Input Pins X+, X-, Y+, Y-, WIPER/AUX4, COMP1/AUX1, COMP2/AUX2 Input Voltage AGND Input leakage current AUX pin not selected as AUX ADC input AVDD <10 ADC Resolution 12 Differential Non-Linearity Error DNL Integral Non-Linearity Error INL 0.25 V nA bits 1 LSB 2 LSB Offset Error 4 LSB Gain Error 6 LSB Power Supply Rejection PSRR 50 Channel-to-channel isolation dB 80 Throughput Rate DEL = 1111 dB 48 kHz 6 ms 63 k (zero settling time) Settling Time (programmable) MCLK = 24.576MHz 0 Switch matrix resistance Programmable Pull-up resistor RPU RPU = 000001 1 Pen down detector threshold Pressure measurement current 20 IP VDD/2 V PIL = 1 400 A PIL = 0 200 COMPARATORS Test Conditions o DBVDD = 3.3V, DCVDD = 3.3V, AVDD = 3.3V, TA = +25 C, unless otherwise stated. PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT COMP1/AUX1 and COMP2/AUX2 (pins 29, 30 - when not used as mic inputs) Input Voltage AGND Input leakage current pin not selected as AUX ADC input Comparator Input Offset AVDD <10 V nA -50 +50 mV 0 10.9 s (COMP1, COMP2 only) COMP2 delay (COMP2 only) MCLK = 24.576MHz REFERENCE VOLTAGES Test Conditions o DBVDD=3.3V, DCVDD = 3.3V, AVDD = 3.3V, TA = +25 C, 1kHz signal, fs = 48kHz, 24-bit audio data unless otherwise stated. PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT Audio ADCs, DACs, Mixers Reference Input/Output CAP2 pin 1.63 1.65 1.66 V Buffered Reference Output VREF pin 1.64 1.65 1.67 V Bias Voltage VMICBIAS 2.92 2.97 3.00 V Bias Current Source IMICBIAS 3 mA Output Noise Voltage Vn Microphone Bias w 1K to 20kHz 15 nV/Hz PP, Rev 3.3, November 2011 10 WM9713L Pre-Production DIGITAL INTERFACE CHARACTERISTICS Test Conditions o DBVDD = 3.3V, DCVDD = 3.3V, TA = +25 C, unless otherwise stated. PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT DBVDD0.3 V Digital Logic Levels (all digital input or output pins) - CMOS Levels Input HIGH level VIH Input LOW level VIL DBVDD0.7 Output HIGH level VOH source current = 2mA Output LOW level VOL sink current = 2mA V DBVDD0.9 DBVDD0.1 Clock Frequency Master clock (MCLKA pin) 24.576 MHz AC'97 bit clock (BIT_CLK pin) 12.288 MHz AC'97 sync pulse (SYNC pin) 48 kHz Notes: 1. All audio and non-audio sample rates and other timing scales proportionately with the master clock. 2. For signal timing on the AC-Link, please refer to the AC'97 specification (Revision 2.2) POWER CONSUMPTION The power consumption of the WM9713L depends on the following factors: Supply voltages: Reducing the supply voltages also reduces digital supply currents, and therefore results in significant power savings especially in the digital sections of the WM9713L. Operating mode: Significant power savings can be achieved by always disabling parts of the WM9713L that are not used (e.g. audio ADC, DAC, touchpanel digitiser). Sample rates: Running at lower sample rates will reduce power consumption significantly. The figures below are for 48kHz (unless otherwise specified), but in many scenarios it is not necessary to run at this frequency, e.g. 8kHz PCM voice call scenario uses only 11.4mW (see below). MODE DESCRIPTION AVDD DCVDD DBVDD Supply Current Supply Current Supply Current V / mA Off (lowest possible power) V / mA Total Power (mW) V / mA 3.3 0.01 3.3 0 3.3 0.005 0.05 3.3 0.014 3.3 0 3.3 0.005 0.06 Touchpanel only (waiting for pen-down) 3.3 0.042 3.3 0 3.3 0.005 0.15 PCM Voice call (fs=8kHz) 2.8 2.37 2.8 1.7 2.8 0.006 11.4 Record from mono microphone 3.3 3.644 3.3 10.973 3.3 2.974 58.05 Stereo DAC Playback (AC link to headphone) 3.3 3.733 3.3 3.3 2.789 53.60 Stereo DAC Playback (AC link to headphone) 3.3 4.801 3.3 10.504 3.3 2.814 59.79 Clocks stopped. This is the default configuration after power-up. LPS (Low Power Standby) VREF maintained using 1MOhm string 9.720 PLL running with 13MHz input to MCLKB Maximum Power - everything on 3.3 13.656 3.3 15.472 3.3 2.938 105.82 Table 1 Supply Current Consumption Notes: 1. Unless otherwise specified, all figures are at TA = +25C, audio sample rate fs = 48kHz, with zero signal (quiescent), and voltage references settled. 2. The power dissipated in the headphone, speaker and touchpanel is not included in the above table. w PP, Rev 3.3, November 2011 11 WM9713L Pre-Production SIGNAL TIMING REQUIREMENTS AC97 INTERFACE TIMING CLOCK SPECIFICATIONS tCLK_HIGH tCLK_LOW BITCLK tCLK_PERIOD tSYNC_HIGH tSYNC_LOW SYNC tSYNC_PERIOD Figure 1 Clock Specifications (50pF External Load) Test Conditions DBVDD = 3.3V, DCVDD = 3.3V, DGND1 = DGND2 = 0V, TA = -25C to +85C, unless otherwise stated. PARAMETER SYMBOL MIN BITCLK frequency BITCLK period TYP MAX 12.288 MHz 81.4 tCLK_PERIOD BITCLK output jitter ns 750 ps ns BITCLK high pulse width (Note 1) tCLK_HIGH 36 40.7 45 BITCLK low pulse width (Note 1) tCLK_LOW 36 40.7 45 SYNC frequency 48 UNIT ns kHz tSYNC_PERIOD 20.8 s SYNC high pulse width tSYNC_HIGH 1.3 s SYNC low pulse width tSYNC_LOW 19.5 s SYNC period Note: 1. w Worst case duty cycle restricted to 45/55 PP, Rev 3.3, November 2011 12 WM9713L Pre-Production DATA SETUP AND HOLD Figure 2 Data Setup and Hold (50pF External Load) Note: Setup and hold times for SDATAIN are with respect to the AC'97 controller, not the WM9713L. Test Conditions DBVDD = 3.3V, DCVDD = 3.3V, DGND1 = DGND2 = 0V, TA = -25C to +85C, unless otherwise stated. PARAMETER SYMBOL MIN TYP MAX UNIT Setup to falling edge of BITCLK tSETUP 10 Hold from falling edge of BITCLK tHOLD 10 Output valid delay from rising edge of BITCLK w tCO ns ns 15 ns PP, Rev 3.3, November 2011 13 WM9713L Pre-Production SIGNAL RISE AND FALL TIMES triseCLK tfallCLK BITCLK triseSYNC tfallSYNC SYNC triseDIN tfallDIN triseDOUT tfallDOUT SDATAIN SDATAOUT Figure 3 Signal Rise and Fall Times (50pF External Load) Test Conditions DBVDD = 3.3V, DCVDD = 3.3V, DGND1 = DGND2 = 0V, TA = -25C to +85C, unless otherwise stated. PARAMETER SYMBOL MIN TYP MAX UNIT BITCLK rise time triseCLK 2 6 ns BITCLK fall time tfallCLK 2 SYNC rise time triseSYNC SYNC fall time tfallSYNC SDATAIN rise time triseDIN 2 6 ns SDATAIN fall time tfallDIN 2 6 ns 6 ns 6 ns 6 ns SDATAOUT rise time triseDOUT 6 ns SDATAOUT fall time tfallDOUT 6 ns AC-LINK POWERDOWN SLOT 1 SLOT 2 SYNC BITCLK SDATAOUT WRITE TO 0X20 DATA PR4 DON'T CARE tS2_PDOWN SDATAIN Figure 4 AC-Link Powerdown Timing AC-Link powerdown occurs when PR4 (register 26h, bit 12) is set (see "Power Management" section). PARAMETER End of Slot 2 to BITCLK and SDATAIN low w SYMBOL tS2_PDOWN MIN TYP MAX UNIT 1.0 s PP, Rev 3.3, November 2011 14 WM9713L Pre-Production COLD RESET (ASYNCHRONOUS, RESETS REGISTER SETTINGS) Figure 5 Cold Reset Timing Note: For correct operation SDATAOUT and SYNC must be held LOW for entire RESETB active low period otherwise the device may enter test mode. See AC'97 specification or Wolfson applications note WAN104 for more details. PARAMETER RESETB active low pulse width SYMBOL MIN tRST_LOW 1.0 TYP MAX UNIT s WARM RESET (ASYNCHRONOUS, PRESERVES REGISTER SETTINGS) Figure 6 Warm Reset Timing PARAMETER SYNC active high pulse width SYNC inactive to BITCLK startup delay w SYMBOL MIN tRST2CLK TYP 1.3 tSYNC_HIGH 162.4 MAX UNIT s ns PP, Rev 3.3, November 2011 15 WM9713L Pre-Production PCM AUDIO INTERFACE TIMING - SLAVE MODE Figure 7 Digital Audio Data Timing - Slave Mode Test Conditions DBVDD = 3.3V, DCVDD = 3.3V, DGND1 = DGND2 = 0V, TA = -25C to +85C, unless otherwise stated. PARAMETER SYMBOL MIN TYP MAX UNIT Audio Data Input Timing Information PCMCLK cycle time tPCMY 50 ns PCMCLK pulse width high tPCMH 20 ns PCMCLK pulse width low tPCML 20 ns PCMFS set-up time to PCMCLK rising edge tFSSU 10 ns PCMFS hold time from PCMCLK rising edge tFSH 10 ns PCMDAC set-up time from PCMCLK rising edge tDS 10 ns PCMDAC hold time from PCMCLK rising edge tDH 10 ns PCMADC propagation delay from PCMCLK falling edge tDD 10 ns Note: 1. PCMCLK period should always be greater than or equal to Voice CLK period. w PP, Rev 3.3, November 2011 16 WM9713L Pre-Production PCM AUDIO INTERFACE TIMING - MASTER MODE Figure 8 Digital Audio Data Timing - Master Mode (see Control Interface) Test Conditions DBVDD = 3.3V, DCVDD = 3.3V, DGND1 = DGND2 = 0V, TA = -25C to +85C, unless otherwise stated. PARAMETER SYMBOL MIN TYP MAX UNIT Audio Data Input Timing Information PCMFS propagation delay from PCMCLK falling edge tDL 10 ns PCMADC propagation delay from PCMCLK falling edge tDDA 10 ns PCMDAC setup time to PCMCLK rising edge tDST 10 ns PCMDAC hold time from PCMCLK rising edge tDHT 10 ns w PP, Rev 3.3, November 2011 17 WM9713L Pre-Production DEVICE DESCRIPTION INTRODUCTION The WM9713L is a largely pin compatible upgrade to WM9712, with a PCM voice CODEC added. This CODEC is interfaced via a PCM type audio interface which makes use of GPIO pins for connection. It is designed to meet the mixed-signal requirements of portable and wireless smartphone systems. It includes audio recording and playback, touchpanel digitisation, battery monitoring, auxiliary ADC and GPIO functions, all controlled through a single 5-wire AC-Link interface. Additionally, PCM voice CODEC functions are supported through provision of an additional voice DAC and a PCM audio serial interface. A PLL is included to allow unrelated reference clocks to be used for generation of the AC link system clock. Typically 13MHz or 2.048MHz clock sources might be used as a reference. SOFTWARE SUPPORT The basic audio features of the WM9713L are software compatible with standard AC'97 device drivers. However, to better support the touchpanel and other additional functions, Wolfson Microelectronics supplies custom device drivers for selected CPUs and operating systems. Please contact your local Wolfson Sales Office for more information. AC'97 COMPATIBILITY The WM9713L uses an AC'97 interface to communicate with a microprocessor or controller. The audio and GPIO functions are largely compliant with AC'97 Revision 2.2. The following differences from the AC'97 standard are noted: Pinout: The function of some pins has been changed to support device specific features. The PHONE and PCBEEP pins have been moved to different locations on the device package. Package: The default package for the WM9713L is a 77mm leadless QFN package. Audio mixing: The WM9713L handles all the audio functions of a smartphone, including audio playback, voice recording, phone calls, phone call recording, ring tones, as well as simultaneous use of these features. The AC'97 mixer architecture does not fully support this. The WM9713L therefore uses a modified AC'97 mixer architecture with three separate mixers. Tone Control, Bass Boost and 3D Enhancement: These functions are implemented in the digital domain and therefore affect only signals being played through the audio DACs, not all output signals as stipulated in AC'97. Some other functions are additional to AC'97: w On-chip BTL loudspeaker driver for mono or stereo speakers On-chip BTL driver for ear speaker (phone receiver) Auxiliary mono DAC for ring tones, system alerts etc. Touchpanel controller Auxiliary ADC Inputs 2 Analogue Comparators for Battery Alarm Programmable Filter Characteristics for Tone Control and 3D Enhancement PCM interface to additional Voice DAC and existing audio ADCs PLL to create AC'97 system clock from unrelated reference clock input PP, Rev 3.3, November 2011 18 WM9713L Pre-Production PCM CODEC The PCM voice CODEC functions typically required by mobile telephony devices are provided by an extra voice DAC on the WM9713L, which is interfaced via a standard PCM type data interface, which is constructed through optional use of 4 of the GPIO pins on WM9713L. The audio output data from one or both of the audio ADCs can also be output over this PCM interface, allowing a full voice CODEC function to be implemented. This PCM interface supports sample rates from 8 to 48ks/s using the standard AC'97 master clock. w PP, Rev 3.3, November 2011 19 WM9713L Pre-Production AUDIO PATHS OVERVIEW WM9713 Analogue Tone and 3D 1Eh / 20h / 40h:13 (3DE) ADC Left 18 Bit DACL slot 3 INV2 INV1 SPKMIX MONOMIX HPMIXR HPMIXL VXDAC AUXDAC RECMUXR RECMUXL MIC2 MICA PCBEEP MONOIN LINER LINEL DACL 0Ch:12-8 00000 = +12dB 11111 = -34.5dB 40h:7 (Loopback) AC'97 Link DACR Note: all PGAs and summers are inverting DACL 0C 1Eh:15-13 LINEL MICB 08h:12-8 00000 = +12dB 11111 = -34.5dB RECMUXL MONOIN RECMUXR AUXDAC VXDAC 16 6dB -> -15dB 6dB -> -15dB 6dB -> -15dB 6dB -> -15dB 6dB -> -15dB Headphone Mixer L 04h:12-8 00000 = 0dB 11111 = -46.5dB 10h:4-0 HPMIXL 1 15-1 14h: 1 5-1 h:1 2 14 5-1 h:1 2 1A 5-1 h:1 18 HPL Vmid Zero-cross detect 04h:14 (ZC) 04h:15 (MUTE) 6dB -> -15dB 16 Bit PCM VXDAC 02h:12-8 00000 = 0dB 11111 = -46.5dB SPKMIX VXDAC AUXDAC RECMUXR RECMUXL MICB MICA PCBEEP MONOIN LINER LINEL DACR HPMIXL DACL PCM Link 6dB -> -15dB 1Ch:7-6 LINEL MICA 1Ch:13-11 PCBEEP MONOIN MICB MICA LINER LINEL PCBEEP 0A h:1 08 5 h:1 5 h:1 5-1 2 10h: 4-0 5 h:1 MONOIN 0Ah:12-8 00000 = +12dB 11111 = -34.5dB INV1 DACL SPKL DACR 0C 1Ch:15-14 INV1 MONO Zero-cross detect Vmid 6dB -> -15dB 08h:6 (ZC) 08h:7 (MUTE) INV2 INV1 SPKMIX HPMIXL 6dB -> -15dB VXDAC AUXDAC RECMUXR RECMUXL MICB MICA PCBEEP MONOIN LINER LINEL DACR DACL PCBEEP MONOIN MICB MICA LINER LINEL VXDAC 0dB / 20dB 08h:4-0 00000 = 0dB 11111 = -46.5dB MONOMIX +5 10h:6 0-8 h:1 14 0-8 h:1 14 :7-4 h A 1 MONOMIX AUXDAC 0dB / 20dB 10h:7+5 HPMIXR RECMUXR 0dB / 20dB h:7 RECMUXL 0Eh:12-8 00000 = +12dB 11111 = -34.5dB 0dB / 20dB 02h:14 (ZC) 02h:15 (MUTE) MONO Mixer 18 PCBEEP MICB 6dB -> -15dB -4 LINER MICA 0C h:1 0A 3 h:1 3 0A h:1 3 16h7 :4 3 h:1 LINEL PCBEEP Zero-cross detect Vmid 06h:4-0 00000 = 0dB 11111 = -46.5dB 12h:14 (GRL=0) 12h:11:8 0000 = 0db 1111 = +22.5dB 12h:14 (GRL=1) 12h:13-8 11111 = +30dB 00000 = -17.25dB OUT3 1Ch:3-2 Vmid Zero-cross detect 06h:6 (ZC) 06h:7 (MUTE) 14h:6 0 = 0dB 1 = 20dB 18 Bit ADC Variable Slot 5C:1-0 (ASS) 5C:3 (HPF) 5C:4 (ADCO) Sent to Both 06h:12-8 00000 = 0dB 11111 = -46.5dB PCM Link AC'97 Link INV2 OUT4 1Ch:1-0 14h:5-3 INV1 ALC:5Ch/60h/62h Vmid Zero-cross detect ADC Right 18 Bit DACR slot 3 INV2 INV1 SPKMIX MONOMIX HPMIXR HPMIXL VXDAC AUXDAC RECMUXR RECMUXL MICB MICA PCBEEP MONOIN LINER LINEL DACR Tone and 3D 1Eh / 20h / 40h:13 (3DE) AC'97 Link DACL PCBEEP MONOIN MICB MICA LINER LINEL 06h:14 (ZC) 06h:15 (MUTE) 0Ch:4-0 00000 = +12dB 11111 = -34.5dB 40h:7 (Loopback) DACR LINER 0C 5 MICA MICB RECMUXL RECMUXR AUXDAC VXDAC Vmid 6dB -> -15dB 6dB -> -15dB 6dB -> -15dB DACR 6dB -> -15dB 6dB -> -15dB INV2 INV1 VXDAC AUXDAC RECMUXR RECMUXL MICB MICA PCBEEP MONOIN LINER LINEL 1Ch:10-8 11-8 16h: 1-8 h:1 1A 1-8 h:1 18 6dB -> -15dB 1Eh:12-10 18 Bit ADC Variable Slot 5C:1-0 (ASS) 5C:3 (HPF) 5C:4 (ADCO) DACR DACL 14h:6 0 = 0dB 1 = 20dB SPKR Zero-cross detect 02h:6 (ZC) 02h:7 (MUTE) HPMIXL 14h:2-0 PCBEEP MONOIN MICB VXDAC Vmid SPKMIX MICCM 12h:6 (GRR=0) 12h:3:0 0000 = 0db 1111 = +22.5dB 12h:6 (GRR=1) 12h:5-0 11111 = +30dB 00000 = -17.25dB 02h:4-0 00000 = 0dB 11111 = -46.5dB Speaker Mixer MONOMIX AUXDAC MICA 04h:6 (ZC) 04h:7 (MUTE) HPMIXR PCBEEP HPR Zero-cross detect 08h:14 MONOIN 0Eh:4-0 00000 = +12dB 11111 = -34.5dB LINER Vmid INV2 0A h:1 0A 4 h1 4 0C h:1 4 0Ch: 14 Vmid LINEL HPMIXR LINEL DACL 22h:9-8 00 = +12dB 11 = +30dB 04h:4-0 00000 = 0dB 11111 = -46.5dB 10h:4-0 1 15-1 14h: 1 5-1 h:1 2 14 -1 :15 2 h 1A 5-1 h:1 18 6dB -> -15dB LINER MIC2A MIC2B Headphone Mixer R SPKMIX VXDAC AUXDAC RECMUXR RECMUXL MICB MICA PCBEEP MONOIN LINER 22h:11-10 00 = +12dB 11 = +30dB LINEL 22h: 13-12 6dB -> -15dB HPMIXR DACL Vmid 16 6dB -> -15dB 12 Bit Resistor string DAC 2Eh/64h DACR AC'97 Link 6dB -> -15dB 1Ch:5-4 PCBEEP LINER MIC1 0A h:1 5 08 h:1 5 h:1 5-1 2 10h:4 -0 h:1 MONOIN 0Ah:4-0 00000 = +12dB 11111 = -34.5dB Sent to Both PCM Link AC'97 Link INV2 INV1 HPMIXL SPKMIX HPMIXR MONOMIX PCBEEP MONOIN MICB MICA LINEL LINER ALC:5Ch/60h/62h PR Bit Code PR0 - Audio ADCs & record mux PR1 - Stereo DAC PR2 - Input PGAs & mixers PR3 - Refs, input PGAs, mixers & output PGAs PR6 - Output PGAs Note: PR bits are active low - i.e. 0 = "ON"; 1 = "OFF" => Enable when { (PR0 || PR2) && PR3 } are low VMICBIAS AVDD AGND CAP VREF Figure 9 Audio Paths Overview w PP, Rev 3.3, November 2011 20 WM9713L Pre-Production CLOCK GENERATION WM9713L supports clocking from 2 separate sources, which can be selected via the AC'97 interface: External clock input MCLKA External clock input MCLKB The source clock is divided to appropriate frequencies in order to run the AC'97 interface, PCM interface, voice DAC and hi-fi DSP by means of a programmable divider block. Clock rates may be changed during operation via the AC'97 link in order to support alternative modes, for example low power mode when voice data is being transmitted only. A PLL is present to add flexibility in selection of input clock frequencies, typical choices being 2.048MHz, 4.096MHz or 13MHz. INITIALISING THE AC'97 LINK By default, the AC'97 link is disabled and therefore will not be running after power on or a COLD reset event. Before any register map configuration can begin, it is necessary to start the AC'97 link. This is achieved by sending a WARM reset to the CODEC as defined in Figure 6. Default mode on power-up also assumes a clock will be present on MCLKA with the PLL powered down. After a WARM reset the CODEC will start the AC'97 link using MCLKA as a reference. This enables data to be clocked via the AC'97 link to define the desired clock divider mode and whether PLL needs to be activated. Note: MCLKA can be any available frequency. When muxing between MCLKA and MCLKB both clocks must be active for at least two clock cycles after the switching event. CLOCK DIVISION MODES Figure 10 shows the clocking strategy for WM9713L. Clocking is controlled by CLK_MUX, CLK_SRC and S[6:0]. CLKAX2, CLKBX2 - clock doublers on inputs MCLKA and MCLKB. CLK_MUX - selects between MCLKA and MCLKB. CLK_SRC - selects between external or PLL derived clock reference. S[3:0] - sets the voice DAC clock rate and PCM interface clock when in master mode (division ratio 1 to 16 available). S[6:4] - sets the hi-fi clocking rate (division ratio 1 to 8 available). The registers used to set these switches can be accessed from register address 44h (see Table 3). If a mode change requires switching from an external clock to a PLL generated clock then it is recommended to set the clock division ratios required for the PLL clock scheme prior to switching between clocks. This option is accommodated by means of two sets of registers. SPLL[6:0] is used to set the divide ratio of the clock when in PLL mode and SEXT[6:0] is used to divide the clock when it is derived from an external source. If the PLL is selected (CLK_SRC = 0), S[6:0] = SPLL[6:0]. SPLL[6:0] is defined in register 46h (see Table 4) and is written to using the page address mode. More details on page address mode for controlling the PLL are found on page 20. Register 46h also contains a number of separate control bits relating to the PLL's function. If an external clock is selected (CLK_SRC = 1) S[6:0] = SEXT[6:0]. SEXT[6:0] is defined in register address 44h. Writing to registers 44h and 46h enables pre-programming of the required clock mode before the PLL output is selected. w PP, Rev 3.3, November 2011 21 WM9713L Pre-Production Figure 10 Clocking Architecture for WM9713L INTERNAL CLOCK FREQUENCIES The internal clock frequencies are defined as follows (refer to Figure 10): AC97 CLK - nominally 24.576MHz, used to generate AC97 BITCLK at 12.288MHz HIFI CLK - for hi-fi playback at 48ks/s HIFI CLK = 24.576MHz. See Table 2 for voice only playback. Voice DAC CLK - see Table 2 for sample rate vs clock frequency. SAMPLE RATE VOICE DAC CLK FREQUENCY HIFI CLK FREQUENCY 8ks/s voice and hi-fi 2.048MHz 24.576MHz 8ks/s voice only (power save) 2.048MHz 4.096MHz 16ks/s voice and hi-fi 4.096MHz 24.576MHz 16ks/s voice only (power save) 4.096MHz 8.192MHz 32ks/s voice and hi-fi 8.192MHz 24.576MHz 48ks/s voice and hi-fi 12.288MHz 24.576MHz Table 2 Clock Division Mode Table AUXADC The clock for the AUXADC nominally runs at 768kHz and is derived from BITCLK. The divisor for the clock generator is set by PENDIV. This enables the AUXADC clock frequency to be set according to power consumption and conversion rate considerations. w PP, Rev 3.3, November 2011 22 WM9713L Pre-Production Clock mode and division ratios are controlled by register 44h as shown in Table 3. REGISTER ADDRESS 44h BIT LABEL 14:12 SEXT[6:4] DEFAULT 000 (div 1) DESCRIPTION Hi-fi Block Clock Division Control 000 = f 001 = f/2 ... 111 = f/8 11:8 SEXT[3:0] 0000 (div 1) Voice DAC Clock Division Control 0000 = f 0001 = f/2 ... 1111 = f/16 7 CLKSRC 1 (ext clk) AC97 CLK Source Control 1 = External clock 0 = PLL clock 5:3 PENDIV 000 (div 16) AUXADC Clock Division Control 000 = f/16 001 = f/12 010 = f/8 011 = f/6 100 = f/4 101 = f/3 110 = f/2 111 = f 2 CLKBX2 0 (Off) MCLKB Multiplier Control 0 = Normal 1 = Multiply by 2 1 CLKAX2 0 (Off) MCLKA Multiplier Control 0 = Normal 1 = Multiply by 2 0 CLKMUX 0 (MCLKA) External Clock Source Control 0 = Use MCLKA 1 = Use MCLKB Note: On power-up clock must be present on MCLKA and must be active for 2 clock cycles after switching to MCLKB Table 3 Clock Muxing and Division Control w PP, Rev 3.3, November 2011 23 WM9713L Pre-Production PLL MODE The PLL operation is controlled by register 46h (see Table 4) and has two modes of operation: Integer N Fractional N The PLL has been optimized for nominal input clock (PLL_IN) frequencies in the range 8.192MHz - 19.661MHz (LF=0) and 2.048MHz - 4.9152MHz (LF=1). Through use of a clock divider (div by 2 / 4) on the input to the PLL frequencies up to 78.6MHz can be accommodated. The input clock divider is enabled by DIVSEL (0=Off) and the division ratio is set by DIVCTL (0=div2, 1=div4). Figure 11 PLL Architecture REGISTER ADDRESS 46h BIT 15:12 LABEL N[3:0] DEFAULT 0000 DESCRIPTION PLL N Divide Control 0000 = Divide by 1 0001 = Divide by 1 0010 = Divide by 2 ... 1111 = Divide by 15 Note: must be set between 05h and 0Ch for integer N mode 11 LF 0 = off PLL Low Frequency Input Control 1 = Low frequency mode (input clock < 8.192MHz) 0 = Normal mode 10 SDM 0 = off PLL SDM Enable Control 1 = Enable SDM (required for fractional N mode) 0 = Disable SDM 9 DIVSEL 0 = off PLL Input Clock Division Control 0 = Divide by 1 1 = Divide according to DIVCTL 8 DIVCTL 0 PLL Input Clock Division Value Control 0 = Divide by 2 1 = Divide by 4 6:4 PGADDR 000 Pager Address Pager address bits to access programming of K[21:0] and SPLL[6:0] 3:0 PGDATA 0000 Pager Data Pager data bits Table 4 PLL Clock Control w PP, Rev 3.3, November 2011 24 WM9713L Pre-Production INTEGER N MODE The nominal output frequency of the PLL (PLL_OUT) is 98.304MHz which is divided by 4 to achieve a nominal system clock of 24.576MHz. The integer division ratio (N) is determined by: FPLL_out / FPLL_IN , and is set by N[3:0] and must be in the range 5 to 12 for integer N operation (0101 = div by 5, 1100 = div by 12). Note that setting LF=1 enables a further division by 4 required for input frequencies in the range 2.048MHz - 4.096MHz. Integer N mode is selected by setting SDM=0. FRACTIONAL N MODE Fractional N mode provides a divide resolution of 1/2 22 and is set by K[21:0] (register 46h, see section). The relationship between the required division X, the fractional division K[21:0] and the integer division N[3:0] is: K 2 22 X N where 0 < (X - N) < 1 and K is rounded to the nearest whole number. For example, if the PLL_IN clock is 13MHz and the desired PLL_OUT clock is 98.304MHz then the desired division, X, is 7.5618. So N[3:0] will be 7h and K[21:0] will be 23F488h to produce the desired 98.304MHz clock (see Table 5). INPUT CLOCK (PLL_IN) DESIRED PLL OUTPUT (PLL_OUT) DIVISION REQUIRED (X) FRACTIONAL DIVISION (K) INTEGER DIVISION (N) 0 12x4* 2.048MHz 98.304MHz 48 4.096MHz 98.304MHz 24 0 6x4* 98.304MHz 8 0 8 13MHz 98.304MHz 7.5618 0.5618 7 27MHz (13.5MHz)** 98.304MHz 7.2818 0.2818 7 12.288MHz *Divide by 4 enabled in PLL feedback path for low frequency inputs. (LF = 1) **Divide by 2 enabled at PLL input for frequencies > 14.4MHz > 38MHz (DIVSEL = 1, DIVCTL = 0) Table 5 PLL Modes of Operation w PP, Rev 3.3, November 2011 25 WM9713L Pre-Production PLL REGISTER PAGE ADDRESS MAPPING The clock division control bits SPLL[6:0] and the PLL fractional N division bits are accessed through register 46h using a sub-page address system. The 3 bit pager address allows 8 blocks of 4 bit data words to be accessed whilst the register address is set to 46h. This means that when register address 46h is selected a further 7 cycles of programming are required to set all of the page data bits. Control bit allocation for these page addresses is described in Table 6. PAGE ADDRESS BIT LABEL DEFAULT DESCRIPTION 111 31:28 SPLL[6:4] 0h 110 27:24 SPLL[3:0] 0h 101 23:22 Reserved 0h Reserved bits 21:20 K[21:0] 0h Sigma Delta Modulator control word for fractional N division. Division resolution is 2 1/22 100 19:16 0h 011 15:12 0h 010 11:8 0h 001 7:4 0h 000 3:0 0h Clock division control bus SPLL[6:0]. Clock divider reads this control word if PLL is enabled. Bits [6:4] and [3:0] have the same functionality as 44h [14:12] and [11:8] respectively Table 6 Pager Control Bit Allocation Powerdown for the PLL and internal clocks is via registers 26h and 3Ch (see Table 7). REGISTER ADDRESS 26h BIT 13 LABEL PR5 DEFAULT 1 (Off) DESCRIPTION Internal Clock Disable Control 1 = Disabled 0 = Enabled 3Ch 9 PLL 1 (Off) PLL Disable Control 1 = Disabled 0 = Enabled N.B. both PR5 and PLL must be asserted low before PLL is enabled Table 7 PLL Powerdown Control w PP, Rev 3.3, November 2011 26 WM9713L Pre-Production DIGITAL INTERFACES The WM9713L has two interfaces, a data and control AC'97 interface and a data only PCM interface. The AC'97 interface is available through dedicated pins (SDATAOUT, SDATAIN, SYNC, BITCLK and RESETB) and is the sole control interface with access to all data streams on the device except for the Voice DAC. The PCM interface is available through the GPIO pins (PCMCLK, PCMFS, PCMDAC and PCMADC) and provides access to the Voice DAC. It can also transmit the data from the Stereo ADC. This can be useful, for example, to allow both sides of a phone conversation to be recorded by mixing the transmit and receive paths on one of the ADC channels and transmitting it over the PCM interface. AC97 INTERFACE INTERFACE PROTOCOL The WM9713L uses an AC'97 interface for both data transfer and control. The AC-Link has 5 wires: SDATAIN (pin 8) carries data from the WM9713L to the controller SDATAOUT (pin 5) carries data from the controller to the WM9713L BITCLK (pin 6) is a clock, derived from either MCLKA or MCLKB inputs and supplied to the controller. SYNC is a synchronization signal generated by the controller and passed to the WM9713L RESETB resets the WM9713L to its default state Figure 12 AC-Link Interface (typical case with BITCLK generated by the AC97 CODEC) The SDATAIN and SDATAOUT signals each carry 13 time-division multiplexed data streams (slots 0 to 12). A complete sequence of slots 0 to 12 is referred to as an AC-Link frame, and contains a total of 256 bits. The frame rate is 48kHz. This makes it possible to simultaneously transmit and receive multiple data streams (e.g. audio, touchpanel, AUXDAC, control) at sample rates up to 48kHz. Detailed information can be found in the AC'97 (Revision 2.2) specification, which can be obtained at www.intel.com/design/chipsets/audio/ Note: SDATAOUT and SYNC must be held low when RESETB is applied. These signals must be held low for the entire duration of the RESETB pulse and especially during the low-to-high transition of RESETB. If SDATAOUT or SYNC is high during reset, the WM9713L may enter test modes. Information relating to this operation is available in the AC'97 specification or in Wolfson applications note WAN-0104 available at www.wolfsonmirco.com. w PP, Rev 3.3, November 2011 27 WM9713L Pre-Production PCM INTERFACE OPERATION WM9713L can implement a PCM voice CODEC function using the dedicated VXDAC and either one or both of the existing hi-fi ADC's. In PCM CODEC mode, VXDAC input and ADC output are interfaced via a PCM style port via GPIO pins. This interface can support one ADC channel, or stereo/dual ADC channels if required, (two channels of data are sent per PCM frame as back to back words). In voice only mode, the AC link is used only for control information, not audio data. Therefore it will generally be shut down (PR4=1), except when control data must be sent. The PCM interface makes use of 4 of the GPIO interface pins, for clock, frame, and data in/out. If the PCM CODEC function is not enabled then the GPIO pins may be used for other functions. INTERFACE PROTOCOL The WM9713L PCM audio interface is used for the input of data to the Voice DAC and the output of data from the Stereo ADC. When enabled, the PCM audio interface uses four GPIO pins: GPIO1/PCMCLK: Bit clock GPIO3/PCMFS: Frame Sync GPIO4/PCMDAC: Voice DAC data input GPIO5/PCMADC: Stereo ADC data output Depending on the mode of operation (see "PCM Interface Modes"), at least one of these four pins must be set up as an output by writing to register 4Ch (see Table 62). When not enabled the GPIOs may be used for other functions on the WM9713L. PCM INTERFACE MODES The WM9713L PCM audio interface may be configured in one of four modes: Disabled Mode: The WM9713L disables and tri-states all PCM interface pins. Any clock input is ignored and ADC/DAC data is not transferred. Slave Mode: The WM9713L accepts PCMCLK and PCMFS as inputs from an external source. Master Mode: The WM9713L generates PCMCLK and PCMFS as outputs. Partial Master Mode: The WM9713L generates PCMCLK as an output, and accepts PCMFS as an external input. PCM AUDIO DATA FORMATS Four different audio data formats are supported: DSP mode Left justified Right justified 2 IS All four of these modes are MSB first. They are described below. Refer to the Electrical Characteristics section for timing information. Note: PCMCLK and PCMFS must be synchronized with the BITCLK from the AC'97 interface. w PP, Rev 3.3, November 2011 28 WM9713L Pre-Production The PCM Interface may be configured for Mono mode, where only one channel of ADC data is output. In this mode the interface should be configured for DSP mode. A short or long frame sync is supported and the MSB is available on either the 1st (mode B) or 2nd (mode A) rising edge of VXCLK. Note that when operating in stereo mode the mono Voice DAC always uses the left channel data as its input. 1/fs 1 PCMCLK PCMFS PCMCLK PCMADC/ PCMDAC 1 2 3 n-2 n-1 MSB n LSB Input Word Length (WL) Figure 13 PCM Interface Mono Mode (mode A, FSP=0) 1/fs 1 PCMCLK PCMFS PCMCLK PCMADC/ PCMDAC 1 2 3 n-2 n-1 MSB n LSB Input Word Length (WL) Figure 14 PCM Interface Mono Mode (mode B, FSP=1) w PP, Rev 3.3, November 2011 29 WM9713L Pre-Production In DSP mode, the left channel MSB is available on either the 1st (mode B) or 2nd (mode A) rising edge of PCMCLK (selectable by FSP) following a rising edge of PCMFS. Right channel data immediately follows left channel data. Depending on word length, PCMCLK frequency and sample rate, there may be unused PCMCLK cycles between the LSB of the right channel data and the next sample. 1/fs 1 BCLK / VXCLK PCMFS PCMCLK RIGHT CHANNEL LEFT CHANNEL PCMADC/ PCMDAC 1 2 3 n-2 n-1 MSB n 1 2 3 n-2 n-1 n LSB Input Word Length (WL) Figure 7 DSP Mode Audio Interface (mode A, FSP=0) 1/fs 1 BCLK / VXCLK PCMFS PCMCLK RIGHT CHANNEL LEFT CHANNEL PCMADC/ PCMDAC 1 2 3 n-2 n-1 MSB n 1 2 3 n-2 n-1 n LSB Input Word Length (WL) Figure 15 DSP Mode Audio Interface (mode B, FSP=1) w PP, Rev 3.3, November 2011 30 WM9713L Pre-Production In Left Justified mode, the MSB is available on the first rising edge of PCMCLK following a PCMFS transition. The other bits up to the LSB are then transmitted in order. Depending on word length, PCMCLK frequency and sample rate, there may be unused PCMCLK cycles before each PCMFS transition. 1/fs LEFT CHANNEL RIGHT CHANNEL PCMFS PCMCLK PCMADC/ PCMDAC 1 2 3 n-2 n-1 MSB n 1 LSB 2 3 n-2 n-1 MSB n LSB Figure 16 Left Justified Audio Interface (assuming n-bit word length) In Right Justified mode, the LSB is available on the last rising edge of PCMCLK before a PCMFS transition. All other bits are transmitted before (MSB first). Depending on word length, PCMCLK frequency and sample rate, there may be unused PCMCLK cycles after each PCMFS transition. 1/fs LEFT CHANNEL RIGHT CHANNEL PCMFS PCMCLK PCMADC / PCMDAC 1 2 3 n-2 n-1 MSB n 1 2 3 n-2 n-1 n LSB MSB LSB Figure 17 Right Justified Audio Interface (assuming n-bit word length) 2 In I S mode, the MSB is available on the second rising edge of PCMCLK following a PCMFS transition. The other bits up to the LSB are then transmitted in order. Depending on word length, PCMCLK frequency and sample rate, there may be unused PCMCLK cycles between the LSB of one sample and the MSB of the next. 1/fs LEFT CHANNEL RIGHT CHANNEL PCMFS PCMCLK 1 BCLK 1 BCLK PCMADC/ PCMDAC 1 MSB 2 3 n-2 n-1 n LSB 1 2 3 MSB n-2 n-1 n LSB 2 Figure 18 I S Justified Audio Interface (assuming n-bit word length) w PP, Rev 3.3, November 2011 31 WM9713L Pre-Production CONTROL The register bits controlling PCM audio format, word length and operating modes are summarised below. CTRL must be set to override the normal use of the PCM interface pins as GPIOs, MODE must be set to specify master/slave modes. REGISTER ADDRESS 36h BIT 15 LABEL CTRL DEFAULT 0 PCM Control DESCRIPTION GPIO Pin Configuration Control 0 = GPIO pins as GPIOs 1 = GPIO pins configured as PCM interface and controlled by this register 14:13 MODE 10 PCM Interface Mode Control 00 = PCM interface disabled [PCMCLK tristated, PCMFS tri-stated] 01 = PCM interface in slave mode [PCMCLK as input, PCMFS as input] 10 = PCM interface in master mode [PCMCLK as output, PCMFS as output] 11 = PCM interface in partial master mode [PCMCLK as output, PCMFS as input] 11:9 DIV 010 PCMCLK Rate Control 000 = Voice DAC clock 001 = Voice DAC clock / 2 010 = Voice DAC clock / 4 011 = Voice DAC clock / 8 100 = Voice DAC clock / 16 All other values are reserved 8 VDACOSR 1 Voice DAC Oversampling Rate Control 0: 128 x fs 1: 64 x fs 7 CP 0 PCMCLK Polarity Control 0 = Normal 1 = Inverted 6 5:4 FSP SEL 0 10 FMT = 00, 01 or 10 FMT = 11 PCMFS Polarity Control DSP Mode Control 0 = Normal 0 = DSP Mode A 1 = Inverted 1 = DSP Mode B PCM ADC Output Channel Control 00 = Normal stereo 01 = Reverse stereo 10 = Output left ADC data only 11 = Output right ADC data only 3:2 WL 00 PCM Data Word Length Control 00 = 16-bit 01 = 20-bit 10 = 24-bit 11 = 32-bit (not supported when FMT=00) 1:0 FMT 11 PCM Data Format Control 00 = Right justified 01 = Left justified 2 10 = I S 11 = DSP mode Table 8 PCM CODEC Control Note: Right justified does not support 32-bit data. w PP, Rev 3.3, November 2011 32 WM9713L Pre-Production AUDIO ADCS STEREO ADC The WM9713L has a stereo sigma-delta ADC to digitize audio signals. The ADC achieves high quality audio recording at low power consumption. The ADC sample rate can be controlled by writing to a control register (see "Variable Rate Audio"). It is independent of the DAC sample rate. To save power, the left and right ADCs can be separately switched off using the Powerdown bits ADCL and ADCR (register 3Ch, bits 5:4), whereas PR0 disables both ADCs (see "Power Management" section). If only one ADC is running, the same ADC data appears on both the left and right AC-Link slots. The output from the ADC can be sent over either the AC link as usual, or output via the PCM interface which may be configured on the GPIO pins. HIGH PASS FILTER The WM9713L audio ADC incorporates a digital high pass filter that eliminates any DC bias from the ADC output data. The filter is enabled by default. For DC measurements, it can be disabled by writing a `1' to the HPF bit (register 5Ch, bit 3). This high pass filter corner frequency can be selected to have different values in WM9713L, to suit applications such as voice where a higher cutoff frequency is required. REGISTER ADDRESS 5Ch BIT 3 LABEL HPF DEFAULT 0 DESCRIPTION ADC HPF Disable Control 0 = HPF enabled (for audio) 1 = HPF disabled (for DC measurements) 5Ah 5:4 HPMODE 00 HPF Cut-Off Control 00 = 7Hz @ fs=48kHz 01 = 82Hz @ fs=16kHz 10 = 82Hz @ fs=8kHz 11 = 170Hz @ fs=8kHz Note: the filter corner frequency is proportional to the sample rate. Table 9 Controlling the ADC Highpass Filter ADC SLOT MAPPING By default, the output of the left audio ADC appears on slot 3 of the SDATAIN signal (pin 8), and the right ADC data appears on slot 4. However, the ADC output data can also be sent to other slots, by setting the ASS (ADC slot select) control bits as shown below. REGISTER ADDRESS 5Ch BIT 1:0 LABEL DEFAULT ASS 00 Additional Functions (2) DESCRIPTION ADC Data Slot Mapping Control Left Data Right Data 00 = Slot 3 Slot 4 01 = Slot 7 Slot 8 10 = Slot 6 Slot 9 11 = Slot 10 Slot 11 Table 10 ADC Slot Mapping w PP, Rev 3.3, November 2011 33 WM9713L Pre-Production RECORD SELECTOR The record selector determines which input signals are routed into the audio ADC. The left and right channels can be selected independently. This is useful for recording a phone call: one channel can be used for the RX signal and the other for the TX signal, so that both sides of the conversation are digitized. REGISTER ADDRESS 14h BIT 6 LABEL RECBST DEFAULT 0 Record Routing / Mux Select DESCRIPTION ADC Record Boost Control 1 = +20dB 0 = 0dB Note: RECBST gain is in addition to the microphone pre-amps (MPABST and MPBBST bits) and record gain (GRL and GRR / GRL bits). 5:3 RECSL 000 Left Record Mux Source Control 000 = MICA (pre-PGA) 001 = MICB (pre-PGA) 010 = LINEL (pre-PGA) 011 = MONOIN (pre-PGA) 100 = HPMIXL 101 = SPKMIC 110 = MONOMIX 111 = Reserved 2:0 RECSR 000 Right Record Mux Source Control 000 = MICA (pre-PGA) 001 = MICB (pre-PGA) 010 = LINEL (pre-PGA) 011 = MONOIN (pre-PGA) 100 = HPMIXL 101 = SPKMIC 110 = MONOMIX 111 = Reserved Table 11 Audio Record Selector w PP, Rev 3.3, November 2011 34 WM9713L Pre-Production RECORD GAIN The amplitude of the signal that enters the audio ADC is controlled by the Record PGA (Programmable Gain Amplifier). The PGA gain can be programmed either by writing to the Record Gain register, or by the Automatic Level Control (ALC) circuit (see next section). When the ALC is enabled, any writes to the Record Gain register have no effect. Two different gain ranges can be implemented: the standard gain range defined in the AC'97 standard, or an extended gain range with smaller gain steps. The ALC circuit always uses the extended gain range, as this has been found to result in better sound quality. REGISTER ADDRESS 12h BIT 15 LABEL RMU DEFAULT 1 Record Gain DESCRIPTION Audio ADC Input Mute Control 1 = Mute 0 = No mute Note: This control applies to both channels 14 GRL 0 Left ADC PGA Gain Range Control 1 = Extended 0 = Standard 13:8 7 RECVOLL ZC 000000 0 Left ADC Recording Volume Control Standard (GRL=0) Extended (GRL=1) XX0000: 0dB 000000: -17.25dB XX0001: +1.5dB 000001: -16.5dB ... (1.5dB steps) ... (0.75dB steps) XX1111: +22.5dB 111111: +30dB ADC PGA Zero Cross Control 1 = Zero cross enabled (volume changes when signal is zero or after time-out) 0 = Zero cross disabled (volume changes immediately) 6 GRR 0 Right ADC PGA Gain Range Control 1 = Extended 0 = Standard 5:0 RECVOLR 000000 Right ADC Recording Volume Control Standard (GRR=0) Extended (GRR=1) XX0000 = 0dB 000000 = -17.25dB ... (1.5dB steps) ... (0.75dB steps) XX1111 = +22.5dB XX1111 = +30dB Table 12 Record Gain Register The output of the Record PGA can also be mixed into the phone and/or headphone outputs (see "Audio Mixers"). This makes it possible to use the ALC function for the microphone signal in a smartphone application. w PP, Rev 3.3, November 2011 35 WM9713L Pre-Production REGISTER ADDRESS 14h BIT 15:14 LABEL R2H DEFAULT 11 (mute) Record Routing DESCRIPTION Record Mux to Headphone Mixer Path Control 00 = stereo 01 = left ADC only 10 = right ADC only 11=mute left and right 13:11 R2HVOL 010 (0dB) Record Mux to Headphone Mixer Path Volume Control 000 = +6dB ... (+3dB steps) 111 = -15dB 10:9 R2M 11 (mute) Record Mux to Mono Mixer Path Control 00 = stereo 01 = left record mux only 10 = right record mux only 11 = mute left and right 8 R2MBST 0 (OFF) Record Mux to Headphone Mixer Boost Control 1 = +20dB 0 = 0dB Table 13 Record PGA Routing Control w PP, Rev 3.3, November 2011 36 WM9713L Pre-Production AUTOMATIC LEVEL CONTROL The WM9713L has an automatic level control that aims to keep a constant recording volume irrespective of the input signal level. This is achieved by continuously adjusting the PGA gain so that the signal level at the ADC input remains constant. A digital peak detector monitors the ADC output and changes the PGA gain if necessary. input signal PGA gain signal after ALC ALC target level hold time decay time attack time Figure 19 ALC Operation The ALC function is enabled using the ALCSEL control bits. When enabled, the recording volume can be programmed between -6dB and -28.5dB (relative to ADC full scale) using the ALCL register bits. HLD, DCY and ATK control the hold, decay and attack times, respectively. HOLD TIME Hold time is the time delay between the peak level detected being below target and the PGA gain n beginning to ramp up. It can be programmed in power-of-two (2 ) steps, e.g. 2.67ms, 5.33ms, 10.67ms etc. up to 43.7s. Alternatively, the hold time can also be set to zero. The hold time only applies to gain ramp-up, there is no delay before ramping the gain down when the signal level is above target. DECAY (GAIN RAMP-UP) TIME Decay time is the time that it takes for the PGA gain to ramp up across 90% of its range (e.g. from -15B up to 27.75dB). The time it takes for the recording level to return to its target value therefore depends on both the decay time and on the gain adjustment required. If the gain adjustment is small, n it will be shorter than the decay time. The decay time can be programmed in power-of-two (2 ) steps, from 24ms, 48ms, 96ms, etc. to 24.58s. ATTACK (GAIN RAMP-DOWN) TIME Attack time is the time that it takes for the PGA gain to ramp down across 90% of its range (e.g. from 27.75dB down to -15B gain). The time it takes for the recording level to return to its target value therefore depends on both the attack time and on the gain adjustment required. If the gain adjustment is small, it will be shorter than the attack time. The attack time can be programmed in power-of-two n (2 ) steps, from 6ms, 12ms, 24ms, etc. to 6.14s. w PP, Rev 3.3, November 2011 37 WM9713L Pre-Production When operating in stereo, the peak detector takes the maximum of left and right channel peak values, and any new gain setting is applied to both left and right PGAs, so that the stereo image is preserved. However, the ALC function can also be enabled on one channel only. In this case, only one PGA is controlled by the ALC mechanism, while the other channel runs independently with its PGA gain set through the control register. When one ADC channel is unused, the peak detector disregards that channel. The ALC function can also operate when the two ADC outputs are mixed to mono in the digital domain, but not if they are mixed to mono in the analogue domain, before entering the ADCs. REGISTER ADDRESS 62h BIT 15:14 LABEL ALCSEL ALC / Noise Gate Control DEFAULT DESCRIPTION 00 ALC Function Channel Control (OFF) 00 = ALC disabled 01 = ALC on right channel only 10 = ALC or left channel only 11 = ALC on both left and right channels 13:11 MAXGAIN 111 ALC PGA Gain Limit Control (+30dB) 000 = -12dB ... (6dB steps) 111 = +30dB 10:9 ZCTIMEOUT 11 ALC Zero Cross Timeout Delay Control 14 00 = 2 x tBITCLK (1.33ms) 15 01 = 2 x tBITCLK (2.67ms) 16 10 = 2 x tBITCLK (5.33ms) 17 11 = 2 x tBITCLK (10.67ms) Note: Timeout delay values shown when BITCLK=12.288MHz 60h 15:12 ALCL ALC Control 1011 ALC Target Level Control (-12dB) 0000 = -28.5dBFS ... (1.5dB steps) 1111 = -6dBFS Note: This is the target signal level at the ADC input 11:8 HLD 0000 ALC Hold Time Control (0ms) 0000 = 0ms 0001 = 2.67ms ... (time doubles with every step) 1111 = 43.691s 7:4 DCY 0011 ALC Decay Time Control (192ms) 0000 = 24ms ... (time doubles with every step) 1010 to 1111 = 24.58s 3:0 ATK 0010 ALC Attack Time Control (24ms) 0000 = 6ms ... (time doubles with every step) 1010 to 1111 = 6.14s Table 14 ALC Control w PP, Rev 3.3, November 2011 38 WM9713L Pre-Production MAXIMUM GAIN The MAXGAIN register sets the maximum gain value that the PGA can be set to whilst under the control of the ALC. This has no effect on the PGA when ALC is not enabled. PEAK LIMITER To prevent clipping when a large signal occurs just after a period of quiet, the ALC circuit includes a limiter function. If the ADC input signal exceeds 87.5% of full scale (-1.16dB), the PGA gain is ramped down at the maximum attack rate (as when ATK = 0000), until the signal level falls below 87.5% of full scale. This function is automatically enabled whenever the ALC is enabled. (Note: If ATK = 0000, then the limiter makes no difference to the operation of the ALC. It is designed to prevent clipping when long attack times are used). NOISE GATE When the signal is very quiet and consists mainly of noise, the ALC function may cause "noise pumping", i.e. loud hissing noise during silence periods. The WM9713L has a noise gate function that prevents noise pumping by comparing the signal level at the input pins (i.e. before the record PGA) against a noise gate threshold, NGTH. Provided that the noise gate function is enabled (NGAT = 1), the noise gate cuts in when: Signal level at ADC [dB] < NGTH [dB] + PGA gain [dB] + Mic Boost gain [dB] This is equivalent to: Signal level at input pin [dB] < NGTH [dB] The PGA gain is then held constant (preventing it from ramping up as it normally would when the signal is quiet). If the NGG bit is set, the ADC output is also muted when the noise gate cuts in. The table below summarises the noise gate control register. The NGTH control bits set the noise gate threshold with respect to the ADC full-scale range. The threshold is adjusted in 1.5dB steps. Levels at the extremes of the range may cause inappropriate operation, so care should be taken with set-up of the function. Note that the noise gate only works in conjunction with the ALC function, and always operates on the same channel(s) as the ALC (left, right, both, or none). REGISTER ADDRESS 62h BIT 7 LABEL NGAT DEFAULT 0 ALC / Noise Gate Control DESCRIPTION Noise Gate Enable Control 0 = Disabled 1 = Enabled 5 NGG 0 Noise Gate Function Control 0 = Hold PGA gain at last value 1 = Mute ADC output 4:0 NGTH(4:0) 00000 Noise Gate Threshold Control 00000 = -76.5dBFS ... (1.5dB steps) 11111 = -30dBFS Table 15 Noise Gate Control w PP, Rev 3.3, November 2011 39 WM9713L Pre-Production AUDIO DACS STEREO DAC The WM9713L has a stereo sigma-delta DAC that achieves high quality audio playback at low power consumption. Digital tone control, adaptive bass boost and 3-D enhancement functions operate on the digital audio data before it is passed to the stereo DAC. (Contrary to the AC'97 specification, they have no effect on analogue input signals or signals played through the auxiliary DAC. Nevertheless, the ID2 and ID5 bits in the reset register, 00h, are set to `1' to indicate that the WM9713L supports tone control and bass boost.) The DAC output has a PGA for volume control. The DAC sample rate can be controlled by writing to a control register (see "Variable Rate Audio"). It is independent of the ADC sample rate. When not in use the DACs can be separately powered down using the Powerdown register bits DACL and DACR (register 3Ch, bits [7:6]). STEREO DAC VOLUME The volume of the DAC output signal is controlled by a PGA (Programmable Gain Amplifier). Each DAC can be mixed into the headphone, speaker and mono mixer paths (see "Audio Mixers") controlled by register 0Ch. Each DAC-to-mixer path has an independent mute bit. When all DAC-to-mixer paths are muted the DAC PGA is muted automatically. When not in use the DAC PGAs can be powered down using the Powerdown register bits DACL and DACR (register 3Ch, bits [7:6]). REGISTER ADDRESS 0Ch BIT 15 LABEL D2H DEFAULT 1 DAC Volume DESCRIPTION DAC to Headphone Mixer Mute Control 1 = Mute 0 = No mute 14 D2S 1 DAC to Speaker Mixer Mute Control 1 = Mute 0 = No mute 13 D2M 1 DAC to Mono Mixer Mute Control 1 = Mute 0 = No mute 12:8 DACL 01000 Left DAC to Mixers Volume Control VOL (0dB) 00000 = +12dB ... (1.5dB steps) 11111 = -34.5dB 4:0 DACR 01000 Right DAC to Mixers Volume Control VOL (0dB) 00000 = +12dB ... (1.5dB steps) 11111 = -34.5dB 5Ch Additional Functions (2) 15 AMUTE 0 DAC Automute Status (Read-Only) 0 = DAC not muted 1 = DAC auto-muted 7 AMEN 0 DAC Automute Control 0 = Disabled 1 = Enabled (DAC automatically muted when digital input is zero) Table 16 Stereo DAC Volume Control w PP, Rev 3.3, November 2011 40 WM9713L Pre-Production TONE CONTROL / BASS BOOST The WM9713L provides separate controls for bass and treble with programmable gains and filter characteristics. This function operates on digital audio data before it is passed to the audio DACs. Bass control can take two different forms: Linear bass control: bass signals are amplified or attenuated by a user programmable gain. This is independent of signal volume, and very high bass gains on loud signals may lead to signal clipping. Adaptive bass boost: The bass volume is amplified by a variable gain. When the bass volume is low, it is boosted more than when the bass volume is high. This method is recommended because it prevents clipping, and usually sounds more pleasant to the human ear. Treble control applies a user programmable gain, without any adaptive boost function. Treble, linear bass and 3D enhancement can all produce signals that exceed full-scale. In order to avoid limiting under these conditions, it is recommended to set the DAT bit to attenuate the digital input signal by 6dB. The gain at the outputs should be increased by 6dB to compensate for the attenuation. Cut-only tone adjustment (i.e. bass and treble gains 0) and adaptive bass boost cannot produce signals above full-scale and therefore do not require the DAT bit to be set. REGISTER ADDRESS 20h BIT 15 LABEL BB DEFAULT 0 DAC Tone Control DESCRIPTION Bass Mode Control 0 = Linear bass control 1 = Adaptive bass boost 12 BC 0 Bass Cut-off Frequency Control 0 = Low (130Hz at 48kHz sampling) 1 = High (200Hz at 48kHz sampling) 11:8 BASS 1111 (off) Bass Intensity Control BB=0 BB=1 0000 = +9dB 0000 = 15dB 0001 = +9dB ... (1dB steps) ... (1.5dB steps) 1110 = 1dB 0111 = 0dB 1111 = Bypass (off) ... (1.5dB steps) 1011-1110 = -6dB 1111 = Bypass (off) 6 DAT 0 Pre-DAC Attenuation Control 0 = 0dB 1 = -6dB 4 TC 0 Treble Cut-off Frequency Control 0 = High (8kHz at 48kHz sampling) 1 = Low (4kHz at 48kHz sampling) 3:0 TRBL 1111 (Disabled) Treble Intensity Control 0000 = +9dB 0001 = +9dB ... (1.5dB steps) 0111 = 0dB ... (1.5dB steps) 1011-1110 = -6dB 1111 = Bypass (off) Table 17 DAC Tone Control Note: 1. w All cut-off frequencies change proportionally with the DAC sample rate. PP, Rev 3.3, November 2011 41 WM9713L Pre-Production 3D STEREO ENHANCEMENT The 3D stereo enhancement function artificially increases the separation between the left and right channels by amplifying the (L-R) difference signal in the frequency range where the human ear is sensitive to directionality. The programmable 3D depth setting controls the degree of stereo expansion introduced by the function. Additionally, the upper and lower limits of the frequency range used for 3D enhancement can be selected using the 3DFILT control bits. REGISTER ADDRESS 40h BIT 13 LABEL 3DE General Purpose 1Eh DEFAULT 0 (disabled) DESCRIPTION 3D Enhancement Control 1 = Enabled 0 = Disabled 5 3DLC 0 DAC 3D Control 3D Lower Cut-off Frequency Control 1 = High (500Hz at 48kHz sampling) 0 = Low (200Hz at 48kHz sampling) 4 3DUC 0 3D Upper Cut-off Frequency Control 1 = Low (1.5kHz at 48kHz sampling) 0 = High (2.2kHz at 48kHz sampling) 3:0 3DDEPTH 0000 3D Depth Control 0000 = 0% ... (6.67% steps) 1111 = 100% Table 18 Stereo Enhancement Control Note: 1. w All cut-off frequencies change proportionally with the DAC sample rate. PP, Rev 3.3, November 2011 42 WM9713L Pre-Production VOICE DAC VXDAC is a 16-bit mono DAC intended for playback of Rx voice signals input via the PCM interface. Performance has been optimised for operating at 8ks/s or 16ks/s. The VXDAC will function at other sample rates up to 48ks/s, but this is not recommended. The analogue output of VXDAC is routed directly into the output mixers. The signal gain into each mixer can be adjusted at the mixer inputs using control register 18h. When not in use the VXDAC can be powered down using the Powerdown register bit VXDAC (register 3Ch, bit 12). REGISTER ADDRESS 3Ch BIT 12 LABEL VXDAC DEFAULT 1 Powerdown (1) DESCRIPTION VXDAC Disable Control 1 = Disabled 0 = Enabled 15 18h V2H 1 VXDAC Output Control VXDAC to Headphone Mixer Mute Control 1 = Mute 0 = No mute 14:12 V2HVOL 010 (0dB) VXDAC to Headphone Mixer Volume Control 000 = +6dB ... (+3dB steps) 111 = -15dB 11 V2S 1 VXDAC to Speaker Mixer Mute Control 1 = Mute 0 = No mute 10:8 V2SVOL 010 (0dB) VXDAC to Speaker Mixer Volume Control 000 = +6dB ... (+3dB steps) 111 = -15dB 7 V2M 1 VXDAC to Mono Mixer Mute Control 1 = Mute 0 = No mute 6:4 V2MVOL 010 (0dB) VXDAC to Mono Mixer Volume Control 000 = +6dB ... (+3dB steps) 111 = -15dB Table 19 VXDAC Control Note: 1. w In order to minimise power consumption, the following sequence should be executed before disabling the Voice DAC: R44h = 0280h wait at least 3 AC link frames for mode to change R44h = 0F80h Run Voice DAC at fs=6 kHz R3Ch: bit 12 = 1 Disable Voice DAC. This write must occur immediately after the write to register R44h. Run Voice DAC at fs=48 kHz PP, Rev 3.3, November 2011 43 WM9713L Pre-Production AUXILIARY DAC AUXDAC is a simple 12-bit mono DAC. It can be used to generate DC signals (with the numeric input written into a control register), or AC signals such as telephone-quality ring tones or system beeps (with the input signal supplied through an AC-Link slot). In AC mode (XSLE = 1), the input data is binary offset coded; in DC mode (XSLE = 0), there is no offset. The analogue output of AUXDAC is routed directly into the output mixers. The signal gain into each mixer can be adjusted at the mixer inputs using control register 12h. In slot mode (XSLE = 1), the AUXDAC also supports variable sample rates (See "Variable Rate Audio" section). When not in use the auxiliary DAC can be powered down using the Powerdown register bit AUXDAC (register 3Ch, bit 11). REGISTER ADDRESS 3Ch BIT 11 LABEL AUXDAC DEFAULT 0 Powerdown (1) DESCRIPTION AUXDAC Disable Control 1 = Disabled 0 = Enabled 64h 15 XSLE 0 AUXDAC Input Select Control 0 = From AUXDACVAL[11:0] (for DC signals) AUXDAC Input Control 1 = From AC-Link (for AC signals) 14:12 AUXDAC 000 SLT AUXDAC Input Control (XSLE=1) 000 = Slot 5, bits 8-19 001 = Slot 6, bits 8-19 010 = Slot 7, bits 8-19 011 = Slot 8, bits 8-19 100 = Slot 9, bits 8-19 101 = Slot 10, bits 8-19 110 = Slot 11, bits 8-19 111 = Reserved 11:0 AUXDAC VAL 000h AUXDAC Input Control (XSLE=0) 000h = Minimum FFFh = Full scale w PP, Rev 3.3, November 2011 44 WM9713L Pre-Production REGISTER ADDRESS 1Ah BIT 15 LABEL A2H DEFAULT 1 AUXDAC Output Control DESCRIPTION AUXDAC to Headphone Mixer Mute Control 1 = Mute 0 = No mute 14:12 A2HVOL 010 (0dB) AUXDAC to Headphone Mixer Volume Control 000 = +6dB ... (+3dB steps) 111 = -15dB 11 A2S 1 AUXDAC to Speaker Mixer Mute Control 1 = Mute 0 = No mute 10:8 A2SVOL 010 (0dB) AUXDAC to Speaker Mixer Volume Control 000 = +6dB ... (+3dB steps) 111 = -15dB 7 A2M 1 AUXDAC to Mono Mixer Mute Control 1 = Mute 0 = No mute 6:4 A2MVOL 010 (0dB) AUXDAC to Mono Mixer Volume Control 000 = +6dB ... (+3dB steps) 111 = -15dB Table 20 AUXDAC Control w PP, Rev 3.3, November 2011 45 WM9713L Pre-Production VARIABLE RATE AUDIO / SAMPLE RATE CONVERSION By using an AC'97 Rev2.2 compliant audio interface, the WM9713L can record and playback at all commonly used audio sample rates, and offer full split-rate support (i.e. the DAC, ADC and AUXDAC sample rates are completely independent of each other - any combination is possible). The default sample rate is 48kHz. If the VRA bit in register 2Ah is set, then other sample rates can be selected by writing to registers 2Ch, 32h and 2Eh. The AC-Link continues to run at 48k frames per second irrespective of the sample rate selected. However, if the sample rate is less than 48kHz, then some frames do not carry an audio sample. REGISTER ADDRESS 2Ah BIT 0 LABEL VRA DEFAULT 0 (OFF) Extended Audio Stat/Ctrl DESCRIPTION Variable Rate Audio Control 1 = Enable VRA 0 = Disable VRA (ADC and DAC run at 48kHz) Note: When VRA=1, sample rates are controlled by 2Ch, 2Eh and 32h 2Ch 15:0 DACSR Audio DAC Sample Rate BB80h Stereo DAC Sample Rate Control (48kHz) 1F40h = 8kHz 2B11h = 11.025kHz 2EE0h = 12kHz 3E80h = 16kHz 5622h = 22.05kHz 5DC0h = 24kHz 7D00h = 32kHz AC44h = 44.1kHz BB80h = 48kHz Any other value defaults to the nearest supported sample rate 32h 15:0 ADCSR Audio ADC Sample Rate 2Eh 15:0 AUXDAC Sample Rate AUXDA CSR BB80h Stereo ADC Sample Rate Control (48kHz) Values as DACSR BB80h (48kHz) AUXDAC Sample Rate Control Values as DACSR Table 21 Audio Sample Rate Control Note: Changing the ADC and / or DAC sample rate will only be effective if the ADCs and DACs are enabled and powered up before the sample rate is changed. This is done by setting the relevant bits in registers 26h and 3Ch, as well as the VRA bit in register 2Ah. The process is as follows: w 1. Enable and power up ADCs and or DACs in registers 26h and 3Ch. 2. Enable VRA bit in 2Ah, bit 0. 3. Change the sample rate in the respective register. PP, Rev 3.3, November 2011 46 WM9713L Pre-Production AUDIO INPUTS The following sections give an overview of the analogue audio input pins and their function. For more information on recommended external components, please refer to the "Applications Information" section. LINE INPUT The LINEL and LINER inputs are designed to record line level signals, and/or to mix into one of the analogue outputs. Both pins are directly connected to the record selector. The record PGA adjusts the recording volume, controlled by register 12h or by the ALC function. For analogue mixing, the line input signals pass through a separate PGA, controlled by register 0Ah. The signals can be mixed into the headphone, speaker and mono mixer paths (see "Audio Mixers"). Each LINE-to-mixer path has an independent mute bit. When all LINE-to-mixer paths are muted the line PGA is muted automatically. When the line inputs are not used, the line PGA can be switched off to save power (see "Power Management" section). LINEL and LINER are biased internally to the reference voltage VREF. Whenever the inputs are muted or the device placed into standby mode, the inputs remain biased to VREF using special antithump circuitry to suppress any audible clicks when changing inputs. REGISTER ADDRESS 0Ah BIT 15 LABEL L2H DEFAULT 1 DESCRIPTION LINE to Headphone Mixer Mute Control 1 = Mute 0 = No mute 14 L2S 1 LINE to Speaker Mixer Mute Control 1 = Mute 0 = No mute 13 L2M 1 LINE to Mono Mixer Mute Control 1 = Mute 0 = No mute 12:8 LINEL 01000 LINEL to Mixers Volume Control VOL (0dB) 00000 = +12dB ... (1.5dB steps) 11111 = -34.5dB 4:0 LINER 01000 LINER to Mixers Volume Control VOL (0dB) 00000 = +12dB ... (1.5dB steps) 11111 = -34.5dB Table 22 Line Input Control Additionally, line inputs can be used as single-ended microphone inputs through the record mux to provide a clickless ALC function by bypassing offset introduced through the microphone pre-amps. Note that the line inputs to the mixers should all be deselected if this is input configuration is used. w PP, Rev 3.3, November 2011 47 WM9713L Pre-Production MICROPHONE INPUT MICROPHONE PRE-AMPS There are two microphone pre-amplifiers, MPA and MPB, which can be configured in a variety of ways to accommodate up to 3 selectable differential microphone inputs or 2 differential microphone inputs operating simultaneously for stereo or noise cancellation. The microphone input circuit is shown in Figure 20. Vmid MIC1 Vmid 22h: 13-12 22h:11-10 00 = +12dB 11 = +30dB MICA MIC2A Vmid MICB MIC2B 22h:9-8 00 = +12dB 11 = +30dB MICCM Figure 20 Microphone Input Circuit The input pins used for the microphones are MIC1, MICCM, MIC2A and MIC2B. Note that input pins MIC2A and MIC2B are multi-function inputs and must be configured for use as microphone inputs when required. This is achieved using MICCMPSEL[1:0] in register 22h (see Table 23). The input to microphone pre-amp A can be selected from any of the three microphone inputs MIC1, MIC2A and MIC2B using MPASEL[1:0]. Each pre-amp has independent boost control from +12dB to +30dB in four steps. This is controlled by MPABST[1:0] and MPBBST[1:0]. When not in use each microphone pre-amp can be powered down using the Powerdown register bits MPA and MPB (register 3Eh, bits [1:0]). When disabled the inputs are tied to Vmid (for MIC2A and MIC2B this only applies when they are selected as microphone inputs, otherwise they are left floating). w PP, Rev 3.3, November 2011 48 WM9713L Pre-Production REGISTER ADDRESS 22h BIT LABEL 15:14 MICCMPSEL DEFAULT 00 DESCRIPTION MIC2A/MIC2B Pin Function Control 00 = MIC2A and MIC2B are mic inputs 01 = MIC2A mic input only 10 = MIC2B mic input only 11 = MIC2A and MIC2B are not mic inputs 13:12 MPASEL 00 MPA Pre-Amp Source Control 00 = MIC1 01 = MIC2A 10 = MIC2B 11 = Reserved 11:10 MPABST 00 MPA Pre-Amp Volume Control 00 = +12dB 01 = +18dB 10 = +24dB 11 = +30dB 9:8 MPBBST 00 MPB Pre-Amp Volume Control As MPABST Table 23 Microphone Pre-amp Control w PP, Rev 3.3, November 2011 49 WM9713L Pre-Production SINGLE MIC OPERATION Up to three microphones can be connected in a single-ended configuration. Any one of the three MICs can be selected as the input to MPA using MPASEL[1:0] (Register 22h, bits 13:12). Only the microphone on MIC2B can be selected to MPB. Note that MPABST always sets the gain for the selected MPA input microphone. If MIC2B is the selected input for MPA it is recommended that MPB is disabled. DUAL MIC OPERATION Up to two microphones can be connected in a dual differential configuration. This is suitable for stereo microphone or noise cancellation applications. Mic1 is connected between the MIC2A and MICCM inputs and mic2 is connected between the MIC2B and MICCM inputs as shown in Figure 21. Additionally, another microphone can be supported on MIC1 selected through the MPA input mux. Note that the microphones can be connected in a single-ended configuration. Figure 21 Dual Microphone Configuration w PP, Rev 3.3, November 2011 50 WM9713L Pre-Production MICROPHONE BIASING CIRCUIT The MICBIAS output provides a low noise reference voltage suitable for biasing electret type microphones and the associated external resistor biasing network. Refer to the Applications Information section for recommended external components. The MICBIAS voltage can be altered via MBVOL in register 22h. MICBIAS=0.75*AVDD. When MBVOL=0, MICBIAS=0.9*AVDD and when MBVOL=1, The microphone bias is driven to a dedicated MICBIAS pin 28 and is enabled by MPOP1EN in register 22h. It can also be configured to drive out on GPIO8 pin 12 enabled by MPOP2EN in register 22h. When not in use the microphone bias can be powered down using the Powerdown register bit MICBIAS (register 3Eh, bit 14). REGISTER ADDRESS 22h BIT 7 LABEL MBOP2EN DEFAULT 0 (Off) DESCRIPTION MICBIAS Output 2 Enable Control 1 = Enable MICBIAS output on GPIO8 (pin 12) 0 = Disable MICBIAS output on GPIO8 (pin 12) 6 MBOP1EN 1 (On) MICBIAS Output 1 Enable Control 1 = Enable MICBIAS output on MICBIAS (pin 28) 0 = Disable MICBIAS output on MICBIAS (pin 28) 5 MBVOL 0 MICBIAS Output Voltage Control 1 = 0.75 x AVDD 0 = 0.9 x AVDD Table 24 Microphone Bias Voltage Control The internal MICBIAS circuitry is shown in Figure 22. Note that the maximum source current capability for MICBIAS is 3mA. The external biasing resistors therefore must be large enough to limit the MICBIAS current to 3mA. Figure 22 Microphone Bias Schematic w PP, Rev 3.3, November 2011 51 WM9713L Pre-Production MICBIAS CURRENT DETECT The WM9713L includes a microphone bias current detect circuit with programmable thresholds for the microphone bias current, above which an interrupt will be triggered. There are two separate interrupt bits, MICDET to e.g. distinguish between one or two microphones connected to the WM9713L, and MICSHT to detect a shorted microphone (mic button press). The microphone current detect threshold is set by MCDTHR[2:0], for MICDET, and MCDSCTHR[1:0] for MICSHT. Thresholds for each code are shown in Table 25 When not in use the microphone bias current detect circuit can be powered down using the Powerdown register bit MCD (register 3Eh, bit 15). See the GPIO and Interrupt Controller sections for details on the interrupt and status readback for these MICBIAS current detection features. REGISTER ADDRESS 22h BIT 4:2 LABEL MCDTHR DEFAULT 000 DESCRIPTION Mic Detect Threshold Control 000 = 100A ... (100A steps) 111 = 800A Note: These values are for 3.3V supply and scale with supply voltage (AVDD). 1:0 MCDSCTR 00 Mic Detect Short Circuit Threshold Control 00 = 600A 01 = 1200uA 10 = 1800uA 11 = 2400A Note: These values are for 3.3V supply and scale with supply voltage (AVDD). Table 25 Microphone Current Detect Control w PP, Rev 3.3, November 2011 52 WM9713L Pre-Production MICROPHONE PGAS The microphone pre-amps MPA and MPB drive into two microphone PGAs whose gain is controlled by register 0Eh. The PGA signals can be routed into the headphone mixers and the mono mixer, but not the speaker mixer (to prevent forming a feedback loop) controlled by register 10h. When the PGA signals are not selected as an input to any of the mixers the outputs of the PGAs are muted automatically. When not in use the microphone PGAs can be powered down using the Powerdown register bits MA and MB (register 3Eh, bits [3:2]). REGISTER ADDRESS 0Eh BIT 12:8 LABEL MICAVOL Mic PGA Volume DEFAULT DESCRIPTION 01000 MICA PGA Volume Control (0dB) 00000 = +12dB ... (1.5dB steps) 11111 = -34.5dB 4:0 MICBVOL 01000 MICB PGA Volume Control (0dB) 00000 = +12dB ... (1.5dB steps) 11111 = -34.5dB Table 26 Microphone PGA Volume Control REGISTER ADDRESS 10h BIT 7 LABEL MA2M DEFAULT 1 MIC Routing DESCRIPTION MICA to Mono Mixer Mute Control 1 = Mute 0 = No mute 6 MB2M 1 MICB to Mono Mixer Mute Control 1 = Mute 0 = No mute 5 MIC2MBST 0 MIC to Mono Mixer Boost Control 1 = +20dB 0 = 0dB 4:3 MIC2H 11 MIC to Headphone Mixer Path Control 00 = stereo 01 = MICA only 10 = MICB only 11 = mute MICA and MICB 2:0 MIC2HVOL 010 (0dB) MIC to Headphone Mixer Path Volume Control 000 = +6dB ... (+3dB steps) 111 = -15dB Table 27 Microphone PGA Routing Control w PP, Rev 3.3, November 2011 53 WM9713L Pre-Production MONOIN INPUT Pin 20 (MONOIN) is a mono input designed to connect to the receive path of a telephony device. The pin connects directly to the record selector for phone call recording (Note: to record both sides of a phone call, one ADC channel should record the MONOIN signal while the other channel records the MIC signal). The record PGA adjusts the recording volume, and is controlled by register 12h or by the ALC function (see "Record Gain" and "Automatic Level Control" sections). REGISTER ADDRESS 14h BIT 15:14 LABEL R2H DEFAULT 11 (mute) Record Routing DESCRIPTION Record Mux to Headphone Mixer Path Control 00 = stereo 01 = left record mux only 10 = right rec mux only 11=mute left and right 13:11 R2HVOL 010 (0dB) Record Mux to Headphone Mixer Path Volume Control 000 = +6dB ... (+3dB steps) 111 = -15dB 10:9 R2M 11 (mute) Record Mux to Mono Mixer Path Control 00 = stereo 01 = left record mux only 10 = right record mux only 11 = mute left and right 8 R2MBST 0 (0dB) Record Mux to Headphone Mixer Boost Control 1 = +20dB 0 = 0dB Table 28 Record PGA Routing Control To listen to the MONOIN signal, the signal passes through a separate PGA, controlled by register 08h. The signal can be routed into the headphone mixer (for normal phone call operation) and/or the speaker mixer (for speakerphone operation), but not into the mono mixer (to prevent forming a feedback loop). When the signal is not selected as an input to any of the mixers the output of the PGA is muted automatically. When not in use the MONOIN PGA can be powered down using the Powerdown register bit MOIN (register 3Eh, bit 4). MONOIN is biased internally to the reference voltage VREF. Whenever the input is muted or the device placed into standby mode, the input remains biased to VREF using special anti-thump circuitry to suppress any audible clicks when changing inputs. w PP, Rev 3.3, November 2011 54 WM9713L Pre-Production REGISTER ADDRESS 08h BIT 15 LABEL M2H DEFAULT 1 MONOIN PGA Vol / Routing DESCRIPTION MONOIN to Headphone Mixer Mute Control 1 = Mute 0 = No mute 14 M2S 1 MONOIN to Speaker Mixer Mute Control 1 = Mute 0 = No mute 12:8 MONOIN 01000 MONOIN to Mixers Volume Control VOL (0dB) 00000 = +12dB ... (1.5dB steps) 11111 = -34.5dB Table 29 Mono PGA Control w PP, Rev 3.3, November 2011 55 WM9713L Pre-Production PCBEEP INPUT Pin 19 (PCBEEP) is a mono, line level input intended for externally generated signal or warning tones. It is routed directly to the record selector and all three output mixers, without an input amplifier. The signal gain into each mixer can be independently controlled, with a separate mute bit for each signal path. PCBEEP is biased internally to the reference voltage VREF. When the signal is not selected as an input to any of the mixers the input remains biased to VREF using special anti-thump circuitry to suppress any audible clicks when changing inputs. REGISTER ADDRESS 16h BIT 15 LABEL B2H DEFAULT 1 PCBEEP input DESCRIPTION PCBEEP to Headphone Mixer Mute Control 1 = Mute 0 = No mute 14:12 B2HVOL 010 (0dB) PCBEEP to Headphone Mixer Volume Control 000 = +6dB ... (+3dB steps) 111 = -15dB 11 B2S 1 PCBEEP to Speaker Mixer Mute Control 1 = Mute 0 = No mute 10:8 B2SVOL 010 (0dB) PCBEEP to Speaker Mixer Volume Control 000 = +6dB ... (+3dB steps) 111 = -15dB 7 B2M 1 PCBEEP to Mono Mixer Mute Control 1 = Mute 0 = No mute 6:4 B2MVOL 010 PCBEEP to Mono Mixer Volume Control (0dB) 000 = +6dB ... (+3dB steps) 111 = -15dB Table 30 PCBEEP Control DIFFERENTIAL MONO INPUT PCBEEP and MONOIN inputs can be configured to provide a differential mono input. This is achieved by mixing the two inputs together using the headphone mixers or the speaker mixer. Note that the gain of the MONOIN PGA must match the gain of the PCBEEP mixer input to achieve a balanced differential mono input. w PP, Rev 3.3, November 2011 56 WM9713L Pre-Production AUDIO MIXERS MIXER OVERVIEW The WM9713L has four separate low-power audio mixers to cover all audio functions required by smartphones, PDAs and handheld computers. These mixers are used to drive the audio outputs HPL, HPR, MONO, SPKL, SPKR, OUT3 and OUT4. There are also two inverters used to provide differential output signals (e.g. for driving BTL loads) HEADPHONE MIXERS There are two headphone mixers, headphone mixer left and headphone mixer right (HPMIXL and HPMIXR). These mixers are the stereo output driver source. They are used to drive the stereo outputs HPL and HPR. They can also be used to drive SPKL and SPKR outputs and, when used in conjunction with OUT3 and OUT4, they can be configured to drive complementary signals through the two output inverters to support bridge-tied load (BTL) stereo loudspeaker outputs. The following signals can be mixed into the headphone path: MONOIN (controlled by register 08h, see "Audio Inputs") LINEL/R (controlled by register 0Ah, see "Audio Inputs") the output of the Record PGA (controlled by register 14h, see "Audio ADC", "Record Gain") the stereo DAC signal (controlled by register 0Ch, see "Audio DACs") the MIC signal (controlled by register 10h, see "Audio Inputs") PC_BEEP (controlled by register 16h, see "Audio Inputs") the VXDAC signal (controlled by register 18h, see "Audio DACs") the AUXDAC signal (controlled by register 1Ah, see "Auxiliary DAC") In a typical smartphone application, the headphone signal is a mix of MONOIN / VXDAC and sidetone (for phone calls) and the stereo DAC signal (for music playback). When not in use the headphone mixers can be powered down using the Powerdown register bits HPLX and HPRX (register 3Ch, bits [3:2]). SPEAKER MIXER The speaker mixer (SPKMIX) is a mono source. It is typically used to drive a mono loudspeaker in BTL configuration. The following signals can be mixed into the speaker path: MONOIN (controlled by register 08h, see "Audio Inputs") LINEL/R (controlled by register 0Ah, see "Audio Inputs") the stereo DAC signal (controlled by register 0Ch, see "Audio DACs") PC_BEEP (controlled by register 16h, see "Audio Inputs") the VXDAC signal (controlled by register 18h, see "Audio DACs") the AUXDAC signal (controlled by register 1Ah, see "Auxiliary DAC") In a typical smartphone application, the speaker signal is a mix of AUXDAC (for system alerts or ring tone playback), MONOIN / VXDAC (for speakerphone function), and PC_BEEP (for externally generated ring tones). Note that when selected the stereo input pairs LINEL/R and DACL/R are summed and attenuated by 6dB so that 0dBFS signals on each channel sum to give a 0dBFS mono signal. When not in use the speaker mixer can be powered down using the Powerdown register bit SPKX (register 3Ch, bit 1). w PP, Rev 3.3, November 2011 57 WM9713L Pre-Production MONO MIXER The mono mixer drives the MONO pin. The following signals can be mixed into MONO: LINEL/R (controlled by register 0Ah, see "Audio Inputs") the output of the Record PGA (controlled by register 14h, see "Audio ADC", "Record Gain") the stereo DAC signal (controlled by register 0Ch, see "Audio DACs") the MIC signal (controlled by register 10h, see "Audio Inputs") PC_BEEP (controlled by register 16h, see "Audio Inputs") the VXDAC signal (controlled by register 18h, see "Audio DACs") the AUXDAC signal (controlled by register 12h, see "Auxiliary DAC") In a typical smartphone application, the MONO signal is a mix of the amplified microphone signal (possibly with Automatic Gain Control) and (if enabled) an audio playback signal from the stereo DAC or the auxiliary DAC. Note that when selected the stereo input pairs LINEL/R and DACL/R are summed and attenuated by 6dB so that 0dBFS signals on each channel sum to give a 0dBFS mono signal. When not in use the mono mixer can be powered down using the Powerdown register bit MX (register 3Ch, bit 0). MIXER OUTPUT INVERTERS There are two general purpose mixer output inverters, INV1 and INV2. Each inverter can be selected to drive HPMIXL, HPMIXR, SPKMIX, MONOMIX or { ( HPMIXL + HPMIXR ) / 2 }. The outputs of the inverters can be used to generate complimentary signals (to drive BTL configured loads) and to provide greater flexibility in output driver configurations. INV1 can be selected as the source for SPKL, MONO and OUT3 and INV2 as the source for SPKR and OUT4. The input source for each inverter is selected using INV1[2:0] and INV2[2:0] in register 1Eh (see Table 31). When no input is selected the inverter is powered down. REGISTER ADDRESS 1Eh BIT 15:13 LABEL INV1 DEFAULT DESCRIPTION 000 INV1 Source Select (no input) 000 = No input (tri-stated) 001 = MONOMIX 010 = SPKMIX 011 = HPMIXL 100 = HPMIXR 101 = HPMIXMONO 110 = Reserved 111 = VMID 12:10 INV2 000 INV2 Source Select (no input) 000 = No input (tri-stated) 001 = MONOMIX 010 = SPKMIX 011 = HPMIXL 100 = HPMIXR 101 = HPMIXMONO 110 = Reserved 111 = VMID Table 31 Mixer Inverter Source Select w PP, Rev 3.3, November 2011 58 WM9713L Pre-Production ANALOGUE AUDIO OUTPUTS The following sections give an overview of the analogue audio output pins. The WM9713L has three outputs capable of driving loads down to 16 (headphone / line drivers) - HPL, HPR and MONO and four outputs capable of driving loads down to 8 (loudspeaker / line drivers) - SPKL, SPKR, OUT3 and OUT4. The combination of output drivers, mixers and mixer inverters means that many output configurations can be supported. For examples of typical output and mixer configurations please refer to the "Typical Output Configurations" section. For more information on recommended external components, please refer to the "Applications Information" section. Each output is driven by a PGA with a gain range of 0dB to -46.5dB in -1.5dB steps. Each PGA has an input source mux, mute and zero-cross detect circuit (delaying gain changes until a zero-cross is detected, or after time-out). HEADPHONE OUTPUTS - HPL AND HPR The HPL and HPR outputs (pins 39 and 41) are designed to drive a 16 or 32 headphone load. They can also be used as line outputs. They can be used in and AC coupled or DC coupled (capless) configuration. The available input sources are HPMIXL/R and Vmid (see Table 32). REGISTER ADDRESS 1Ch BIT 7:6 LABEL HPL DEFAULT 00 (Vmid) DESCRIPTION HPL Source Control Output PGA 00 = VMID Mux Select 01 = No input (tri-stated if HPL is disabled in 3Eh) 10 = HPMIXL 11 = Reserved 5:4 HPR 00 (Vmid) HPR Source Control 00 = VMID 01 = No input (tri-stated if HPR is disabled in 3Eh) 10 = HPMIXR 11 = Reserved Table 32 HPL / HPR PGA Input Source The signal volume on HPL and HPR can be independently adjusted under software control by writing to register 04h. When not in use HPL and HPR can be powered down using the Powerdown register bits HPL and HPR (register 3Eh, bits [10:9]). To minimise pops and clicks when the PGA is powered down / up it is recommended that the Vmid input is selected during the power down / up cycle. This ensures the same DC level is maintained on the output pin throughout. w PP, Rev 3.3, November 2011 59 WM9713L Pre-Production REGISTER ADDRESS 04h BIT 15 LABEL MUL DEFAULT 1 (Mute) Headphone Volume DESCRIPTION HPL Mute Control 1 = Mute 0 = No mute 14 ZCL 0 HPL Zero Cross Control 1 = Zero cross enabled (change volume only on zero crossings, or after time-out) 0 = Zero cross disabled (change volume immediately) 13:8 HPLVOL 000000 HPL Volume Control (0dB) 000000 = 0dB (maximum) ... (1.5dB steps) 011111 = -46.5dB 1xxxxx = -46.5dB 7 MUR 1 (Mute) HPR Mute Control 1 = Mute 0 = No mute 6 ZCR 0 HPR Zero Cross Control 1 = Zero cross enabled (change volume only on zero crossings, or after time-out) 0 = Zero cross disabled (change volume immediately) 5:0 HPRVOL 000000 (0dB) HPR Volume Control 000000 = 0dB (maximum) ... (1.5dB steps) 011111 = -46.5dB 1xxxxx = -46.5dB Table 33 HPL / HPR PGA Control MONO OUTPUT The MONO output (pin 31) is designed to drive a 16 headphone load and can also be used as a line output. The available input sources are MONOMIX, INV1 and Vmid (see Table 34) REGISTER ADDRESS 1Ch BIT 15:14 LABEL MONO DEFAULT 00 (Vmid) DESCRIPTION MONO Source Control Output PGA 00 = VMID Mux Select 01 = No input (tri-stated if MONO is disabled in 3Eh) 10 = MONOMIX 11 = INV1 Table 34 MONO PGA Input Source The signal volume on MONO can be independently adjusted under software control by writing to register 08h. When not in use MONO can be powered down using the Powerdown register bit MONO (register 3Eh, bit 13). To minimise pops and clicks when the PGA is powered down / up it is recommended that the Vmid input is selected during the power down / up cycle. This ensures the same DC level is maintained on the output pin throughout. w PP, Rev 3.3, November 2011 60 WM9713L Pre-Production REGISTER ADDRESS 08h BIT 7 LABEL MU DEFAULT 1 (Mute) MONO Vol DESCRIPTION MONO Mute Control 1 = Mute 0 = No mute 6 ZC 0 MONO Zero Cross Control 1 = Zero cross enabled (change volume only on zero crossings, or after time-out) 0 = Zero cross disabled (change volume immediately) 5:0 MONOVOL 000000 MONO Volume Control (0dB) 000000 = 0dB (maximum) ... (1.5dB steps) 011111 = -46.5dB 1xxxxx = -46.5dB Table 35 Mono PGA Control SPEAKER OUTPUTS - SPKL AND SPKR The SPKL and SPKR (pins 35 and 36) are designed to drive a loudspeaker load down to 8 and can also be used as line outputs and headphone outputs. They are designed to drive an 8 load AC coupled or in a BTL (capless) configuration. The available input sources are HPMIXL/R, SPKMIXL/R, INV1/2 and Vmid (see Table 36). REGISTER ADDRESS 1Ch BIT 13:11 LABEL SPKL Output PGA DEFAULT 000 (Vmid) Mux Select DESCRIPTION SPKL Source Control 000 = VMID 001 = No input (tri-stated if SPKL is disabled in 3Eh) 010 = HPMIXL 011 = SPKMIX 100 = INV1 All other values are reserved 10:8 SPKR 000 (Vmid) SPKR Source Control 000 = VMID 001 = No input (tri-stated if SPKR is disabled in 3Eh) 010 = HPMIXR 011 = SPKMIX 100 = INV2 All other values are reserved Table 36 SPKL / SPKR PGA Input Source The signal volume on SPKL and SPKR can be independently adjusted under software control by writing to register 02h. When not in use SPKL and SPKR can be powered down using the Powerdown register bits SPKL and SPKR (register 3Eh, bits [8:7]). To minimise pops and clicks when the PGA is powered down / up it is recommended that the Vmid input is selected during the power down / up cycle. This ensures the same DC level is maintained on the output pin throughout. w PP, Rev 3.3, November 2011 61 WM9713L Pre-Production REGISTER ADDRESS 02h BIT 15 LABEL MUL DEFAULT 1 (Mute) Speaker DESCRIPTION SPKL Mute Control 1 = Mute Volume 0 = No mute 14 ZCL 0 SPKL Zero Cross Control 1 = Zero cross enabled (change volume only on zero crossings, or after time-out) 0 = Zero cross disabled (change volume immediately) 13:8 SPKLVOL 000000 SPKL Volume Control (0dB) 000000 = 0dB (maximum) ... (1.5dB steps) 011111 = -46.5dB 1xxxxx = -46.5dB 7 MUR 1 (Mute) SPKR Mute Control 1 = Mute 0 = No mute 6 ZCR 0 SPKR Zero Cross Control 1 = Zero cross enabled (change volume only on zero crossings, or after time-out) 0 = Zero cross disabled (change volume immediately) 5:0 SPKRVOL 000000 (0dB) SPKR Volume Control 000000 = 0dB (maximum) ... (1.5dB steps) 011111 = -46.5dB 1xxxxx = -46.5dB Table 37 SPKL / SPKR PGA Control Note: 1. For BTL speaker drive, it is recommended that both PGAs have the same gain setting. AUXILIARY OUTPUTS - OUT3 AND OUT4 The OUT3 and OUT4 outputs (pins 37 and 33) are designed to drive a loudspeaker load down to 8 and can also be used as line outputs and headphone outputs. They are designed to drive an 8 load AC coupled or in a BTL (capless) configuration and can be used as a midrail buffer to drive the headphone outputs in a capless DC configuration. The available input sources are INV1/2 and Vmid (see Table 38). REGISTER ADDRESS 1Ch BIT 3:2 LABEL OUT3 DEFAULT 00 (Vmid) DESCRIPTION OUT3 Source Control Output PGA 00 = VMID Mux Select 01 = No input (tri-stated if OUT3 is disabled in 3Eh) 10 = INV1 11 = Reserved 1:0 OUT4 00 (Vmid) OUT4 Source Control 00 = VMID 01 = No input (tri-stated if OUT4 is disabled in 3Eh) 10 = INV2 11 = Reserved Table 38 OUT3 / OUT4 PGA Input Source w PP, Rev 3.3, November 2011 62 WM9713L Pre-Production The signal volume on OUT3 and OUT4 can be independently adjusted under software control by writing to register 06h. When not in use OUT3 and OUT4 can be powered down using the Powerdown register bits OUT3 and OUT4 (register 3Eh, bits [11:12]). To minimise pops and clicks when the PGA is powered down / up it is recommended that the Vmid input is selected during the power down / up cycle. This ensures the same DC level is maintained on the output pin throughout. REGISTER ADDRESS 06h BIT 15 LABEL MU4 DEFAULT 1 (Mute) Speaker DESCRIPTION OUT4 Mute Control 1 = Mute Volume 0 = No mute 14 ZC4 0 OUT4 Zero Cross Control 1 = Zero cross enabled (change volume only on zero crossings, or after time-out) 0 = Zero cross disabled (change volume immediately) 13:8 OUT4VOL 000000 OUT4 Volume Control (0dB) 000000 = 0dB (maximum) ... (1.5dB steps) 011111 = -46.5dB 1xxxxx = -46.5dB 7 MU3 1 (Mute) OUT3 Mute Control 1 = Mute 0 = No mute 6 ZC3 0 OUT3 Zero Cross Control 1 = Zero cross enabled (change volume only on zero crossings, or after time-out) 0 = Zero cross disabled (change volume immediately) 5:0 OUT3VOL 000000 (0dB) OUT3 Volume Control 000000 = 0dB (maximum) ... (1.5dB steps) 011111 = -46.5dB 1xxxxx = -46.5dB Table 39 OUT3 / OUT4 PGA Control THERMAL SENSOR The speaker and headphone outputs can drive very large currents. To protect the WM9713L from becoming too hot, a thermal sensor has been built in. If the chip temperature reaches approximately 150C, and the TSHUT bit is cleared, and the GP11 bit is set, the WM9713L deasserts TI, a virtual GPIO that can be set up to generate an interrupt to the CPU (see "GPIO and Interrupt Control" section). w PP, Rev 3.3, November 2011 63 WM9713L Pre-Production REGISTER ADDRESS BIT 3Ch 13 LABEL TSHUT DEFAULT DESCRIPTION 1 (disabled) Thermal Sensor Disable Control 1 Thermal Sensor Polarity Control 1 = Disabled 0 = Enabled 4Eh 11 GP11 1 = Active Low 0 = Active High 54h 11 TI 0 Thermal Sensor Status Bit (Virtual GPIO) See also "GPIO and Interrupt Control" section. GP11 = 1 (default) GP11 = 0 1 = Temp < 150C 1 = Temp > 150C 0 = Temp > 150C 0 = Temp < 150C Table 40 Thermal Shutdown Control w PP, Rev 3.3, November 2011 64 WM9713L Pre-Production JACK INSERTION AND AUTO-SWITCHING In a phone application, a BTL ear speaker may be connected across MONO and HPL, a stereo headphone on HPL and HPR and stereo speakers on SPKL, SPKR, OUT3 and OUT4 (see Figure 23). Typically, only one of these three output devices is used at any given time: when no headphone is plugged in, the BTL ear speaker or stereo speakers are active, otherwise the headphone is used. Figure 23 Typical Output Configuration The presence of a headphone can be detected using one of GPIO1/6/7/8 (pins 44, 3, 11 & 12) and an external pull-up resistor (see Figure 43, page 132 for a circuit diagram). When the jack is inserted, the GPIO is pulled low by a switch on the socket. When the jack is removed the GPIO is pulled high by a resistor. If the JIEN bit is set, the WM9713L automatically switches between headphone and any other output configuration, typically ear speaker or stereo speaker that has been set up in the Powerdown and Output PGA Mux Select registers. Note: Please refer to WAN_0182 for further information on jack detect configuration. In addition to the typical configuration explained above, the WM9713L can also support automatic switching between the following three configurations set as BTL ear speaker and headphone. REGISTER ADDRESS 24h BIT 1:0 LABEL EARSPKSEL Output Volume Mapping (Jack Insert) DEFAULT 00 DESCRIPTION Ear Speaker Source Control 00 = Default, no ear speaker configuration selected. 01 = MONO and HPL driver selected as BTL ear speaker. 10 = OUT3 and HPL driver selected as BTL ear speaker. 11 = OUT4 and HPL driver selected as BTL ear speaker. Table 41 Ear Speaker Configuration For example if OUT4 and HPL is selected as the BTL ear speaker, the user should select EARSPKSEL = 3h, then OUT4 is tri-stated on jack insert to prevent sound across the ear speaker during headphone operation and HPL volume is set to OUT4 volume on jack out to ensure correct ear speaker operation. It should be noted that all other outputs except HPL, HPR and selected ear w PP, Rev 3.3, November 2011 65 WM9713L Pre-Production speaker driver are disabled and internally connected to VREF on jack insert. This maintains VREF at those outputs and helps prevent pops when the outputs are enabled. Finally if the user wishes to DC couple the headphone outputs the user needs to select between OUT3 and OUT4 as the mid-rail output buffer driver. The selected mid-rail output buffer is enabled on jack insert. On jack out it defaults to whatever configuration has been set up in the Powerdown and Output PGA Mux Select registers. REGISTER ADDRESS BIT 24h 3:2 LABEL DEFAULT DCDRVSEL 00 Output Volume Mapping (Jack Insert) DESCRIPTION Jack Insert Headphone DC Reference Control 00 = AC coupled headphones, no DC source 01 = OUT3 is mid-rail output buffer 10 = Reserved 11 = OUT4 is mid-rail output buffer Table 42 DC Coupled Headphone Configuration In summary: JIEN not set: Outputs work as normal as selected in the Powerdown and Output PGA Mux Select registers. JIEN set: On jack insert GPIO1/6/7/8 is pulled low, HPL and HPR are enabled, DCDRVSEL decides if the headphones are DC or AC coupled and configures OUT3 or OUT4 to suit, EARSPKSEL decides if MONO, OUT3 or OUT4 need to be tri-stated to ensure no sound out on the ear-speaker and finally all other outputs are disabled as explained above to prevent pops on re-enabling. On jack out GPIO1/6/7/8 is pulled high, the outputs work as normal as selected in the Powerdown and Output PGA Mux Select registers except that HPL Volume is controlled by EARSPKSEL to ensure correct ear speaker operation. REGISTER ADDRESS BIT 24h Output Volume Mapping (Jack Insert) 4 5Ah Additional Functions (1) 7:6 LABEL DEFAULT JIEN 0 (OFF) DESCRIPTION Jack Insert Control 0 = Disable jack insert circuitry 1 = Enable jack insert circuitry JSEL 00 (GPIO1) Jack Detect Pin Input Control 00 = GPIO1 01 = GPIO6 10 = GPIO7 11 = GPIO8 Table 43 Jack Insertion / Auto-Switching (1) w PP, Rev 3.3, November 2011 66 SPKR STATE User Controlled HZ HZ HZ HZ User Controlled User Controlled HZ User Controlled HZ HZ HZ HZ User Controlled User Controlled HZ OUT4 STATE User Controlled HZ HZ HZ Tri-Stated User Controlled User Controlled Tri-Stated OUT3 STATE User Controlled HZ HZ Tri-Stated HZ User Controlled User Controlled VMID MONO STATE User Controlled HZ Tri-Stated HZ HZ GPIO1 OUT4 Ear Speaker Selected. HZ Jack Insert Detection Enabled. Headphone plugged out. User Controlled 1 User Controlled XX HPR VOLUME 11 User Controlled 1 HPR Volume Jack Insert Detection Enabled. Headphone plugged out. No Ear Speaker Selected. HPR Volume 1 HPR Volume XX HPR Volume 00 HPR Volume 1 User Controlled Jack Insert Detection Enabled. Headphone plugged in. OUT4 Ear Speaker Selected. OUT3 DC Coupled Headphone Selected. User Controlled 0 HPR STATE 01 User Controlled 11 Enabled 1 Enabled Jack Insert Detection Enabled. Headphone plugged in. OUT4 Ear Speaker Selected. AC Coupled Headphone Selected. Enabled 0 Enabled 00 Enabled 11 User Controlled 1 User Controlled Jack Insert Detection Enabled. Headphone plugged in. OUT3 Ear Speaker Selected. AC Coupled Headphone Selected. HPL VOLUME 0 User Controlled 00 HPL Volume 10 HPL Volume 1 HPL Volume Jack Insert Detection Enabled. Headphone plugged in. MONO Ear Speaker Selected. AC Coupled Headphone Selected. HPL Volume 0 HPL Volume 00 User Controlled 01 OUT4 Volume 1 HPL STATE Jack Insert Detection Enabled. Headphone plugged in. No Ear Speaker Selected. AC Coupled Headphone Selected. User Controlled 0 Enabled 00 Enabled 00 Enabled 1 Enabled Jack Insert Detection Disabled. Enabled X User Controlled DCDRVSEL XX User Controlled EARSPKSEL XX JIEN 0 MODE DESCRIPTION SPKL STATE WM9713L Pre-Production Table 44 Jack Insertion / Auto-Switching (2) w PP, Rev 3.3, November 2011 67 WM9713L Pre-Production DIGITAL AUDIO (S/PDIF) OUTPUT The WM9713L supports the S/PDIF standard. Pins 48 & 12 can be used to output the S/PDIF data. Note that pins 48 & 12 can also be used as GPIO pins. The GE5 & GE8 bits (register 56h, bit 5 & bit 8) select between GPIO and S/PDIF functionality for pins 48 & 12 respectively (see "GPIO and Interrupt control" section). Register 3Ah is a read/write register that controls S/PDIF functionality and manages bit fields propagated as channel status (or sub-frame in the V case). With the exception of V, this register should only be written to when the S/PDIF transmitter is disabled (S/PDIF bit in register 2Ah is `0'). Once the desired values have been written to this register, the contents should be read back to ensure that the sample rate in particular is supported, then S/PDIF validity bit SPCV in register 2Ah should be read to ensure the desired configuration is valid. Only then should the S/PDIF enable bit in register 2Ah be set. This ensures that control and status information start up correctly at the beginning of S/PDIF transmission. w PP, Rev 3.3, November 2011 68 WM9713L Pre-Production REGISTER ADDRESS 2Ah BIT 10 LABEL SPCV DEFAULT 0 Extended Audio DESCRIPTION S/PDIF Validity Bit (Read Only) 1 = Valid 0 = Not valid 5:4 SPSA 01 S/PDIF Slot Assignment Control 00 = Slots 3 and 4 01 = Slots 6 and 9 10 = Slots 7 and 8 11 = Slots 10 and 11 Note: This control is only valid when ADCO=0 in 5Ch 2 SEN 0 S/PDIF Output Enable Control 1 = Enabled 0 = Disabled 3Ah S/PDIF Control Register 15 V 0 S/PDIF Validity Bit 1 = Valid 0 = Not valid 14 DRS 0 Indicates that the WM9713L does not support double rate S/PDIF output (read-only) 13:12 SPSR 10 Indicates that the WM9713L only supports 48kHz sampling on the S/PDIF output (readonly) 11 L 0 S/PDIF L-bit Control 10:4 CC 0000000 Programmed as required by user S/PDIF Category Code Control Category code; programmed as required by user 3 PRE 0 S/PDIF Pre-emphasis Indication Control 0 = no pre-emphasis 1 = 50/15s pre-emphasis 2 COPY 0 S/PDIF Copyright Indication Control 0 = Copyright not asserted 1 = Copyright asserted 1 AUDIB 0 S/PDIF Non-audio Indication Control 0 = PCM data 1 = Non-PCM data (e.g. DD or DTS) 0 PRO 0 S/PDIF Professional Indication Control 0 = Consumer mode 1 = Professional mode 5Ch 4 ADCO Additional Function Control 0 S/PDIF Data Source Control 0 = From SDATAOUT (pin 5) 1 = Output from audio ADC Note: Slot selected by SPSA in 2Ah Table 45 S/PDIF Output Control w PP, Rev 3.3, November 2011 69 WM9713L Pre-Production TOUCHPANEL INTERFACE The WM9713L includes a touchpanel driver and digitiser circuit for use with 4-wire or 5-wire resistive touchpanels. The following functions are implemented: X co-ordinate measurement Y co-ordinate measurement Pen down detection, with programmable sensitivity Touch pressure measurement (4-wire touchpanel only) Auxiliary measurement from COMP1/AUX1 (pin 29), COMP2/AUX2 (pin 30), or WIPER/AUX4 (pin 12) The touchpanel digitiser uses a very low power, 12-bit successive approximation type ADC. The same ADC can also be used for battery and auxiliary measurements (see the "Battery Alarm and Battery Measurement" and "Auxiliary ADC Inputs" sections). An on-chip switch matrix connects each touchpanel terminal to the supply voltage TPVDD, to ground (TPGND), or to the ADC input, as required. Figure 24 Touchpanel Switch Matrix w PP, Rev 3.3, November 2011 70 WM9713L Pre-Production PRINCIPLE OF OPERATION - FOUR-WIRE TOUCHPANEL Four-wire touchpanels are connected to the WM9713L as follows: Right side contact = X+ (pin 14) Left side contact = X- (pin 16) Top side contact = Y+ (pin 15) Bottom side contact = Y- (pin 17) The principle of operation is illustrated below (Note: the illustrations assume that the top plate is used for X and the bottom plate for Y measurements, although the reverse is also possible). Figure 25 X Co-ordinate Measurement on 4-wire Touchpanel For an X co-ordinate measurement, the X+ pin is internally switched to TPVDD and X- to TPGND. The X plate becomes a potential divider, and the voltage at the point of contact is proportional to its X co-ordinate. This voltage is measured on the Y+ and Y- pins, which carry no current (hence there is no voltage drop in RY+ or RY-). Due to the ratiometric measurement method, the supply voltage does not affect measurement accuracy. The voltage references VREF+ and VREF- are taken from after the matrix switches, so that any voltage drop in these switches has no effect on the ADC measurement. Figure 26 Y Co-ordinate Measurement on 4-wire Touchpanel Y co-ordinate measurements are similar to X co-ordinate measurements, with the X and Y plates interchanged. w PP, Rev 3.3, November 2011 71 WM9713L Pre-Production Figure 27 Pen Down Detection on 4-wire Touchpanel Pen down detection uses a zero power comparator (effectively a CMOS logic gate) with an internal, programmable pull-up resistor RPU that controls pen-down sensitivity. Increasing RPU makes the touchpanel less sensitive to touch, while lowering RPU makes it more sensitive. When the touchpanel is not being touched, no current flows in the circuit, and the PENDOWN signal is low. When the panel is touched with a pen or finger, current flows through RPU and the panel, and the comparator output goes high. The PENDOWN signal can be read from bit 15 in register 7Ah (labeled PNDN). It can also be observed on pin 46 (GPIO3 / PENDOWN), if the pin is not used for GPIO (GE3=0). Additionally, PENDOWN is passed to the GPIO logic block (register 54h, bit 13), where it can generate CPU interrupts, and / or to wake up the WM9713L from sleep mode (see "GPIO and Interrupt Control" section). Figure 28 Touch Pressure Measurement on 4-wire Touchpanel Touch pressure can be determined indirectly by measuring the contact resistance RC between the top and bottom plates. RC decreases as the touch pressure on the panel increases. The WM9713L measures RC by sending a constant current IP through the touchpanel and measuring the potential on each plate. The two values are subtracted in the digital domain to obtain the potential difference, which is proportional to RC. To suit different types of touchpanels, the magnitude of IP can be set to either 400A or 200A using the PIL control bit. w PP, Rev 3.3, November 2011 72 WM9713L Pre-Production PRINCIPLE OF OPERATION - FIVE-WIRE TOUCHPANEL Five-wire touchpanels are connected to the WM9713L as follows: Top sheet contact = WIPER/AUX4 (pin 12) Top left corner of bottom sheet = TL (pin 16) Top right corner of bottom sheet = TR (pin 15) Bottom left corner of bottom sheet = BL (pin 17) Bottom right corner of bottom sheet = BR (pin 14) Figure 29 X Co-ordinate Measurement on 5-wire Touchpanel For an X co-ordinate measurement, the top left and bottom left corners of the touchpanel are grounded internally to the WM9713L, while the top right and bottom right contacts are connected to TPVDD. The bottom plate becomes a potential divider with a voltage gradient in the X direction. The voltage at the point of contact is proportional to its X co-ordinate. This voltage is measured on the WIPER pin and converted to a digital value by the ADC. Due to the ratiometric measurement method, the supply voltage does not affect measurement accuracy. The voltage references VREF+ and VREF- are taken from after the matrix switches, so that any voltage drop in these switches has no effect on the ADC measurement. Figure 30 Y Co-ordinate Measurement on 5-wire Touchpanel w PP, Rev 3.3, November 2011 73 WM9713L Pre-Production Y co-ordinate measurements are similar to Y co-ordinate measurements. However, the voltage gradient on the bottom plate is in the Y direction instead of the X direction. This is achieved by grounding the bottom left and bottom right corners of the touchpanel, and connecting the top left and top right contacts to TPVDD. Figure 31 Pen Down Detection on 5-wire Touchpanel Pen down detection works in a similar fashion for both 4-wire and 5-wire touchpanels (see Four-Wire Touchpanel Operation). On a 5-wire touchpanel, all four contacts of the bottom plate are grounded, and the top plate contact is connected to the internal programmable pull-up resistor, RPU. w PP, Rev 3.3, November 2011 74 WM9713L Pre-Production CONTROLLING THE TOUCHPANEL DIGITISER All touchpanel functions are accessed and controlled through the AC-Link interface. PHYSICAL CHARACTERISTICS The physical characteristics of the touchpanel interface are controlled through register 78h, as shown below. REGISTER ADDRESS 78h BIT 12 LABEL 45W DEFAULT 0 (4-wire) DESCRIPTION Touchpanel Type Control 0 = 4-wire 1 = 5-wire 8 PIL 0 (200A) Pressure Measurement Current Control 0 = IP = 200A 1 = IP = 400A 0:5 RPU 000001 Internal Pull-up Resistor Control (64k) 000000 = Reserved 000001 = 64k/1 (most sensitive) 000010 = 64k/2 000011 = 64k/3 ... (64k/binary value of RPU) 111111 = 64k/63 (least sensitive) Note: used to adjust sensitivity of Pen Down detection Table 46 Touchpanel Digitiser Control (Physical Characteristics) POWER MANAGEMENT To save power, the touchpanel digitiser and the pen-down detector can be independently disabled when they are not used. The power consumption of the pen-down detector is normally negligible, except when the pen is down. The pen ADC is powered-down using PADCPD, register 3Ch bit 15. The state of the digitiser and pen down detector is controlled by the following bits. REGISTER ADDRESS 3Ch BIT 15 LABEL PADCPD DEFAULT 1 = off DESCRIPTION Touchpanel / AUXADC Disable Control 1 = Disabled 0 = Enabled 78h 15:14 PRP 00 Touchpanel Digitiser Power State Control 00 = Pen digitiser off, pen detect off, no wake-up on pen down (default) 01 = Pen digitiser powered off, pen detect enabled, touchpanel digitiser wakes up (changes to state 11) on pen-down 10 = Pen digitiser off, pen detect enabled, no wake-up on pen down 11 = Pen digitiser and pen detect enabled 13 RPR 0 Pen Detect Wake-up Mode Control 0 = Wake-up the AC-Link only (hold SDATAIN high until controller sends warm reset or cold reset) 1 = Wake-up the WM9713L without waiting for a reset signal from the controller Table 47 Touchpanel Digitiser Control (Power Management) w PP, Rev 3.3, November 2011 75 WM9713L Pre-Production INITIATION OF MEASUREMENTS The WM9713L touchpanel interface supports both polling routines and DMA (direct memory access) to control the flow of data from the touchpanel ADC to the host CPU. In a polling routine, the CPU starts each measurement individually by writing to the POLL bit (register 74h, bit 9). This bit automatically resets itself when the measurement is completed. REGISTER ADDRESS 74h BIT 9 LABEL POLL DEFAULT 0 DESCRIPTION Poll Measurement Control Writing "1" initiates a measurement (when CTC=0) 8 CTC 0 AUXADC Measurement Mode 0 = Polling mode 1 = Continuous mode (for DMA) 76h 9:8 CR 00 Continuous Mode Conversion Rate Continuous mode rate (DEL 1111) 00: 93.75 Hz (every 512 AC-Link frames) 01: 120 Hz (every 400 AC-Link frames) 10: 153.75 Hz (every 312 AC-Link frames) 11: 187.5Hz (every 256 AC-Link frames) Continuous mode "fast rate" (DEL = 1111) 00: 8 kHz (every six AC-Link frames) 01: 12 kHz (every four AC-Link frames) 10: 24 kHz (every other AC-Link frame) 11: 48 kHz (every AC-Link frame) Note: PENDIV bits in 44h [5:3] should be set to 111 in 48kHz mode to ensure that samples occur synchronously on the AC97 data channel 78h 11 PDEN 0 Touchpanel Measurement Pen Status Control 0 = Measure regardless of pen status 1 = Measure only when pen is down (when CTC=0 and POLL=1, measurement is delayed until pen-down; when CTC=1, measurements are stopped on pen-up) 10 PDPOL 0 PENDOWN Polarity Control 0 = Normal 1 = Inverted Table 48 Touchpanel Digitiser Control (Initiation of Measurements) In continuous mode (CTC = 1), the WM9713L autonomously initiates measurements (or sets of measurements) at the rate set by CR, and supplies the measured data to the CPU on one of the unused AC'97 time slots. DMA-enabled CPUs can write the data directly into a FIFO without any intervention by the CPU core. This reduces CPU loading and speeds up the execution of user programs in handheld systems. Note that the measurement frequency in continuous mode is also affected by the DEL bits (see "Touchpanel Settling Time"). The faster rates achieved when DEL = 1111 may be useful when the ADC is used for auxiliary measurements. w PP, Rev 3.3, November 2011 76 WM9713L Pre-Production MEASUREMENT TYPES The ADCSEL control bits determine which type of measurement is performed (see below). REGISTER ADDRESS BIT 74h 7 LABEL ADCSEL_AUX4 DEFAULT 0 DESCRIPTION AUX4 Measurement Enable Control 0 = Disable AUX4 measurement (pin 12) 1 = Enable AUX4 measurement (pin 12) 6 ADCSEL_AUX3 0 AUX3 Measurement Enable Control 0 = Disable AUX3 measurement (SPKVDD/3) 1 = Enable AUX3 measurement (SPKVDD/3) 5 ADCSEL_AUX2 0 AUX2 Measurement Enable Control 0 = Disable AUX2 measurement (pin 30) 1 = Enable AUX2 measurement (pin 30) 4 ADCSEL_AUX1 0 AUX1 Measurement Enable Control 0 = Disable AUX1 measurement (pin 29) 1 = Enable AUX1 measurement (pin 29) 3 ADCSEL_PRESSURE 0 Pressure Measurement Enable Control 0 = Disable pressure measurement 1 = Enable pressure measurement 2 ADCSEL_Y 0 Y Co-ordinate Measurement Enable Control 0 = Disable Y co-ordinate measurement 1 = Enable Y co-ordinate measurement 1 ADCSEL_X 0 X Co-ordinate Measurement Enable Control 0 = Disable X co-ordinate measurement 1 = Enable X co-ordinate measurement 0 COO 0 Co-ordinate Mode Control 0 = Single measurement 1 = Co-ordinate measurement Table 49 Touchpanel Digitiser Control (Measurement Types) When COO is `0', the WM9713L performs a single measurement - either in polling mode or continuously, as indicated by the CTC bit. The type of measurement is specified by the ADCSEL[7:1] bits. If CTC=0 (polling mode) then only one of the ADCSEL[7:1] bits should be set. If operating in continuous mode (CTC=1), then more than one ADCSEL[7:1] bit may be set and selected conversions will be performed cyclically in the following order => "X,Y,PRESSURE,AUX1,AUX2,AUX3,AUX4..." The co-ordinate mode (COO = `1') makes it easier to obtain co-ordinate pairs rather than single coordinates. In polling-coordinate mode (CTC = `0', COO = `1'), the WM9713L performs an X coordinate, then a Y co-ordinate, followed by a single additional measurement determined by ADCSEL[7:1], then stops. In continuous-coordinate mode (CTC = `1', COO = `1'), the WM9713L continuously repeats a sequence consisting of an X-co-ordinate,Y co-ordinate, then an additional measurement determined by ADCSEL[7:1]. At least one of the ADCSEL bits must be set in continuous coordinate mode when CTC = COO = 1). Should more than one of the ADCSEL[7:1] bits be set during continuous co-ordinate mode then the additional measurement alternates for every set of three measurements. For example if ADCSEL_AUX1 and ADCSEL_AUX3 were both selected whilst CTC = `1', COO = `1' then the following sequence of conversions would be performed: "X,Y,AUX1,X,Y,AUX3,X,Y,AUX1,X,Y,AUX3..." w PP, Rev 3.3, November 2011 77 WM9713L Pre-Production CONVERSION RATE As stated previously the conversion rate is specified by the CR bits (reg 76h). CR may be set to 93.75Hz (every 512 AC-Link Frames), 120Hz (every 400 AC-Link Frames), 153.75Hz (every 312 AC-Link frames) or 187.5Hz (every 256 AC-Link frames). If only one ADRSEL[7:1] bit is set then each individual conversion occurs at the rate specified by CR. If multiple ADRSEL[7:1] bits are set then the complete set of conversions requested is completed at the rate specified by CR. DATA READBACK This data is stored in register 7Ah, and can be retrieved by reading the register in the usual manner (see AC-Link Interface section). Additionally, the data can also be passed to the controller on one of the AC-Link time slots not used for audio functions. The output data word of the touchpanel interface consists of three parts: Pen Status (1 bit) - this is also passed to the GPIO logic block, which can be programmed to generate an interrupt and/or wake up the WM9713L on pen down (see GPIO and Interrupt Control). Output data from the touchpanel ADC (12 bits) ADCSRC: 3 additional bits that indicate the source of the ADC data. In co-ordinate mode (COO = `1'), the WM9713L schedules different types of measurements autonomously and so these register bits may be required. If the data is being read back using the polling method, there are several ways to determine when a measurement has finished: Reading back the POLL bit. If it has been reset to `0', then the measurement has finished. Monitoring the ADA signal, see GPIO and interrupt section. ADA goes high after every single conversion. If operating in co-ordinate mode (COO=1) then ADA goes high after every group of 3 conversions. Reading back 7Ah until the new data appears REGISTER ADDRESS 7Ah BIT 15 LABEL PNDN DEFAULT 0 or AC-Link slot selected by SLT DESCRIPTION Pen Status (Read-only) 0 = Pen up 1 = Pen down 14:12 ADCSRC 000 Touchpanel ADC Source 000 = No measurement 001 = X co-ordinate measurement 010 = Y co-ordinate measurement 011 = Pressure measurement (4-wire only) 100 = COMP1/AUX1 measurement (pin 29) 101 = COMP2/AUX2 measurement (pin 30) 110 = AUX3 measurements (SPKVDD/3) 111 = WIPER/AUX4 measurement (pin 12) 11:0 ADCD 000h Touchpanel ADC Data (Read-only) Bit 0 = LSB Bit 11 = MSB 78h 9 WAIT 0 Touchpanel ADC Data Control 0 = Overwrite existing data in 7Ah with new data 1 = Retain existing data in 7Ah until it is read Table 50 Touchpanel Digitiser Data w PP, Rev 3.3, November 2011 78 WM9713L Pre-Production When operating in co-ordinate mode (COO=1) there will be 3 results to read back from each set of measurements - namely X,Y and the third additional measurement. After the co-ordinate set has finished the X result will be present in register 7Ah. Once this has been read back by the user the Y result will overwrite register 7Ah, as indicated by ADCSRC. Finally, after the Y result has been read back, the result of the third, additional, measurement will become present in 7Ah, again indicated by ADCSRC. To avoid losing data that has not yet been read, the WM9713L can delay overwriting register 7Ah with new conversions until the old data has been read. This function is enabled using the WAIT bit, and applies to both single and co-ordinate conversion mode. The flow diagram in Figure 32 shows the timing of touchpanel conversions, and data readback from register 7Ah dependent on the individual settings of the COO, POLL,ADCSEL and CTC bits. POLL (74h) Starts a single measurement CTC (74h) Starts a co-ordinate measurement at specified conversion rate COO (74h) Enables Co-ordinate mode ADCSEL (74H) Specifies the type of measurement to be made Figure 32 Touchpanel Conversion Flow Diagram If the SLEN bit is set to `1', then the touchpanel data appears on the AC-Link slot selected by the SLT control bits, as shown below. The Slot 0 `tag' bit corresponding to the selected time slot is asserted whenever there is new data on that slot. w PP, Rev 3.3, November 2011 79 WM9713L Pre-Production REGISTER ADDRESS 76h BIT 3 LABEL SLEN DEFAULT 0 DESCRIPTION Slot Readback Enable Control 0 = Disabled (readback through register map only) 1 = Enabled (readback slot selected by SLT) 2:0 SLT 110 AC'97 Slot for Touchpanel Data Control 000 = Slot 5 001 = Slot 6 010 = Slot 7 011 = Slot 8 100 = Slot 9 101 = Slot 10 110 = Slot 11 111 = Reserved Table 51 Returning Touchpanel Data Through an AC-Link Time Slot w PP, Rev 3.3, November 2011 80 WM9713L Pre-Production TOUCHPANEL SETTLING TIME For accurate touchpanel measurements, some settling time may be required between the switch matrix applying a voltage across the touchpanel plate and the ADC sampling the signal. This time delay function is built into the WM9713L and can be programmed as shown below. REGISTER ADDRESS 76h BIT LABEL 7:4 DEL DEFAULT DESCRIPTION 0000 Touchpanel Settling Time Control (1 frame) See Table 53 for details Table 52 Touchpanel Settling Time Control (1) DEL DELAY DELAY (AC-LINK FRAMES) (TIME) 0000 1 20.8s 0001 2 41.7s 0010 4 83.3s 0011 8 167s 0100 16 333s 0101 32 667s 0110 48 1ms 0111 64 1.33ms 1000 96 2ms 1001 128 2.67ms 1010 160 3.33ms 1011 192 4ms 1100 224 4.67ms 1101 256 5.33ms 1110 288 6ms 1111 No delay, switch matrix always on Table 53 Touchpanel Settling Time Control (2) The total time for co-ordinate or auxiliary measurements to complete is the delay time DEL, plus one AC-Link frame (20.8s). For a pressure measurement, the time taken is DEL plus two AC-Link frames (41.6s). Although the DELAY is variable the maximum value that may be programmed depends on the number of ADCSEL[7:1] bits set, as shown in the following table. Setting multiple ADCSEL[7:1] bits leaves less spare AC_Link frames for the DELAY. w PP, Rev 3.3, November 2011 81 WM9713L Pre-Production NUMBERS OF ADCSEL[1:7] BITS SET CR SETTING MAX DELAY SETTING 1 00 (93.75Hz) 288 1 01 (120Hz) 288 1 10 (153.75Hz) 288 1 11 (187.5Hz) 256 2 00 (93.75Hz) 256 2 01 (120Hz) 192 2 10 (153.75Hz) 128 2 11 (187.5Hz) 128 3, 4 00 (93.75Hz) 96 3, 4 01 (120Hz) 96 3, 4 10 (153.75Hz) 64 3, 4 11 (187.5Hz) 48 5,6,7 00 (93.75Hz) 48 5,6,7 01 (120Hz) 48 5,6,7 10 (153.75Hz) 32 5,6,7 11 (187.5Hz) 16 1 (if COO=1) 00 (93.75Hz) 224 1 (if COO=1) 01 (120Hz) 192 1 (if COO=1) 10 (153.75Hz) 128 1 (if COO=1) 11 (187.5Hz) 96 2,3,4,5,6,7 00 (93.75Hz) 160 01 (120Hz) 128 10 (153.75Hz) 96 11 (187.5Hz) 64 (if COO=1) 2,3,4,5,6,7 (if COO=1) 2,3,4,5,6,7,8 (if COO=1) 2,3,4,5,6,7,8 (if COO=1) Table 54 Maximum Delay Values Setting DEL to `1111' reduces the settling time to zero, i.e. measurements begin immediately. This mode is intended for fast sampling on AUX inputs. It is NOT intended for touchpanel digitisation. There are several side-effects when DEL is set to `1111': w Co-ordinate mode does not work, i.e. the WM9713L behaves as if COO = 0, even if COO = 1 (see "Measurement Types") If X / Y co-ordinate or touch pressure measurements are selected (ADCSEL = 001, 010 or 011), then the switch matrix is constantly on, and current constantly flows in the touchpanel. This increases power consumption in the system, and is therefore not recommended for battery powered systems In continuous mode (CTC = 1), setting DEL = 1111 increases the sampling rate of the touchpanel ADC (see "Initiation of Measurements") PP, Rev 3.3, November 2011 82 WM9713L Pre-Production MASK INPUT CONTROL Sources of glitch noise, such as the signals driving an LCD display, may feed through to the touchpanel plates and affect measurement accuracy. In order to minimise this effect, a signal may be applied to MASK (pin 47 / pin 3) to delay or synchronise the sampling of any input to the ADC. The effect of the MASK signal depends on the MSK bits of register 78h (bits [7:6]), as described below. REGISTER ADDRESS 78h BIT 7:6 LABEL MSK DEFAULT 00 DESCRIPTION Mask Input Control see Table 56 for details Table 55 MASK Input Control MSK[1-0] EFFECT OF SIGNAL ON MASK PIN 00 Mask has no effect on conversions GPIO input disabled (default) 01 Static; `hi' on MASK pin stops conversions, `lo' has no effect. 10 Edge triggered; rising or falling edge on MASK pin delays conversions by an amount set in the DEL[3-0] register. Conversions are asynchronous to the MASK signal. 11 Synchronous mode; conversions wait until rising or falling edge on MASK initiates cycle; screen starts to be driven when the edge arrives, the conversion sample being taken a period set by DEL[3-0] after the edge. Table 56 Controlling the MASK Feature Note that pin 47 / pin 3 can also be used as a GPIO (see "GPIO and Interrupt Control" section), or to output the ADA signal (see below). THE ADA SIGNAL Whenever data becomes available from the touchpanel ADC, the internal ADA (ADC Data Available) signal goes high and remains high until the data has been read from register 7Ah (if SLEN = 0) or until it has been sent out on an AC-Link slot (if SLEN = 1). ADA goes high either After every touchpanel ADC conversion (in normal mode, COO=0) After every set of 3 conversions (co-ordinate mode, COO=1) ADA can be used to generate an interrupt, if the AW bit (register 52h, bit 12) is set (see "GPIO and interrupt control" section) It is also possible to output the ADA signal on pin 47 / pin 3, if this pin is not used as a GPIO. The GE4/6 bit must be set to `0' to achieve this (see "GPIO and interrupt control" section). Alternatively, ADA can be read from bit 12 in register 54h. w PP, Rev 3.3, November 2011 83 WM9713L Pre-Production ADDITIONAL FEATURES AUXILIARY ADC INPUTS The ADC used for touchpanel digitisation can also be used for the sole purpose of auxiliary measurements, provided that it is enabled (register 78h, PRP = 11). The WM9713L has three pins that can be used as auxiliary ADC inputs: MIC2A / COMP1 / AUX1 (pin 29) MIC2B / COMP2 / AUX2 (pin 30) WIPER / AUX4 (pin 12) Additionally, the speaker supply (SPKVDD) can be used as an auxiliary ADC input through an on-chip potential divider giving an input to the auxiliary ADC of SPKVDD/3. This input is referred to as the AUX3 input (see Figure 24). Note that pin 12 connects to the wiper of a 5-wire touchpanel wiper function. Auxiliary measurements taken on pin 12 are only meaningful when it is not connected to a touchpanel (i.e. a 4-wire touchpanel, or no touchpanel at all, is used). Pins 29 and 30 are also used as comparator inputs (see Battery Alarm and Battery Measurement), but auxiliary measurements can still be taken on these pins at any time. The ADCSEL control bits select between different ADC inputs, as shown in Table 57. The ADCSEL control bits determine which type of measurement is performed (see below). When performing auxiliary conversions the co-ordinate mode bit, COO, should be off (0). If CTC=0 then only one of the ADCSEL[7:1] bits should be set. If operating in continuous mode (CTC=1), then more than one ADCSEL[7:1] bit may be set, and conversions will be performed cyclically in the following order => "AUX1,AUX2,AUX3,AUX4..." - dependent on which bits are set. BIT LABEL DEFAULT 7 ADCSEL_AUX4 0 DESCRIPTION REGISTER ADDRESS 74h AUX4 Measurement Enable Control 0 = Disable AUX4 measurement (pin 12) 1 = Enable AUX4 measurement (pin 12) 6 ADCSEL_AUX3 0 AUX3 Measurement Enable Control 0 = Disable AUX3 measurement (SPKVDD/3) 1 = Enable AUX3 measurement (SPKVDD/3) 5 ADCSEL_AUX2 0 AUX2 Measurement Enable Control 0 = Disable AUX2 measurement (pin 30) 1 = Enable AUX2 measurement (pin 30) 4 ADCSEL_AUX1 0 AUX1 Measurement Enable Control 0 = Disable AUX1 measurement (pin 29) 1 = Enable AUX1 measurement (pin 29) 0 COO 0 Co-ordinate Mode Control 0 = Single measurement 1 = Co-ordinate measurement Note: When not measuring a touchpanel, set COO=0 Table 57 Auxiliary ADC Measurements Auxiliary ADC measurements are initiated in the same way as touchpanel measurements, and the data is returned in the same manner. Please refer to the "Controlling the Touchpanel Interface" section. w PP, Rev 3.3, November 2011 84 WM9713L Pre-Production BATTERY ALARM AND ANALOGUE COMPARATORS The battery alarm function differs from battery measurement in that it does not actually measure the battery voltage. Battery alarm only indicates "OK", "Low" or "Dead". The advantage of the battery alarm function is that it does not require a clock and can therefore be used in low-power sleep or standby modes. Figure 33 Battery Alarm Example Schematic The typical schematic for a dual threshold battery alarm is shown above. This alarm has two thresholds, "dead battery" (COMP1) and "low battery" (COMP2). R1, R2 and R3 set the threshold voltages. Their values can be up to about 1M in order to keep the battery current [IALARM = VBATT / (R1+R2+R3)] to a minimum (higher resistor values may affect the accuracy of the system as leakage currents into the input pins become significant). Dead battery alarm: COMP1 triggers when VBATT < VREF (R1+R2+R3) / (R2+R3) A dead battery alarm is the highest priority of interrupt in the system. It should immediately save all unsaved data and shut down the system. The GP15, GS15 and GW15 bits must be set to generate this interrupt. Low battery alarm: COMP2 triggers when VBATT < VREF (R1+R2+R3) / R3 A low battery alarm has a lower priority than a dead battery alarm. Since the threshold voltage is higher than for a dead battery alarm, there is enough power left in the battery to give the user a warning and/or shut down "gracefully". When VBATT gets close to the low battery threshold, spurious alarms are filtered out by the COMP2 delay function. The purpose of the capacitor C is to remove from the comparator inputs any high frequency noise or glitches that may be present on the battery (for example, noise generated by a charge pump). It forms a low pass filter with R1, R2 and R3. Low pass cutoff fc [Hz] = 1/ (2 C (R1 || (R2+R3))) Provided that the cutoff frequency is several orders of magnitude lower than the noise frequency fn, this simple circuit can achieve excellent noise rejection. Noise rejection [dB] = 20 log (fn / fc) The circuit shown above also allows for measuring the battery voltage VBATT. This is achieved simply by setting the touchpanel ADC input to be either COMP1 (ADCSEL = 100) or COMP2 (ADCSEL = 101) (see also Auxiliary ADC Inputs). w PP, Rev 3.3, November 2011 85 WM9713L Pre-Production The WM9713L has two on-chip comparators that can be used to implement a battery alarm function, or other functions such as a window comparator. Each comparator has one of its inputs tied to COMP1 (pin 29) or COMP2 (pin 30), and the other tied to a voltage reference. The voltage reference can be either internally generated (VREF = AVDD/2) or externally connected on AUX4 (pin 12). The comparator output signals are passed to the GPIO logic block (see "GPIO and Interrupt Control" section), where they can be used to send an interrupt to the CPU via the AC-Link or via the IRQ pin, and / or to wake up the WM9713L from sleep mode. COMP1/AUX1 (pin 29) corresponds to GPIO bit 15 and COMP2/AUX2 (pin30) to bit 14. REGISTER ADDRESS 4Eh BIT 15 LABEL DEFAULT CP1 1 DESCRIPTION COMP1 Polarity Control 0: Alarm when COMP1 voltage is below VREF 1: Alarm when COMP1 voltage is above VREF Note: see also "GPIO and Interrupt Control" 14 CP2 1 COMP2 Polarity Control 0: Alarm when COMP2 voltage is below VREF 1: Alarm when COMP2 voltage is above VREF Note: see also "GPIO and Interrupt Control" 5Ah 15:13 COMP2 DEL 000 Low Battery Alarm Delay Control 000 = No delay 13 001 = 2 AC-link frames (0.17s) 14 010 = 2 AC-link frames (0.34s) 15 011 = 2 AC-link frames (0.68s) 16 100 = 2 AC-link frames (1.4s) 17 101 = 2 AC-link frames (2.7s) 18 110 = 2 AC-link frames (5.5s) 19 111 = 2 AC-link frames (10.9s) Table 58 Comparator Control REGISTER ADDRESS 5Ch Additional Analogue Functions BIT 14 LABEL DEFAULT C2REF 0 DESCRIPTION Comparator 2 Reference Voltage Select 0 = AVDD/2 1 = WIPER/AUX4 (pin 12) 13:12 C2SRC 00 Comparator 2 Signal Source 00 = AVDD/2 when C2REF=1, else COMP1 powered down 01 = COMP1/AUX1 (pin 29) 10 = COMP2/AUX2 (pin 30) 11 = Reserved 11 C1REF 0 Comparator 1 Reference Voltage Select 0 = AVDD/2 1 = WIPER/AUX4 (pin 12) 10:9 C1SRC 00 Comparator 1 Signal Source 00 = AVDD/2 when C1REF=1, else COMP2 powered down 01 = COMP1/AUX1 (pin 29) 10 = COMP2/AUX2 (pin 30) 11 = Reserved Table 59 Comparator Reference and Source Control w PP, Rev 3.3, November 2011 86 WM9713L Pre-Production COMP2 DELAY FUNCTION COMP2 has an optional delay function for use when the input signal is noisy. When COMP2 triggers and the delay is enabled (i.e. COMP2DEL is non-zero), then GPIO bit 14 does not change state immediately, and no interrupt is generated. Instead, the WM9713L starts a delay timer and checks COMP2 again after the delay time has passed. If COMP2 is still active, then the GPIO bit is set and an interrupt may be generated (depending on the state of the GW14 bit). If COMP2 is no longer active, the GPIO bit is not set, i.e. all register bits are as if COMP2 had never triggered. COMP2 TRIGGERS C2W? 0 END Inactive END [FALSE ALARM] 1 COMP2 DEL? non-zero START TIMER WAIT time=COMP2DEL 000 SHUT DOWN TIMER COMP2? Active SET GI14 END Figure 34 COMP2 Delay Flow Chart w PP, Rev 3.3, November 2011 87 WM9713L Pre-Production GPIO AND INTERRUPT CONTROL The WM9713L has eight GPIO pins that operate as defined in the AC'97 Revision 2.2 specification. Each GPIO pin can be set up as an input or as an output, and has corresponding bits in register 54h and in slot 12. The state of a GPIO output is determined by sending data through slot 12 of outgoing frames (SDATAOUT). Data can be returned from a GPIO input by reading the register bit, or examining slot 12 of incoming frames (SDATAIN). GPIO inputs can be made sticky, and can be programmed to generate an interrupt, transmitted either through the AC-Link or through a dedicated, level-mode interrupt pin (GPIO2/IRQ, pin 45). In addition, the GPIO pins 1, 3, 4 and 5 can be used for the PCM interface by setting bit 15 of register 36h (see "PCM Codec" section). Setting this bit disables any GPIO functions selected on these pins. REGISTER ADDRESS 36h BIT 15 LABEL CTRL DEFAULT 0 PCM CODEC Control 56h DESCRIPTION GPIO Pin Configuration Control 0 = GPIO pins used as GPIOs 1 = GPIO pins used as PCM interface Note: For PCM interface, one or more of these pins (depending on master/slave/partial master mode) must be set up as an output by writing to register 4Ch (see Table 62) 8:2 GEn 1 (GPIO) GPIO Pin Sharing Toggle GPIO pin function 0: secondary function enabled 1: GPIO enabled Table 60 GPIO Additional Function Control GPIO pins 2 to 8 are multi-purpose pins that can also be used for other (non-GPIO / -PCM) purposes, e.g. as a S/PDIF output or to signal pendown. This is controlled by register 56h (see Table 63) Note that GPIO6/7/8 each have an additional function independent of the GPIO / auxiliary functions discussed above. If these pins are to be used as GPIO then the independent function needs to be disabled using its own control registers, e.g. to use pin 11 as a GPIO then the RESETB function needs to be disabled (RSTDIS, register 5Ah, bit 8). Independently of the GPIO pins, the WM9713L also has seven virtual GPIOs. These are signals from inside the WM9713L, which are treated as if they were GPIO input signals. From a software perspective, virtual GPIOs are the same as GPIO pins, but they cannot be set up as outputs, and are not tied to an actual pin. This allows for simple, uniform processing of different types of signals that may generate interrupts (e.g. pen down, battery warnings, jack insertion, high-temperature warning, or GPIO signals). w PP, Rev 3.3, November 2011 88 WM9713L Pre-Production Figure 35 GPIO Logic GPIO SLOT 12 BIT TYPE PIN NO. BIT DESCRIPTION 1 5 GPIO Pin 44 GPIO1 2 6 GPIO Pin 45 GPIO2 / IRQ enabled only when pin not used as IRQ 3 7 GPIO Pin 46 GPIO3 / PENDOWN enabled only when pin not used as PENDOWN 4 8 GPIO Pin 47 5 9 GPIO Pin 48 6 10 GPIO Pin 3 7 11 GPIO Pin 11 8 12 GPIO Pin 12 9 13 Virtual GPIO - GPIO4 / ADA / MASK enabled only when pin not used as ADA GPIO5 / S/PDIF_OUT enabled only when pin not used as S/PDIF_OUT GPIO6 / ADA / MASK Enabled only when pin not used as ADA GPIO7 / PENDOWN enabled only when pin not used as PENDOWN GPIO8 / S/PDIF_OUT enabled only when pin not used as S/PDIF_OUT [MICDET] 10 14 Virtual GPIO [MICSHT] 11 15 Virtual GPIO [Thermal Cutout] 12 16 Virtual GPIO [ADA] 13 17 Virtual GPIO [PEN DOWN] 14 18 Virtual GPIO [COMP2] 15 19 Virtual GPIO [COMP1] Internal microphone bias current detect, generates an interrupt above a threshold (see MICBIAS Current Detect) Internal shorted microphone detect, generates an interrupt above a threshold (see MICBIAS Current Detect) Internal thermal cutout signal, indicates when internal temperature reaches approximately 150C (see "Thermal Sensor") Internal ADA (ADC Data Available) Signal enabled only when touchpanel ADC is active Internal PENDOWN Signal enabled only when pen-down detection is active Internal COMP2 output (Low Battery Alarm) enabled only when COMP2 is on Internal COMP1 output (Dead Battery Alarm) enabled only when COMP1 is on Table 61 GPIO Bits and Pins w PP, Rev 3.3, November 2011 89 WM9713L Pre-Production Note: GPIO7 (Pin 11) has an independent RESETB function. This must be disabled using RSTDIS (Register 5Ah, bit 8) before using Pin 11 as a GPIO / PENDOWN. The properties of the GPIOs are controlled through registers 4Ch to 52h, as shown below. REGISTER ADDRESS BIT 4Ch n LABEL GCn DEFAULT 1 DESCRIPTION GPIO Pin Configuration Control 0 = Output 1 = Input (GC9-15 are always inputs) 4Eh 50h n n GPn GSn 1 0 GPIO Pin Polarity / Type (Note 1) Input (GCn = 1) Output (GCn = 0) 0 = Active low 0 = CMOS output 1 = Active high 1 = Open drain GPIO Pin Sticky Control 0 = Not sticky 1 = Sticky 52h n GWn 0 GPIO Pin Wake-up Control 0 = No wake-up (no interrupts generated by GPIO) 1 = Wake-up (generate interrupts from GPIO) 54h n GIn N/A GPIO Pin Status Read = Returns status of GPIO Write = Writing 0 clears sticky bits Table 62 GPIO Control Note 1: Excludes GP11. For Thermal Sensor Polarity Control (GP11) see Table 40 on page 64. The following procedure is recommended for handling interrupts: When the controller receives an interrupt, check register 54h. For each GPIO bit in descending order of priority, check if the bit is `1'. If yes, execute corresponding interrupt routine, then write `0' to corresponding bit in 54h. If no, continue to next lower priority GPIO. After all GPIOs have been checked, check if interrupt still present or no. If yes, repeat procedure. If no, then jump back to process that ran before the interrupt. If the system CPU cannot execute such an interrupt routine, it may be preferable to switch internal signals (such as PENDOWN) directly onto the GPIO pins. However, in this case the interrupt signals cannot be made sticky, and more GPIO pins are tied up both on the WM9713L and on the CPU. w PP, Rev 3.3, November 2011 90 WM9713L Pre-Production REGISTER ADDRESS 56h BIT 2 LABEL GE2 DEFAULT 1 GPIO pins function select DESCRIPTION GPIO2 (Pin 45) Function Control 0 = Pin 45 is not controlled by GPIO logic 1 = Pin 45 is controlled by GPIO logic Note: When GE2=0, set GC2=0 in 4Ch to output IRQ 3 GE3 1 GPIO3 (Pin 46) Function Control 0 = Pin 46 is not controlled by GPIO logic 1 = Pin 46 is controlled by GPIO logic Note: When GE3=0, set GC3=0 in 4Ch to output PENDOWN 4 GE4 1 GPIO4 (Pin 47) Function Control 0 = Pin 47 is not controlled by GPIO logic 1 = Pin 47 is controlled by GPIO logic Note: When GE4=0, set GC4=0 in 4Ch to output ADA set GC4=1 in 4Ch to input MASK 5 GE5 1 GPIO5 (Pin 48) Function Control 0 = Pin 48 is not controlled by GPIO logic 1 = Pin 48 is controlled by GPIO logic Note: When GE5=0, set GC5=0 in 4Ch to output S/PDIF 6 GE6 1 GPIO6 (Pin 3) Function Control 0 = Pin 3 is not controlled by GPIO logic 1 = Pin 3 is controlled by GPIO logic Note: When GE6=0, set GC6=0 in 4Ch to output ADA signal set GC6=1 in 4Ch to input MASK signal 7 GE7 1 GPIO7 (Pin 11) Function Control 0 = Pin 11 is not controlled by GPIO logic 1 = Pin 11 is controlled by GPIO logic Note: When GE7=0, set GC7=0 in 4Ch to output PENDOWN 8 GE8 1 GPIO8 (Pin 12) Function Control 0 = Pin 12 is not controlled by GPIO logic 1 = Pin 12 is controlled by GPIO logic Note: When GE8=0, set GC8=0 in 4Ch to output S/PDIF Table 63 Using GPIO Pins for Non-GPIO Functions w PP, Rev 3.3, November 2011 91 WM9713L Pre-Production POWER MANAGEMENT INTRODUCTION The WM9713L includes the standard power down control register defined by the AC'97 specification (register 26h). Additionally, it also allows more specific control over the individual blocks of the device through register Powerdown registers 3Ch and 3Eh. Each particular circuit block is active when both the relevant bit in register 26h AND the relevant bit in the Powerdown registers 3Ch and 3Eh are set to `0'. Note that the default power-up condition is all OFF. AC97 CONTROL REGISTER REGISTER ADDRESS BIT 26h 14 Powerdown/ Status register LABEL PR6 DEFAULT DESCRIPTION 1 (disabled) Output PGAs Disable Control 1 (disabled) Internal Clock Disable Control 1 = Disabled 0 = Enabled 13 PR5 1 = Disabled 0 = Enabled 12 PR4 1 (disabled) AC-Link Disable Control 1 = Disabled 0 = Enabled 11 PR3 1 (disabled) Analogue Disable Control 1 = Disabled 0 = Enabled Note: This control disables VREF, input PGAs, DACs, ADCs, mixers and outputs 10 PR2 1 (disabled) Input PGAs and Mixers Disable Control 1 = Disabled 0 = Enabled 9 PR1 1 (disabled) Stereo DAC Disable Control 1 = Disabled 0 = Enabled 8 PR0 1 (disabled) Stereo ADC and Record Mux Disable Control 1 = Disabled 0 = Enabled 3 REF 0 VREF Ready (Read Only) 1 = VREF ready 0 = VREF not ready 2 ANL 0 Analogue Mixers Ready (Read Only) 1 = Analogue mixers ready 0 = Analogue mixers not ready 1 DAC 0 Stereo DAC Ready (Read Only) 1 = DAC ready 0 = DAC not ready 0 ADC 0 Stereo ADC Ready (Read Only) 1 = ADC ready 0 = ADC not ready Table 64 Powerdown and Status Register (Conforms to AC'97 Rev 2.2) w PP, Rev 3.3, November 2011 92 WM9713L Pre-Production EXTENDED POWERDOWN REGISTERS REGISTER ADDRESS 3Ch BIT 15 LABEL DEFAULT PADCPD 1 (disabled) Powerdown (1) DESCRIPTION Touchpanel / AUXADC Disable Control 1 = Disabled 0 = Enabled 14 VMID1M 1 (disabled) 1Meg VMID String Disable Control 1 = Disabled 0 = Enabled 13 TSHUT 1 (disabled) Thermal Shutdown Disable Control 1 = Disabled 0 = Enabled 12 VXDAC 1 (disabled) Voice DAC Disable Control 1 = Disabled 0 = Enabled 11 AUXDAC 1 (disabled) AUXDAC Disable Control 1 = Disabled 0 = Enabled 10 VREF 1 (disabled) VREF Disable Control 1 = Disabled 0 = Enabled 9 PLL 1 (disabled) PLL Disable Control 1 = Disabled 0 = Enabled 7 DACL 1 (disabled) Left DAC Disable Control (see Note 1) 1 = Disabled 0 = Enabled 6 DACR 1 (disabled) Right DAC Disable Control (see Note 1) 1 (disabled) Left ADC Disable Control 1 = Disabled 0 = Enabled 5 ADCL 1 = Disabled 0 = Enabled 4 ADCR 1 (disabled) Right ADC Disable Control 1 = Disabled 0 = Enabled 3 HPLX 1 (disabled) Left Headphone Mixer Disable Control 1 = Disabled 0 = Enabled 2 HPRX 1 (disabled) Right Headphone Mixer Disable Control 1 = Disabled 0 = Enabled 1 SPKX 1 (disabled) Speaker Mixer Disable Control 1 = Disabled 0 = Enabled 0 MX 1 (disabled) Mono Mixer Disable Control 1 = Disabled 0 = Enabled Note: When analogue inputs or outputs are disabled, they are internally connected to VREF through a large resistor (VREF=AVDD/2 except when VREF and VMID1M are both OFF). This maintains the potential at that node and helps to eliminate pops when the pins are re-enabled. Table 65 Extended Power Down Register (1) (Additional to AC'97 Rev 2.2) Note: 1. w When disabling a PGA, always ensure that it is muted first. PP, Rev 3.3, November 2011 93 WM9713L Pre-Production REGISTER ADDRESS 3Eh BIT 15 LABEL DEFAULT MCD 1 (disabled) Powerdown (2) 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 MICBIA S 1 (disabled) MONO 1 (disabled) OUT4 OUT3 HPL HPR SPKL SPKR LL LR MOIN MA MB MPA MPB 1 (disabled) 1 (disabled) 1 (disabled) 1 (disabled) 1 (disabled) 1 (disabled) 1 (disabled) 1 (disabled 1 (disabled) 1 (disabled) 1 (disabled) 1 (disabled) 1 (disabled) DESCRIPTION Microphone Current Detect Disable Control 1 = Disabled 0 = Enabled Microphone Bias Disable Control (see Note 1) 1 = Disabled 0 = Enabled MONO PGA Disable Control (see Note 1) 1 = Disabled 0 = Enabled OUT4 PGA Disable Control (see Note 1) 1 = Disabled 0 = Enabled OUT3 PGA Disable Control (see Note 1) 1 = Disabled 0 = Enabled HPL PGA Disable Control (see Note 1) 1 = Disabled 0 = Enabled HPR PGA Disable Control (see Note 1) 1 = Disabled 0 = Enabled SPKL PGA Disable Control (see Note 1) 1 = Disabled 0 = Enabled SPKR PGA Disable Control (see Note 1) 1 = Disabled 0 = Enabled LINEL PGA Disable Control (see Note 1) 1 = Disabled 0 = Enabled LINER PGA Disable Control (see Note 1) 1 = Disabled 0 = Enabled MONOIN PGA Disable Control (see Note 1) 1 = Disabled 0 = Enabled MICA PGA Disable Control (see Note 1) 1 = Disabled 0 = Enabled MICB PGA Disable Control (see Note 1) 1 = Disabled 0 = Enabled Mic Pre-amp MPA Disable Control 1 = Disabled 0 = Enabled Mic Pre-amp MPB Disable Control 1 = Disabled 0 = Enabled Note: When analogue inputs or outputs are disabled, they are internally connected to VREF through a large resistor (VREF=AVDD/2 except when VREF and VMID1M are both OFF). This maintains the potential at that node and helps to eliminate pops when the pins are re-enabled. Table 66 Extended Power Down Register (2) (Additional to AC'97 Rev 2.2) Note: 1. When disabling a PGA, always ensure that it is muted first. w PP, Rev 3.3, November 2011 94 WM9713L Pre-Production ADDITIONAL POWER MANAGEMENT Mixer output inverters: see "Mixer output Inverters" section. Inverters are disabled by default. Touchpanel Interface: see "Controlling the Touchpanel Digitiser / Power Management". The touchpanel digitiser is OFF by default. SLEEP MODE Whenever the PR4 bit (reg. 26h) is set, the AC-Link interface is disabled, and the WM9713L is in sleep mode. There is in fact a very large number of different sleep modes, depending on the other control bits. For example, the low-power standby mode described below is a sleep mode. It is desirable to use sleep modes whenever possible, as this will save power. The following functions do not require a clock and can therefore operate in sleep mode: Analogue-to-analogue audio (DACs and ADCs unused), e.g. phone call mode Pen-down detection GPIO and interrupts Battery alarm / analogue comparators The WM9713L can awake from sleep mode as a result of A warm reset on the AC-Link (according to the AC'97 specification) A signal on a GPIO pin (if the pin is configured as an input, with wake-up enabled - see "GPIO and Interrupt Control" section) A virtual GPIO event such as pen-down, battery alarm, etc. (see "GPIO and Interrupt Control" section) LOW POWER STANDBY MODE If all the bits in registers 26h, 3Ch and 3Eh are set except VMID1M (register 3Ch, bit 14), then the WM9713L is in low-power standby mode and consumes very little current. A 1M resistor string remains connected across AVDD to generate VREF. This is necessary if the on-chip analogue comparators are used (see "Battery Alarm and Battery Measurement" section), and helps shorten the delay between wake-up and playback readiness. If VREF is not required, the 1M resistor string can be disabled by setting the VMID1M bit, reducing current consumption further. SAVING POWER AT LOW SUPPLY VOLTAGES The analogue supplies to the WM9713L can run from 1.8V to 3.6V. By default, all analogue circuitry on the IC is optimized to run at 3.3V. This set-up is also good for all other supply voltages down to 1.8V. However, at lower voltages, it is possible to save power by reducing the internal bias currents used in the analogue circuitry. This is controlled as shown below. REGISTER ADDRESS 5Ch BIT 6:5 LABEL DEFAULT VBIAS 00 DESCRIPTION Analogue Bias Optimization Control 0X = Default bias current, optimized for 3.3V 10 = Low bias current, optimized for 2.5V 11 = Lowest bias current, optimized for 1.8V Table 67 Analogue Bias Selection POWER ON RESET (POR) The WM9713L has an internal power on reset (PORB) which ensures that a reset is applied to all registers until a supply threshold has been exceeded. The POR circuitry monitors the voltage for both AVDD and DCVDD and will release the internal reset signal once these supplies are both nominally greater than 1.36V. The internal reset signal is an AND of the PORB and RESETB input signal. It is recommended that for operation of the WM9713L, all device power rails should be stable before configuring the device for operation. w PP, Rev 3.3, November 2011 95 WM9713L Pre-Production REGISTER MAP R eg N ame 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 0 SE4 SE3 SE2 SE1 SE0 ID9 ID8 ID7 ID6 ID5 ID4 ID3 ID2 ID1 ID0 Speaker Volume M UL ZCL SPKLVOL M UR ZCR 04h Headphone Volume M UL ZCL HPLVOL M UR 06h OUT3/4 Volume M U4 ZC4 OUT4VOL M U3 08h M 2H M 2S 0 M ONOINVOL 0Ah M ONO Vol & M ONOIN PGA Vol / Routing LINEIN PGA Volume / Routing L2H L2S L2M 0Ch DAC PGA Volume / Routing D2H D2S 0Eh M IC PGA Volume 0 0 10h M IC Rout ing 0 0 0 12h Record PGA Volume 14h Record Routing / M ux Select 16h PCBEEP Volume / Routing B2H B2HVOL B2S B2SVOL B2M B2M VOL 0 0 0 0 AAA0h 18h VxDAC Volume / Routing V2H V2HVOL V2S V2SVOL V2M V2M VOL 0 0 0 0 AAA0h 1Ah AUXDAC Volume / Routing A2H A2HVOL A2S A2SVOL A2M A2M VOL 0 0 0 0 AAA0h 1Ch Output PGA M ux Select 1Eh DAC 3D Control & INV M ux Select DAC Tone Cont rol 00h Reset 02h 20h RM U 8080h ZCR HPRVOL 8080h ZC3 OUT3VOL 8080h MU ZC M ONOVOL LINELVOL 0 0 0 LINERVOL E808h D2M DACLVOL 0 0 0 DACRVOL E808h 0 M ICAVOL 0 0 0 M ICBVOL GRL 0 0 (Extended) R2H 0 0 0 REC BST 0 BASS OUT3 0 3DLC 3DUC 0 DAT 0 TC 3DDEPTH 0000h TRBL 0F0Fh Ext ended Audio ID 2Ah Ext 'd Audio St at/ Ctrl 0 2Ch Audio DACs Sample Rate 2Eh AUXDAC Sample Rate 32h Audio ADCs Sample Rate 36h PCM codec control 3Ah SPDIF cont rol V DRS 3Ch Powerdown (1) 3Eh Powerdown (2) PADCP D M CD 40h General Purpose 0 VM ID 1M M IC BIAS 0 42h Fast Power-Up Cont rol 0 0 44h M CLK / PLL Cont rol 0 46h M CLK / PLL Cont rol 4Ch GPIO Pin Configuration 1 1 1 4Eh GPIO Pin Polarit y / Type C1P C2P PP 50h GPIO Pin Sticky C1S C2S PS AS TS SS MS GS8 GS7 GS6 GS5 GS4 GS3 52h GPIO Pin Wake-Up C1W C2W PW AW TW SW MW GW8 GW7 GW6 GW5 GW4 GW3 54h GPIO Pin Status C1I C2I PI AI TI SI MI GI8 GI7 GI6 GI5 GI4 GI3 GI2 56h GPIO Pin Sharing 58h GPIO Pull UP/DOWN Ct rl 5Ah Additional Functions (1) 5Ch Additional Functions (2) 60h ALC Cont rol 62h ALC / Noise Gate Control 64h AUXDAC input control 74h Digitiser Reg 1 0 0 0 0 0 0 76h Digitiser Reg 2 0 0 0 0 0 0 RPR 45W PDEN PDPOL 0 0 0 0 M BOP M BOP1 M BVO 2EN EN L 0 0 0 M CDTHR JIEN 0000h OUT4 26h M PBBST D600h RECSR HPR 0 8000h RECVOLR 28h 24h M PABST 0808h 00DAh M IC2HVOL M ICCM PSEL M PASEL C880h RECSL HPL 0 BC M B2M M IC2M M IC2H BST GRR (Ext ended) 0 SPKR INVB 0 M A2M ZC R2M BST R2M SPKL INVA 0 RECVOLL R2HVOL M ONO BB 6174h SPKRVOL M IC Input Select & Bias / Detect Ctrl Output Volume M apping (Jack Insert) Powerdown Ctrl/St at 22h D e f a ult M CDSCTHR 0040h EARSPKSEL 0000h 0 0 0 0 0 PR6 PR5 PR4 PR3 PR2 PR1 PR0 0 0 0 0 REF ANL DAC ADC 7F00h ID1 ID0 0 0 REV1 REV0 AM AP LDAC SDAC CDAC 0 0 VRM SPDIF DRA VRA 0405h 0 0 0 0 SPCV 0 0 0 0 0 SEN 0 VRA SPSA DCDRVSEL BB80h AUXDACSR (Auxiliary DAC Sample Rat e) BB80h BB80h ADCSR (Audio ADCs Sample Rat e) CTRL 0 M ODE TSHUT VDAC CP FSP OSR CC (Category Code) DIV L SPSR 0410h DACSR (Audio DACs Sample Rat e) SEL WL 4523h FM T PRE COPY AUD IB PRO 2000h FDFFh VXDA C OUT4 AUXD AC OUT3 VREF PLL 1 DACL DACR ADCL ADCR HPLX HPRX SPKX MX M ONO HPL HPR SPKL SPKR LL LR M OIN MA MB M PA M PB FFFFh 3DE 0 0 0 0 0 LB 0 0 0 0 0 0 0 0000h 0 0 0 0 0 0 0 M ONO SPKL SPKR HPL HPR OUT3 OUT4 0000h SEXT[6:4] CLKSR C DIVSEL DIVCTL 0 0 SEXT[3:0] CLKBX 2 PENDIV CLKAX CLKM U 2 X PGDATA 0080h LF SDM 1 1 1 1 GC8 GC7 GC6 GC5 GC4 GC3 GC2 GC1 0 FFFEh AP TP SP MP GP8 GP7 GP6 GP5 GP4 GP3 GP2 GP1 1 FFFFh GS2 GS1 0 0000h GW2 GW1 0 0000h GI1 0 GPIO pins N[3:0] PGADDR 0000h 1 1 1 1 1 1 1 GE8 GE7 GE6 GE5 GE4 GE3 GE2 1 0 FFFEh PU8 PU7 PU6 PU5 PU4 PU3 PU2 PU1 PD8 PD7 PD6 PD5 PD4 PD3 PD2 PD1 4000h 0 0 0 RSTDIS WAKEE IRQ N INV ASS 0000h 0 COM P2DEL AMUTE C2SRC C2 REF ALCL (t arget level) ALCSEL JSEL 0 AM EN 0 NGAT HLD (hold time) M AXGAIN HPM ODE VBIAS ADCO Die Revision HPF 0 DCY (decay t ime) ZCTIM EOUT AUXDACSLT XSLE PRP C1SRC C1REF 0 ATK (att ack t ime) B032h NGTH (threshold) NGG 3E00h AUXDAC VAL POLL 0000h ADCSEL CTC CR 0000h DEL COO SLEN 78h Digitiser Reg 3 Digitiser Read Back 7Ch Vendor ID1 ASCII character " W" ASCII charact er " M " 574Dh 7Eh Vendor ID2 ASCII charact er " L" Device Identifier 4C13h ADCSRC WAIT PIL RPU 0000h 0006h 7Ah PNDN M SK SLT ADCD (TOUCHPANEL ADC Y DATA) 0001h 0000h Table 68 WM9713L Register Map Note: Register 46h provides access to a sub-page address system to set the SPLL[6:0] and K[21:0] register bits (see Table 6). w PP, Rev 3.3, November 2011 96 WM9713L Pre-Production REGISTER BITS BY ADDRESS REGISTER ADDRESS BIT LABEL DEFAULT DESCRIPTION REFER TO 00h 14:10 SE [4:0] 11000 Indicates a CODEC from Wolfson Microelectronics read-only 9:6 ID9:6 0101 Indicates 18 bits resolution for ADCs and DACs 5 ID5 1 Indicates that the WM9713L supports bass boost 4 ID4 1 Indicates that the WM9713L has a headphone output 3 ID3 0 Indicates that the WM9713L does not support simulated stereo 2 ID2 1 Indicates that the WM9713L supports bass and treble control 1 ID1 0 Indicates that the WM9713L does not support modem functions 0 ID0 0 Indicates that the WM9713L does not have a dedicated microphone ADC Intel's AC'97 Component Specification, Revision 2.2, page 50 Register 00h is a read-only register. Writing any value to this register resets all registers to their default, but does not change the contents of reg. 00h. Reading the register reveals information about the codec to the driver, as required by the AC'97 Specification, Revision 2.2 REGISTER ADDRESS 02h BIT 15 LABEL MUL DEFAULT 1 (mute) DESCRIPTION SPKL Mute Control 1 = Mute REFER TO Analogue Audio Outputs 0 = No mute 14 ZCL 0 (disabled) SPKL Zero Cross Control 1 = Zero cross enabled 0 = Zero cross disabled 13:8 SPKLVOL 000000 (0dB) SPKL Volume Control 000000 = 0dB (maximum) ... (1.5dB steps) 011111 = -46.5dB 1xxxxx = -46.5dB 7 MUR 1 (mute) SPKR Mute Control 1 = Mute 0 = No mute 6 ZCR 0 (disabled) SPKR Zero Cross Control 1 = Zero cross enabled 0 = Zero cross disabled 5:0 SPKRVOL 000000 (0dB) SPKR Volume Control 000000 = 0dB (maximum) ... (1.5dB steps) 011111 = -46.5dB 1xxxxx = -46.5dB Register 02h controls the output pins SPKL and SPKR. w PP, Rev 3.3, November 2011 97 WM9713L Pre-Production REGISTER ADDRESS 04h BIT 15 LABEL MUL DEFAULT 1 (mute) DESCRIPTION HPL Mute Control 1 = Mute REFER TO Analogue Audio Outputs 0 = No mute 14 ZCL 0 (disabled) HPL Zero Cross Control 1 = Zero cross enabled 0 = Zero cross disabled 13:8 HPL VOL 000000 (0dB) HPL Volume Control 000000 = 0dB (maximum) ... (1.5dB steps) 011111 = -46.5dB 1xxxxx = -46.5dB 7 MUR 1 (mute) HPR Mute Control 1 = Mute 0 = No mute 6 ZCR 0 (disabled) HPR Zero Cross Control 1 = Zero cross enabled 0 = Zero cross disabled 5:0 HPR VOL 000000 (0dB) HPR Volume Control 000000 = 0dB (maximum) ... (1.5dB steps) 011111 = -46.5dB 1xxxxx = -46.5dB Register 04h controls the headphone output pins, HPL and HPR. REGISTER ADDRESS 06h BIT 15 LABEL MU4 DEFAULT 1 (mute) DESCRIPTION OUT4 Mute Control 1 = Mute REFER TO Analogue Audio Outputs 0 = No mute 14 ZC4 0 (disabled) OUT4 Zero Cross Control 1 = Zero cross enabled 0 = Zero cross disabled 13:8 OUT4VOL 000000 (0dB) OUT4 Volume Control 000000 = 0dB (maximum) ... (1.5dB steps) 011111 = -46.5dB 1xxxxx = -46.5dB 7 MU3 1 (mute) OUT3 Mute Control 1 = Mute 0 = No mute 6 ZC3 0 (disabled) OUT3 Zero Cross Control 1 = Zero cross enabled 0 = Zero cross disabled 5:0 OUT3VOL 000000 (0dB) OUT3 Volume Control 000000 = 0dB (maximum) ... (1.5dB steps) 011111 = -46.5dB 1xxxxx = -46.5dB Register 06h controls the analogue output pins OUT3 and OUT4. w PP, Rev 3.3, November 2011 98 WM9713L Pre-Production REGISTER ADDRESS 08h BIT 15 LABEL M2H DEFAULT 1 (mute) DESCRIPTION REFER TO MONOIN to Headphone Mixer Mute Control 1 = Mute 0 = No mute 14 M2S 1 (mute) MONOIN to Speaker Mixer Mute Control Analogue Inputs; Analogue Audio Outputs 1 = Mute 0 = No mute 12:8 MONOINVO L 01000 (0dB) MONOIN to Mixers Volume Control 00000 = +12dB ... (1.5dB steps) 11111 = -34.5dB 7 MU 1 (mute) MONO Mute Control 1 = Mute 0 = No mute 6 ZC 0 (disabled) MONO Zero Cross Control 1 = Zero cross enabled 0 = Zero cross disabled 5:0 MONOVOL 000000 (0dB) MONO Volume Control 000000 = 0dB (maximum) ... (1.5dB steps) 011111 = -46.5dB 1xxxxx = -46.5dB Register 08h controls the analogue output pin MONO and the analogue input pin MONOIN. REGISTER ADDRESS 0Ah BIT 15 LABEL L2H DEFAULT 1 (mute) DESCRIPTION LINE to Headphone Mixer Mute Control 1 = Mute 0 = No mute 14 L2S 1 (mute) REFER TO Analogue Inputs, Line Input LINE to Speaker Mixer Mute Control 1 = Mute 0 = No mute 13 L2M 1 (mute) LINE to Mono Mixer Mute Control 1 = Mute 0 = No mute 12:8 LINELVOL 01000 (0dB) LINEL to Mixers Volume Control 00000 = +12dB ... (1.5dB steps) 11111 = -34.5dB 4:0 LINERVOL 01000 (0dB) LINER to Mixers Volume Control 00000 = +12dB ... (1.5dB steps) 11111 = -34.5dB Register 0Ah controls the analogue input pins LINEL and LINER. w PP, Rev 3.3, November 2011 99 WM9713L Pre-Production REGISTER ADDRESS 0Ch BIT 15 LABEL D2H DEFAULT 1 (mute) DESCRIPTION REFER TO DAC to Headphone Mixer Mute Control Audio DACs 1 = Mute 0 = No mute 14 D2S 1 (mute) DAC to Speaker Mixer Mute Control 1 = Mute 0 = No mute 13 D2M 1 (mute) DAC to Mono Mixer Mute Control 1 = Mute 0 = No mute 12:8 DACLVOL 01000 (0dB) Left DAC to Mixers Volume Control 00000 = +12dB ... (1.5dB steps) 11111 = -34.5dB 4:0 DACRVOL 01000 (0dB) Right DAC to Mixers Volume Control 00000 = +12dB ... (1.5dB steps) 11111 = -34.5dB Register 0Ch controls the audio DACs (but not AUXDAC). REGISTER ADDRESS 0Eh BIT 12:8 LABEL DEFAULT MICAVOL 01000 (0dB) DESCRIPTION REFER TO Analogue Inputs, Microphone Input MICA PGA Volume Control 00000 = +12dB ... (1.5dB steps) 11111 = -34.5dB 4:0 MICBVOL 01000 (0dB) MICB PGA Volume Control 00000 = +12dB ... (1.5dB steps) 11111 = -34.5dB Register 0Eh controls the microphone PGA volume (MICA and MICB). REGISTER ADDRESS 10h BIT 7 LABEL MA2M DEFAULT 1 (mute) DESCRIPTION REFER TO Analogue Inputs, Microphone Input MICA to Mono Mixer Mute Control 1 = Mute 0 = No mute 6 MB2M 1 (mute) MICB to Mono Mixer Mute Control 1 = Mute 0 = No mute 5 MIC2MBST 0 (0dB) MIC to Mono Mixer Boost Control 1 = +20dB 0 = 0dB 4:3 MIC2H 11 (mute) MIC to Headphone Mixer Path Control 00 = stereo 01 = MICA only 10 = MICB only 11 = mute MICA and MICB 2:0 MIC2HVOL 010 (0dB) MIC to Headphone Mixer Path Volume Control 000 = +6dB ... (+3dB steps) 111 = -15dB Register 10h controls the microphone routing (MICA and MICB). w PP, Rev 3.3, November 2011 100 WM9713L Pre-Production REGISTER ADDRESS 12h BIT 15 LABEL RMU DEFAULT 1 (mute) DESCRIPTION REFER TO Audio ADC, Record Gain Audio ADC Input Mute Control 1 = Mute 0 = No mute 14 GRL 0 (standard) Left ADC PGA Gain Range Control 1 = Extended 0 = Standard 13:8 7 RECVOLL ZC 000000 (0dB) 0 (disabled) Left ADC Recording Volume Control Standard (GRL=0) Extended (GRL=1) XX0000 = 0dB 000000 = -17.25dB ... (1.5dB steps) ... (0.75dB steps) XX1111 = +22.5dB XX1111 = +30dB ADC PGA Zero Cross Control 1 = Zero cross enabled 0 = Zero cross disabled 6 GRR 0 (standard) Right ADC PGA Gain Range Control 1 = Extended 0 = Standard 5:0 RECVOLR 000000 (0dB) Right ADC Recording Volume Control Standard (GRR=0) Extended (GRR=1) XX0000 = 0dB 000000 = -17.25dB ... (1.5dB steps) ... (0.75dB steps) XX1111 = +22.5dB XX1111 = +30dB Register 12h controls the record volume. w PP, Rev 3.3, November 2011 101 WM9713L Pre-Production REGISTER ADDRESS 14h BIT 15:14 LABEL R2H DEFAULT 11 (mute) DESCRIPTION REFER TO Record Mux to Headphone Mixer Path Control 00 = stereo 01 = left record mux only Audio ADC, Record Selector 10 = right rec mux only 11=mute left and right 13:11 R2HVOL 010 (0dB) Record Mux to Headphone Mixer Path Volume Control 000 = +6dB ... (+3dB steps) 111 = -15dB 10:9 R2M 11 (mute) Record Mux to Mono Mixer Path Control 00 = stereo 01 = left record mux only 10 = right record mux only 11 = mute left and right 8 R2MBST 0 (0dB) Record Mux to Headphone Mixer Boost Control 1 = +20dB 0 = 0dB 6 RECBST 0 (0dB) ADC Record Boost Control 1 = +20dB 0 = 0dB 5:3 RECSL 000 (mic) Left Record Mux Source Control 000 = MICA (pre-PGA) 001 = MICB (pre-PGA) 010 = LINEL (pre-PGA) 011 = MONOIN (pre-PGA) 100 = HPMIXL 101 = SPKMIC 110 = MONOMIX 111 = Reserved 2:0 RECSR 000 (mic) Right Record Mux Source Control 000 = MICA (pre-PGA) 001 = MICB (pre-PGA) 010 = LINEL (pre-PGA) 011 = MONOIN (pre-PGA) 100 = HPMIXL 101 = SPKMIC 110 = MONOMIX 111 = Reserved Register 14h controls the record selector and the ADC to mono mixer path. w PP, Rev 3.3, November 2011 102 WM9713L Pre-Production REGISTER ADDRESS 16h BIT 15 LABEL B2H DEFAULT 1 (mute) DESCRIPTION REFER TO PCBEEP to Headphone Mixer Mute Control 1 = Mute 0 = No mute 14:12 B2HVOL 010 (0dB) Analogue Inputs, PCBEEP Input PCBEEP to Headphone Mixer Volume Control 000 = +6dB ... (+3dB steps) 111 = -15dB 11 B2S 1 (mute) PCBEEP to Speaker Mixer Mute Control 1 = Mute 0 = No mute 10:8 B2SVOL 010 (0dB) PCBEEP to Speaker Mixer Volume Control 000 = +6dB ... (+3dB steps) 111 = -15dB 7 B2M 1 (mute) PCBEEP to Mono Mixer Mute Control 1 = Mute 0 = No mute 6:4 B2MVOL 010 (0dB) PCBEEP to Mono Mixer Volume Control 000 = +6dB ... (+3dB steps) 111 = -15dB Register 16h controls the analogue input pin PCBEEP. REGISTER ADDRESS 18h BIT 15 LABEL V2H DEFAULT 1 (mute) DESCRIPTION REFER TO VXDAC to Headphone Mixer Mute Control 1 = Mute 0 = No mute 14:12 V2HVOL 010 (0dB) Audio Mixers, Side Tone Control VXDAC to Headphone Mixer Volume Control 000 = +6dB ... (+3dB steps) 111 = -15dB 11 V2S 1 (mute) VXDAC to Speaker Mixer Mute Control 1 = Mute 0 = No mute 10:8 V2SVOL 010 (0dB) VXDAC to Speaker Mixer Volume Control 000 = +6dB ... (+3dB steps) 111 = -15dB 7 V2M 1 (mute) VXDAC to Mono Mixer Mute Control 1 = Mute 0 = No mute 6:4 V2MVOL 010 (0dB) VXDAC to Mono Mixer Volume Control 000 = +6dB ... (+3dB steps) 111 = -15dB Register 18h controls the output signal of the Voice DAC. w PP, Rev 3.3, November 2011 103 WM9713L Pre-Production REGISTER ADDRESS 1Ah BIT 15 LABEL A2H DEFAULT 1 (mute) DESCRIPTION REFER TO AUXDAC to Headphone Mixer Mute Control Auxiliary DAC 1 = Mute 0 = No mute 14:12 A2HVOL 010 (0dB) AUXDAC to Headphone Mixer Volume Control 000 = +6dB ... (+3dB steps) 111 = -15dB 11 A2S 1 (mute) AUXDAC to Speaker Mixer Mute Control 1 = Mute 0 = No mute 10:8 A2SVOL 010 (0dB) AUXDAC to Speaker Mixer Volume Control 000 = +6dB ... (+3dB steps) 111 = -15dB 7 A2M 1 (mute) AUXDAC to Mono Mixer Mute Control 1 = Mute 0 = No mute 6:4 A2MVOL 010 (0dB) AUXDAC to Mono Mixer Volume Control 000 = +6dB ... (+3dB steps) 111 = -15dB Register 1Ah controls the output signal of the auxiliary DAC. w PP, Rev 3.3, November 2011 104 WM9713L Pre-Production REGISTER ADDRESS 1Ch BIT 15:14 LABEL MONO DEFAULT 00 (VMID) DESCRIPTION REFER TO Analogue Audio Outputs MONO Source Control 00 = VMID 01 = No input (tri-stated if MONO is disabled) 10 = MONOMIX 11 = INV1 13:11 SPKL 000 (VMID) SPKL Source Control 000 = VMID 001 = No input (tri-stated if SPKL is disabled) 010 = HPMIXL 011 = SPKMIX 100 = INV1 All other values are reserved 10:8 SPKR 000 (VMID) SPKR Source Control 000 = VMID 001 = No input (tri-stated if SPKR is disabled) 010 = HPMIXR 011 = SPKMIX 100 = INV2 All other values are reserved 7:6 HPL 00 (VMID) HPL Source Control 00 = VMID 01 = No input (tri-stated if HPL is disabled) 10 = HPMIXL 11 = Reserved 5:4 HPR 00 (VMID) HPR Source Control 00 = VMID 01 = No input (tri-stated if HPR is disabled) 10 = HPMIXR 11 = Reserved 3:2 OUT3 00 (VMID) OUT3 Source Control 00 = VMID 01 = No input (tri-stated if OUT3 is disabled) 10 = INV1 11 = Reserved 1:0 OUT4 00 (VMID) OUT4 Source Control 00 = VMID 01 = No input (tri-stated if OUT4 is disabled) 10 = INV2 11 = Reserved Register 1Ch controls the inputs to the output PGAs. w PP, Rev 3.3, November 2011 105 WM9713L Pre-Production REGISTER ADDRESS 1Eh BIT 15:13 LABEL INV1 DEFAULT 000 (no input) DESCRIPTION INV1 Source Select 000 = No input (tri-stated) 001 = MONOMIX REFER TO Audio Mixers, Mixer Output Inverters 010 = SPKMIX 011 = HPMIXL 100 = HPMIXR 101 = HPMIXMONO 110 = Reserved 111 = VMID 12:10 INV2 000 (no input) INV2 Source Select 000 = No input (tri-stated) 001 = MONOMIX 010 = SPKMIX 011 = HPMIXL 100 = HPMIXR 101 = HPMIXMONO 110 = Reserved 111 = VMID 5 3DLC 0 (low) 3D Lower Cut-off Frequency Control 1 = High (500Hz at 48kHz sampling) 0 = Low (200Hz at 48kHz sampling) 4 3DUC 0 (high) 3D Upper Cut-off Frequency Control Audio DAC, Stereo DAC, 3D Stereo Enhancement 1 = Low (1.5kHz at 48kHz sampling) 0 = High (2.2kHz at 48kHz sampling) 3:0 3DDEPTH 0000 (0%) 3D Depth Control 0000 = 0% ... (6.67% steps) 1111 = 100% Register 1Eh controls 3D stereo enhancement for the audio DACs and input muxes to the output inverters INV1 and INV2. w PP, Rev 3.3, November 2011 106 WM9713L Pre-Production REGISTER ADDRESS 20h BIT 15 LABEL BB DEFAULT 0 (linear) DESCRIPTION REFER TO Audio DACs, Tone Control / Bass Boost Bass Mode Control 0 = Linear bass control 1 = Adaptive bass boost 12 BC 0 (low) Bass Cut-off Frequency Control 0 = Low (130Hz at 48kHz sampling) 1 = High (200Hz at 48kHz sampling) 11:8 BASS 1111 (off) Bass Intensity Control BB=0 BB=1 0000 = +9dB 0000 = 15dB 0001 = +9dB ... (1dB steps) ... (1.5dB steps) 1110 = 1dB 0111 = 0dB 1111 = Bypass (off) ... (1.5dB steps) 1011-1110 = -6dB 1111 = Bypass (off) 6 DAT 0 (0dB) Pre-DAC Attenuation Control 0 = 0dB 1 = -6dB 4 TC 0 (high) Treble Cut-off Frequency Control 0 = High (8kHz at 48kHz sampling) 1 = Low (4kHz at 48kHz sampling) 3:0 TRBL 1111 (off) Treble Intensity Control 0000 = +9dB 0001 = +9dB ... (1.5dB steps) 0111 = 0dB ... (1.5dB steps) 1011-1110 = -6dB 1111 = Bypass (off) Register 20h controls the bass and treble response of the left and right audio DAC (but not AUXDAC). w PP, Rev 3.3, November 2011 107 WM9713L Pre-Production REGISTER ADDRESS 22h BIT 15:14 LABEL MICCMP DEFAULT 00 (mics) SEL DESCRIPTION REFER TO MIC2A/MIC2B Pin Function Control 00 = MIC2A and MIC2B are microphone inputs 01 = MIC2A microphone input only 10 = MIC2B microphone input only Analogue Inputs, Microphone Input 11 = MIC2A and MIC2B are not microphone inputs 13:12 MPASEL 00 (MIC1) MPA Pre-Amp Source Control 00 = MIC1 01 = MIC2A 10 = MIC2B 11 = Reserved 11:10 MPABST 00 (+12dB) MPA Pre-Amp Volume Control 00 = +12dB 01 = +18dB 10 = +24dB 11 = +30dB 9:8 MPBBST 00 (+12dB) MPB Pre-Amp Volume Control 00 = +12dB 01 = +18dB 10 = +24dB 11 = +30dB 7 MBOP2EN 0 (disabled) MICBIAS Output 2 Enable Control 1 = Enable MICBIAS output on GPIO8 (pin 12) 0 = Disable MICBIAS output on GPIO8 (pin 12) 6 MBOP1EN 1 (enabled) MICBIAS Output 1 Enable Control 1 = Enable MICBIAS output on MICBIAS (pin 28) 0 = Disable MICBIAS output on MICBIAS (pin 28) 5 MBVOL 0 (0.9xAVDD) MICBIAS Output Voltage Control 1 = 0.75 x AVDD 0 = 0.9 x AVDD 4:2 MCDTHR 000 (100uA) Mic Detect Threshold Control 000 = 100A ... (100A steps) 111 = 800A 1:0 MCDSCTHR 00 (600uA) Mic Detect Short Circuit Threshold Control 00 = 600A 01 = 1200uA 10 = 1800uA 11 = 2400A Register 22h controls the microphone input configuration and microphone bias and detect configuration. w PP, Rev 3.3, November 2011 108 WM9713L Pre-Production REGISTER ADDRESS 24h BIT 4 LABEL JIEN DEFAULT 0 (disabled) DESCRIPTION REFER TO Jack Insertion and AutoSwitching Jack Insert Control 0 = Disable jack insert circuitry 1 = Enable jack insert circuitry 3:2 DCDRVSEL 00 (AC) Jack Insert Headphone DC Reference Control 00 = AC coupled headphones, no DC source 01 = OUT3 is mid-rail output buffer 10 = Reserved 11 = OUT4 is mid-rail output buffer 1:0 EARSPK 00 (none) SEL Ear Speaker Source Control 00 = No ear speaker 01 = MONO and HPL 10 = OUT3 and HPL 11 = OUT4 and HPL Register 24h controls the output volume mapping on headphone jack insertion. REGISTER ADDRESS 26h BIT 14 LABEL PR6 DEFAULT 1 (disabled) DESCRIPTION REFER TO Power Management Output PGAs Disable Control 1 = Disabled 0 = Enabled 13 PR5 1 (disabled) Internal Clock Disable Control 1 = Disabled 0 = Enabled 12 PR4 1 (disabled) AC-Link Disable Control 1 = Disabled 0 = Enabled 11 PR3 1 (disabled) Analogue Disable Control 1 = Disabled 0 = Enabled 10 PR2 1 (disabled) Input PGAs and Mixers Disable Control 1 = Disabled 0 = Enabled 9 PR1 1 (disabled) Stereo DAC Disable Control 1 = Disabled 0 = Enabled 8 PR0 1 (disabled) Stereo ADC and Record Mux Disable Control 1 = Disabled 0 = Enabled 3 REF 0 (not ready) VREF Ready (Read Only) 1 = VREF ready 0 = VREF not ready 2 ANL 0 (not ready) Analogue Mixers Ready (Read Only) 1 = Analogue mixers ready 0 = Analogue mixers not ready 1 DAC 0 (not ready) Stereo DAC Ready (Read Only) 1 = DAC ready 0 = DAC not ready 0 ADC 0 (not ready) Stereo ADC Ready (Read Only) 1 = ADC ready 0 = ADC not ready Register 26h is for power management according to the AC'97 specification. Note that the actual state of many circuit blocks depends on both register 26h AND registers 3Ch and 3Eh. w PP, Rev 3.3, November 2011 109 WM9713L Pre-Production REGISTER ADDRESS 28h BIT LABEL DEFAULT DESCRIPTION REFER TO 15:14 ID 00 Indicates that the WM9713L is configured as the primary CODEC in the system. 11:10 REV 01 Indicates that the WM9713L conforms to AC'97 Rev2.2 9 AMAP 0 Indicates that the WM9713L does not support slot mapping 8 LDAC 0 Indicates that the WM9713L does not have an LFE DAC 7 SDAC 0 Indicates that the WM9713L does not have Surround DACs 6 CDAC 0 Indicates that the WM9713L does not have a Centre DAC 3 VRM 0 Indicates that the WM9713L does not have a dedicated, variable rate microphone ADC 2 SPDIF 1 Indicates that the WM9713L supports S/PDIF output 1 DRA 0 Indicates that the WM9713L does not support double rate audio 0 VRA 1 Indicates that the WM9713L supports variable rate audio read-only Intel's AC'97 Component Specification, Revision 2.2, page 59 Register 28h is a read-only register that indicates to the driver which advanced AC'97 features the WM9713L supports. REGISTER ADDRESS 2Ah BIT 10 LABEL SPCV DEFAULT 0 DESCRIPTION REFER TO S/PDIF Validity Bit (Read Only) Digital Audio (S/PDIF) Output 1 = Valid 0 = Not valid 5:4 SPSA 01 (slots 6, 9) S/PDIF Slot Assignment Control 00 = Slots 3 and 4 01 = Slots 6 and 9 10 = Slots 7 and 8 11 = Slots 10 and 11 2 SEN 0 (disabled) S/PDIF Output Enable Control 1 = Enabled 0 = Disabled 0 VRA 0 (OFF) Variable Rate Audio Control 1 = Enable VRA 0 = Disable VRA (ADC and DAC run at 48kHz) Register 2Ah controls the S/PDIF output and variable rate audio. w PP, Rev 3.3, November 2011 110 WM9713L Pre-Production REGISTER ADDRESS 2Ch BIT all LABEL DACSR DEFAULT BB80h (48kHz) DESCRIPTION REFER TO Variable Rate Audio / Sample Rate Conversion Stereo DAC Sample Rate Control 1F40h = 8kHz 2B11h = 11.025kHz 2EE0h = 12kHz 3E80h = 16kHz 5622h = 22.05kHz 5DC0h = 24kHz 7D00h = 32kHz AC44h = 44.1kHz BB80h = 48kHz Any other value defaults to the nearest supported sample rate 2Eh all AUXDACSR BB80h (48kHz) AUXDAC Sample Rate Control 1F40h = 8kHz 2B11h = 11.025kHz 2EE0h = 12kHz 3E80h = 16kHz 5622h = 22.05kHz 5DC0h = 24kHz 7D00h = 32kHz AC44h = 44.1kHz BB80h = 48kHz Any other value defaults to the nearest supported sample rate 32h all ADCSR BB80h (48kHz) Stereo ADC Sample Rate Control 1F40h = 8kHz 2B11h = 11.025kHz 2EE0h = 12kHz 3E80h = 16kHz 5622h = 22.05kHz 5DC0h = 24kHz 7D00h = 32kHz AC44h = 44.1kHz BB80h = 48kHz Any other value defaults to the nearest supported sample rate Note: The VRA bit in register 2Ah must be set first to obtain sample rates other than 48kHz Registers 2Ch, 2Eh 32h and control the sample rates for the stereo DAC, auxiliary DAC and audio ADC, respectively. w PP, Rev 3.3, November 2011 111 WM9713L Pre-Production REGISTER ADDRESS 36h BIT 15 LABEL CTRL DEFAULT DESCRIPTION REFER TO 0 (GPIO reg) GPIO Pin Configuration Control PCM CODEC 0 = GPIO pins used as GPIOs 1 = GPIO pins used as PCM interface 14:13 MODE 10 (master mode) PCM Interface Mode Control 00 = PCM interface disabled 01 = Slave mode 10 = Master mode 11 = Partial master mode 11:9 DIV 010 (1/4) PCMCLK Rate Control 000 = Voice DAC clock 001 = Voice DAC clock / 2 010 = Voice DAC clock / 4 011 = Voice DAC clock / 8 100 = Voice DAC clock / 16 All other values are reserved 8 VDACOSR 0 (64x) Voice DAC Oversampling Rate Control 0 = 64 x fs 1 = 128 x fs 7 CP 0 (normal) PCMCLK Polarity Control 0 = Normal 1 = Inverted 6 5:4 FSP SEL 0 (normal) 00 (normal) FMT = 00, 01 or 10 FMT = 11 PCMFS Polarity Control DSP Mode Control 0 = Normal 0 = DSP Mode A 1 = Inverted 1 = DSP Mode B PCM ADC Output Channel Control 00 = Normal stereo 01 = Reverse stereo 10 = Output left ADC data only 11 = Output right ADC data only 3:2 WL 10 (24 bits) PCM Data Word Length Control 00 = 16-bit 01 = 20-bit 10 = 24-bit 11 = 32-bit (not supported when FMT=00) 1:0 FMT 2 10 (I S) PCM Data Format Control 00 = Right justified 01 = Left justified 2 10 = I S 11 = DSP mode Register 36h controls the PCM CODEC. w PP, Rev 3.3, November 2011 112 WM9713L Pre-Production REGISTER ADDRESS 3Ah BIT 15 LABEL V DEFAULT 0 DESCRIPTION REFER TO Digital Audio (S/PDIF) Output S/PDIF Validity Bit 1 = Valid 0 = Not valid 14 DRS 0 Indicates that the WM9713L does not support double rate S/PDIF output (read-only) 13:12 SPSR 10 Indicates that the WM9713L only supports 48kHz sampling on the S/PDIF output (read-only) 11 L 0 S/PDIF L-bit Control 10:4 CC 0000000 3 PRE 0 Programmed as required by user S/PDIF Category Code Control Category code; programmed as required by user S/PDIF Pre-emphasis Indication Control 0 = no pre-emphasis 1 = 50/15s pre-emphasis 2 COPY 0 S/PDIF Copyright Indication Control 0 = Copyright not asserted 1 = Copyright asserted 1 AUDIB 0 S/PDIF Non-audio Indication Control 0 = PCM data 1 = Non-PCM data 0 PRO 0 S/PDIF Professional Indication Control 0 = Consumer mode 1 = Professional mode Register 3Ah Read/Write. Controls the S/PDIF output. w PP, Rev 3.3, November 2011 113 WM9713L Pre-Production REGISTER ADDRESS 3Ch BIT 15 LABEL PADCPD DEFAULT 1 (disabled) DESCRIPTION REFER TO Touchpanel / AUXADC Disable Control 1 = Disabled Power Management 0 = Enabled 14 VMID1M 1 (disabled) 1Meg VMID String Disable Control 1 = Disabled 0 = Enabled 13 TSHUT 1 (disabled) Thermal Shutdown Disable Control 1 = Disabled 0 = Enabled 12 VXDAC 1 (disabled) Voice DAC Disable Control 1 = Disabled 0 = Enabled 11 AUXDAC 1 (disabled) AUXDAC Disable Control 1 = Disabled 0 = Enabled 10 VREF 1 (disabled) VREF Disable Control 1 = Disabled 0 = Enabled 9 PLL 1 (disabled) PLL Disable Control 1 = Disabled 0 = Enabled 7 DACL 1 (disabled) Left DAC Disable Control 1 = Disabled 0 = Enabled 6 DACR 1 (disabled) Right DAC Disable Control 1 = Disabled 0 = Enabled 5 ADCL 1 (disabled) Left ADC Disable Control 1 = Disabled 0 = Enabled 4 ADCR 1 (disabled) Right ADC Disable Control 1 = Disabled 0 = Enabled 3 HPLX 1 (disabled) Left Headphone Mixer Disable Control 1 = Disabled 0 = Enabled 2 HPRX 1 (disabled) Right Headphone Mixer Disable Control 1 = Disabled 0 = Enabled 1 SPKX 1 (disabled) Speaker Mixer Disable Control 1 = Disabled 0 = Enabled 0 MX 1 (disabled) Mono Mixer Disable Control 1 = Disabled 0 = Enabled * "0" corresponds to "ON", if and only if the corresponding bit in register 26h is also 0. Register 3Ch is for power management additional to the AC'97 specification. Note that the actual state of each circuit block depends on both register 3Ch AND register 26h. w PP, Rev 3.3, November 2011 114 WM9713L Pre-Production REGISTER ADDRESS 3Eh BIT 15 LABEL MCD DEFAULT 1 (disabled) DESCRIPTION REFER TO Microphone Current Detect Disable Control 1 = Disabled Power Management 0 = Enabled 14 MICBIAS 1 (disabled) Microphone Bias Disable Control 1 = Disabled 0 = Enabled 13 MONO 1 (disabled) MONO PGA Disable Control 1 = Disabled 0 = Enabled 12 OUT4 1 (disabled) OUT4 PGA Disable Control 1 = Disabled 0 = Enabled 11 OUT3 1 (disabled) OUT3 PGA Disable Control 1 = Disabled 0 = Enabled 10 HPL 1 (disabled) HPL PGA Disable Control 1 = Disabled 0 = Enabled 9 HPR 1 (disabled) HPR PGA Disable Control 1 = Disabled 0 = Enabled 8 SPKL 1 (disabled) SPKL PGA Disable Control 1 = Disabled 0 = Enabled 7 SPKR 1 (disabled) SPKR PGA Disable Control 1 = Disabled 0 = Enabled 6 LL 1 (disabled) LINEL PGA Disable Control 1 = Disabled 0 = Enabled 5 LR 1 (disabled) LINER PGA Disable Control 1 = Disabled 0 = Enabled 4 MOIN 1 (disabled) MONOIN PGA Disable Control 1 = Disabled 0 = Enabled 3 MA 1 (disabled) MICA PGA Disable Control 1 = Disabled 0 = Enabled 2 MB 1 (disabled) MICB PGA Disable Control 1 = Disabled 0 = Enabled 1 MPA 1 (disabled) Mic Pre-amp MPA Disable Control 1 = Disabled 0 = Enabled 0 MPB 1 (disabled) Mic Pre-amp MPB Disable Control 1 = Disabled 0 = Enabled * "0" corresponds to "ON", if and only if the corresponding bit in register 26h is also 0. Register 3Eh is for power management additional to the AC'97 specification. Note that the actual state of each circuit block depends on both register 3Eh AND register 26h. w PP, Rev 3.3, November 2011 115 WM9713L Pre-Production REGISTER ADDRESS 40h BIT 13 LABEL 3DE DEFAULT 0 (disabled) DESCRIPTION 3D Enhancement Control 1 = Enabled 0 = Disabled 7 LB 0 (disabled) Digital Loopback Control 1 = Enabled 0 = Disabled REFER TO Audio DACs, 3D Stereo Enhancement Intel's AC'97 Component Specification, Revision 2.2, page 55 Register 40h is a "general purpose" register as defined by the AC'97 specification. Only two bits are implemented in the WM9713L. REGISTER ADDRESS 42h BIT 6 LABEL MONO DEFAULT 0 (normal) DESCRIPTION MONO Fast Power Up Control 1 = Fast power up 0 = Normal power up 5 SPKL 0 (normal) REFER TO Analogue Audio Outputs, Power-Up SPKL Fast Power Up Control 1 = Fast power up 0 = Normal power up 4 SPKR 0 (normal) SPKR Fast Power Up Control 1 = Fast power up 0 = Normal power up 3 HPL 0 (normal) HPL Fast Power Up Control 1 = Fast power up 0 = Normal power up 2 HPR 0 (normal) HPR Fast Power Up Control 1 = Fast power up 0 = Normal power up 1 OUT3 0 (normal) OUT3 Fast Power Up Control 1 = Fast power up 0 = Normal power up 0 OUT4 0 (normal) OUT4 Fast Power Up Control 1 = Fast power up 0 = Normal power up Register 42h controls power-up conditions for output PGAs. w PP, Rev 3.3, November 2011 116 WM9713L Pre-Production REGISTER ADDRESS 44h BIT 14:12 LABEL SEXT[6:4] DEFAULT 000 (div 1) DESCRIPTION REFER TO Hi-Fi Block Clock Division Control Clock 000 = f Generation 001 = f/2 ... 111 = f/8 11:8 SEXT[3:0] 0000 (div 1) Voice DAC Clock Division Control 0000 = f 0001 = f/2 ... 1111 = f/16 7 CLKSRC 1 (external) AC97 CLK Source Control 1 = External clock 0 = PLL clock 5:3 PENDIV 000 (f/16) AUXADC Clock Division Control 000 = f/16 001 = f/12 010 = f/8 011 = f/6 100 = f/4 101 = f/3 110 = f/2 111 = f 2 CLKBX2 0 (normal) MCLKB Multiplier Control 0 = Normal 1 = Multiply by 2 1 CLKAX2 0 (Off) MCLKA Multiplier Control 0 = Normal 1 = Multiply by 2 0 CLKMUX 0 (MCLKA) External Clock Source Control 0 = Use MCLKA 1 = Use MCLKB Register 44h controls clock division and muxing. w PP, Rev 3.3, November 2011 117 WM9713L Pre-Production REGISTER ADDRESS 46h BIT 15:12 LABEL N[3:0] DEFAULT 0000 (div by 1) DESCRIPTION REFER TO PLL Mode PLL N Divide Control 0000 = Divide by 1 0001 = Divide by 1 0010 = Divide by 2 ... 1111 = Divide by 15 11 LF 0 (normal) PLL Low Frequency Input Control 1 = Low frequency mode (input clock < 8.192MHz) 0 = Normal mode 10 SDM 0 (disabled) PLL SDM Enable Control 1 = Enable SDM (required for fractional N mode) 0 = Disable SDM 9 DIVSEL 0 (div by 1) PLL Input Clock Division Control 0 = Divide by 1 1 = Divide according to DIVCTL 8 DIVCTL 0 PLL Input Clock Division Value Control 0 = Divide by 2 1 = Divide by 4 6:4 PGADDR 000 Pager Address Pager address bits to access programming of K[21:0] and SPLL[6:0] 3:0 PGDATA 0000 Pager Data Pager data bits Register 46h controls PLL clock generation. w PP, Rev 3.3, November 2011 118 WM9713L Pre-Production REGISTER ADDRESS 4Ch BIT n LABEL GCn DEFAULT 1 (input) DESCRIPTION REFER TO GPIO and Interrupt Control GPIO Pin Configuration Control 0 = Output 1 = Input (GC9-15 are always inputs) 4Eh 50h n n GPn GSn 1 (active high) 0 (not sticky) GPIO Pin Polarity / Type Input (GCn = 1) Output (GCn = 0) 0 = Active low 0 = CMOS output 1 = Active high 1 = Open drain GPIO Pin Sticky Control 0 = Not sticky 1 = Sticky 52h n GWn 0 (no wakeup) GPIO Pin Wake-up Control 0 = No wake-up (no interrupts generated by GPIO) 1 = Wake-up (generate interrupts from GPIO) 54h n GIn N/A GPIO Pin Status Read = Returns status of GPIO Write = Writing 0 clears sticky bits Bit definitions for registers 4Ch to 54h 15 Controls Comparator 1 signal (virtual GPIO) 14 Controls Comparator 2 signal (virtual GPIO) 13 Controls Pen-Down Detector signal (virtual GPIO) 12 Controls ADA signal (virtual GPIO) 11 Controls Thermal sensor signal (virtual GPIO) 10 Controls Microphone short detect (virtual GPIO) 9 Controls Microphone insert detect (virtual GPIO) 8 Controls GPIO8 (pin 12) 7 Controls GPIO7 (pin 11) 6 Controls GPIO6 (pin 3) 5 Controls GPIO5 (pin 48) 4 Controls GPIO4 (pin 47) 3 Controls GPIO3 (pin 46) 2 Controls GPIO2 (pin 45) 1 Controls GPIO1 (pin 44) Register 4Ch to 54h control the GPIO pins and virtual GPIO signals. w PP, Rev 3.3, November 2011 119 WM9713L Pre-Production REGISTER ADDRESS 56h BIT 8 LABEL GE8 DEFAULT 1 (GPIO) DESCRIPTION REFER TO GPIO8 (Pin 12) Function Control 0 = Pin 12 is not controlled by GPIO logic 1 = Pin 12 is controlled by GPIO logic 7 GE7 1 (GPIO) GPIO and Interrupt Control GPIO7 (Pin 11) Function Control 0 = Pin 11 is not controlled by GPIO logic 1 = Pin 11 is controlled by GPIO logic 6 GE6 1 (GPIO) GPIO6 (Pin 3) Function Control 0 = Pin 3 is not controlled by GPIO logic 1 = Pin 3 is controlled by GPIO logic 5 GE5 1 (GPIO) GPIO5 (Pin 48) Function Control 0 = Pin 48 is not controlled by GPIO logic 1 = Pin 48 is controlled by GPIO logic 4 GE4 1 (GPIO) GPIO4 (Pin 47) Function Control 0 = Pin 47 is not controlled by GPIO logic 1 = Pin 47 is controlled by GPIO logic 3 GE3 1 (GPIO) GPIO3 (Pin 46) Function Control 0 = Pin 46 is not controlled by GPIO logic 1 = Pin 46 is controlled by GPIO logic 2 GE2 1 (GPIO) GPIO2 (Pin 45) Function Control 0 = Pin 45 is not controlled by GPIO logic 1 = Pin 45 is controlled by GPIO logic Register 56h controls the use of GPIO pins for non-GPIO functions. REGISTER ADDRESS 58h BIT 15:8 LABEL PU DEFAULT 01000000 DESCRIPTION REFER TO GPIO Pin Pull-Up Control 1 = Enables weak pull-up on GPIO pins 0 = No pull-up on GPIO pins 7:0 PD 00000000 GPIO and Interrupt Control GPIO Pin Pull-Down Control 1 = Enables weak pull-down on GPIO pins 0 = No pull-down on GPIO pins Register 58h controls GPIO pull-up/down. w PP, Rev 3.3, November 2011 120 WM9713L Pre-Production REGISTER ADDRESS 5Ah BIT 15:13 LABEL DEFAULT COMP2DEL 000 (no delay) DESCRIPTION REFER TO Battery Alarm Low Battery Alarm Delay Control 000 = No delay 13 001 = 2 AC-link frames 14 010 = 2 AC-link frames 15 011 = 2 AC-link frames 16 100 = 2 AC-link frames 17 101 = 2 AC-link frames 18 110 = 2 AC-link frames 19 111 = 2 AC-link frames 8 RSTDIS 0 (RESETB enabled) RESETB Pin Disable Control 00 (GPIO1) Jack Detect Pin Input Control GPIO Interrupt and Control 0 = Pin 11 is RESETB 1 = Pin 11 is GPIO (RESETB function disabled) 7:6 JSEL 00 = GPIO1 01 = GPIO6 Jack Insertion & AutoSwitching 10 = GPIO7 11 = GPIO8 5:4 HPMODE 00 (7Hz) HPF Cut-Off Control Audio ADCs 00 = 7Hz @ fs=48kHz 01 = 82Hz @ fs=16kHz 10 = 82Hz @ fs=8kHz 11 = 170Hz @ fs=8kHz 3:2 DIE REV N/A Device Revision (Read-Only) N/A 00 = Rev.A 01 = Rev.B 10 = Rev.C 1 WAKEEN 0 (disabled) GPIO Wake Up Control 0 = Disable wake-up 1 = Enable wake up 0 IRQ INV 0 (normal) GPIO and Interrupt Control IRQ Polarity Control 0 = Normal 1 = Inverted Register 5Ah controls several additional functions. w PP, Rev 3.3, November 2011 121 WM9713L REGISTER ADDRESS 5Ch Pre-Production BIT 15 LABEL AMUTE DEFAULT 0 DESCRIPTION REFER TO Audio DACs, Stereo DACs DAC Automute Status (Read-Only) 0 = DAC not muted 1 = DAC auto-muted 14 C2REF 0 (AVDD/2) Comparator 2 Reference Voltage Select Battery Alarm 0 = AVDD/2 1 = WIPER/AUX4 (pin 12) 13:12 C2SRC 00 (power down) Comparator 2 Signal Source 00 = AVDD/2 when C2REF=1, else powered down 01 = COMP1/AUX1 (pin 29) 10 = COMP2/AUX2 (pin 30) 11 = Reserved 11 C1REF 0 (AVDD/2) Comparator 1 Reference Voltage Select 0 = AVDD/2 1 = WIPER/AUX4 (pin 12) 10:9 C1SRC 00 (OFF) Comparator 1 Signal Source 00 = AVDD/2 when C1REF=1, else powered down 01 = COMP1/AUX1 (pin 29) 10 = COMP2/AUX2 (pin 30) 11 = Reserved 7 AMEN 0 (OFF) Stereo DAC DAC Automute Control 0 = Disabled 1 = Enabled 6:5 VBIAS 00 (3.3V) Power Management Analogue Bias Optimization Control 0X = Optimized for 3.3V 10 = Optimized for 2.5V 11 = Optimized for 1.8V 4 ADCO 0 (SDATAOUT) Digital Audio (S/PDIF) Output S/PDIF Data Source Control 0 = From SDATAOUT 1 = Output from audio ADC 3 HPF 0 (enabled) Audio ADC ADC HPF Disable Control 0 = HPF enabled 1 = HPF disabled 1:0 ASS 00 (slots 3, 4) ADC Data Slot Mapping Control Left Data Right Data 00 = Slot 3 Slot 4 01 = Slot 7 Slot 8 10 = Slot 6 Slot 9 11 = Slot 10 Slot 11 Audio ADC, ADC Slot Mapping Register 5Ch controls several additional functions. w PP, Rev 3.3, November 2011 122 WM9713L Pre-Production REGISTER ADDRESS 60h BIT 15:12 LABEL ALCL DEFAULT 1011 (-12dB) DESCRIPTION REFER TO Audio ADC, Automatic Level Control ALC Target Level Control 0000 = -28.5dBFS ... (1.5dB steps) 1111 = -6dBFS 11:8 HLD 0000 (0ms) ALC Hold Time Control 0000 = 0ms 0001 = 2.67ms ... (time doubles with every step) 1111 = 43.691s 7:4 DCY 0011 (192ms) ALC Decay Time Control 0000 = 24ms ... (time doubles with every step) 1010 to 1111 = 24.58s 3:0 ATK 0010 (24ms) ALC Attack Time Control 0000 = 6ms ... (time doubles with every step) 1010 to 1111 = 6.14s 62h 15:14 ALCSEL 00 (disabled) ALC Function Channel Control 00 = ALC disabled 01 = ALC on right channel only 10 = ALC or left channel only 11 = ALC on both left and right channels 13:11 MAXGAIN 111 (+30dB) ALC PGA Gain Limit Control 000 = -12dB ... (6dB steps) 111 = +30dB 10:9 ZC TIMEOUT 11 (slowest) ALC Zero Cross Timeout Delay Control 14 00 = 2 x tBITCLK (1.33ms) 15 01 = 2 x tBITCLK (2.67ms) 16 10 = 2 x tBITCLK (5.33ms) 17 11 = 2 x tBITCLK (10.67ms) 7 NGAT 0 (disabled) Noise Gate Enable Control 0 = Disabled 1 = Enabled 5 NGG 0 (hold gain) Noise Gate Function Control 0 = Hold PGA gain at last value 1 = Mute ADC output 4:0 NGTH 00000 (76.5dB) Noise Gate Threshold Control 00000 = -76.5dBFS ... (1.5dB steps) 11111 = -30dBFS Registers 60h and 62h control the ALC and Noise Gate functions. w PP, Rev 3.3, November 2011 123 WM9713L REGISTER ADDRESS 64h Pre-Production BIT 15 LABEL XSLE DEFAULT 0 (DC) DESCRIPTION REFER TO Auxiliary DAC AUXDAC Input Select Control 0 = From AUXDACVAL[11:0] (for DC signals) 1 = From AC-Link (for AC signals) 14:12 AUXDAC 000 (Slot 5) SLT AUXDAC Input Control (XSLE=1) 000 = Slot 5, bits 8-19 001 = Slot 6, bits 8-19 010 = Slot 7, bits 8-19 011 = Slot 8, bits 8-19 100 = Slot 9, bits 8-19 101 = Slot 10, bits 8-19 110 = Slot 11, bits 8-19 111 = Reserved 11:0 AUXDAC 000h (min) VAL AUXDAC Input Control (XSLE=0) 000h = Minimum FFFh = Full scale Register 64h controls the input signal of the auxiliary DAC. REGISTER ADDRESS 74h BIT 9 LABEL POLL DEFAULT 0 DESCRIPTION REFER TO Poll Measurement Control Writing "1" initiates a measurement (when CTC is not set) 8 CTC 0 (Polling) Touchpanel Interface AUXADC Measurement Mode 0 = Polling mode 1 = Continuous mode (for DMA) 7 ADCSEL_ 0 (disabled) AUX4 AUX4 Measurement Enable Control 0 = Disable AUX4 measurement (pin 12) 1 = Enable AUX4 measurement (pin 12) 6 ADCSEL_ 0 (disabled) AUX3 AUX3 Measurement Enable Control 0 = Disable AUX3 measurement (SPKVDD/3) 1 = Enable AUX3 measurement (SPKVDD/3) 5 ADCSEL_ 0 (disabled) AUX2 AUX2 Measurement Enable Control 0 = Disable AUX2 measurement (pin 30) 1 = Enable AUX2 measurement (pin 30) 4 ADCSEL_ 0 (disabled) AUX1 AUX1 Measurement Enable Control 0 = Disable AUX1 measurement (pin 29) 1 = Enable AUX1 measurement (pin 29) 3 ADCSEL_ 0 (disabled) PRESSURE Pressure Measurement Enable Control 0 = Disable pressure measurement 1 = Enable pressure measurement 2 ADCSEL_Y 0 (disabled) Y Co-ordinate Measurement Enable Control 0 = Disable Y co-ordinate measurement 1 = Enable Y co-ordinate measurement 1 ADCSEL_X 0 (disabled) X Co-ordinate Measurement Enable Control 0 = Disable X co-ordinate measurement 1 = Enable X co-ordinate measurement 0 COO 0 (single) Co-ordinate Mode Control 0 = Single measurement 1 = Co-ordinate measurement Register 74h controls the measurements for the touchpanel interface. w PP, Rev 3.3, November 2011 124 WM9713L Pre-Production REGISTER ADDRESS 76h BIT 9:8 7:4 LABEL CR DEL DEFAULT 00 (93.75Hz) 0000 (20.8s) DESCRIPTION REFER TO Continuous Mode Conversion Rate DEL < 1111 DEL = 1111 00 = 93.75Hz 00 = 8kHz 01 = 120Hz 01 = 12kHz 10 = 153.75kHz 10 = 24kHz 11 = 187.5Hz 11 = 48kHz Touchpanel Interface Touchpanel Settling Time Control 0000 = 1 AC-link frame (20.8s) 0001 = 2 AC-link frames (41.7s) 0010 = 4 AC-link frames (83.3s) 0011 = 8 AC-link frames (167s) 0100 = 16 AC-link frames (333s) 0101 = 32 AC-link frames (667s) 0110 = 48 AC-link frames (1ms) 0111 = 64 AC-link frames (1.33ms) 1000 = 96 AC-link frame (2ms) 1001 = 128 AC-link frames (2.67ms) 1010 = 160 AC-link frames (3.33ms) 1011 = 192 AC-link frames (4ms) 1100 = 224 AC-link frames (4.67ms) 1101 = 256 AC-link frames (5.33ms) 1110 = 288 AC-link frames (6ms) 1111 = No delay, switch matrix always on 3 SLEN 1 (enabled) Slot Readback Enable Control 0 = Disabled (readback through register map only) 1 = Enabled (readback slot selected by SLT) 2:0 SLT 110 (slot 11) AC'97 Slot for Touchpanel Data Control 000 = Slot 5 001 = Slot 6 010 = Slot 7 011 = Slot 8 100 = Slot 9 101 = Slot 10 110 = Slot 11 111 = Reserved Register 76h controls the touchpanel interface measurement timing. w PP, Rev 3.3, November 2011 125 WM9713L REGISTER ADDRESS 78h Pre-Production BIT 15:14 LABEL PRP DEFAULT 00 (disabled) DESCRIPTION REFER TO Touchpanel Digitiser Power State Control 00 = Disabled Touchpanel Interface 01 = Enable pen detect, wake-up on pen down 10 = Enable pen detect, no wake-up on pen down 11 = Pen detect and pen digitizer enabled 13 RPR 0 (AC-link) Pen Detect Wake-up Mode Control 0 = Wake AC-link only 1 = Wake-up AC-link and WM9713 12 45W 0 (4-wire) Touchpanel Type Control 0 = 4-wire 1 = 5-wire 11 PDEN 0 (always) Touchpanel Measurement Pen Status Control 0 = Measure regardless of pen status 1 = Measure only when pen is down 10 PDPOL 0 (normal) PENDOWN Polarity Control 0 = Normal 1 = Inverted 9 WAIT 0 (overwrite) Touchpanel ADC Data Control 0 = Overwrite existing data in 7Ah with new data 1 = Retain existing data in 7Ah until it is read 8 PIL 0 (200A) Pressure Measurement Current Control 0 = 200A 1 = 400A 7:6 MSK 00 (disabled) Mask Input Control 00 = Disabled 01 = Static 10 = Edge-triggered 11 = Synchronous 5:0 RPU 000001 (64k) Internal Pull-up Resistor Control 000000 = Reserved 000001 = 64k/1 (most sensitive) 000010 = 64k/2 000011 = 64k/3 ... (64k/binary value of RPU) 111111 = 64k/63 (least sensitive) Register 78h controls the physical properties of the touchpanel interface. w PP, Rev 3.3, November 2011 126 WM9713L Pre-Production REGISTER ADDRESS 7Ah BIT 15 LABEL PNDN DEFAULT 0 (pen up) read only DESCRIPTION REFER TO Touchpanel Interface Pen Status (Read-only) 0 = Pen up 1 = Pen down 14:12 ADCSRC 000 (none) Touchpanel ADC Source 000 = No measurement 001 = X co-ordinate measurement 010 = Y co-ordinate measurement 011 = Pressure measurement (4-wire only) 100 = COMP1/AUX1 measurement (pin 29) 101 = COMP2/AUX2 measurement (pin 30) 110 = AUX3 measurements (SPKVDD/3) 111 = WIPER/AUX4 measurement (pin 12) 11:0 ADCD 000h Touchpanel ADC Data (Read-only) Bit 0 = LSB Bit 11 = MSB Registers 7Ah is a read-only register which reports the touchpanel interface status and measurement results. REGISTER ADDRESS BIT LABEL DEFAULT DESCRIPTION 7Ch 15:8 F7:0 57h ASCII character "W" for Wolfson read-only 7:0 S7:0 4Dh ASCII character "M" 7Eh 15:8 T7:0 4Ch ASCII character "L" read-only 7:0 REV7:0 13h Device identifier REFER TO Intel's AC'97 Component Specification , Revision 2.2, page 50 Register 7Ch and 7Eh are read-only registers that indicate to the driver that the CODEC is a WM9713L. w PP, Rev 3.3, November 2011 127 WM9713L Pre-Production APPLICATIONS INFORMATION RECOMMENDED EXTERNAL COMPONENTS Figure 36 Recommended External Component Diagram w PP, Rev 3.3, November 2011 128 WM9713L Pre-Production LINE OUTPUT The headphone outputs, HPL and HPR, can be used as stereo line outputs. The speaker outputs, SPKL and SPKR, can also be used as line outputs. Recommended external components are shown below. Figure 37 Recommended Circuit for Line Output The DC blocking capacitors and the load resistance together determine the lower cut-off frequency, fc. Assuming a 10 k load and C1, C2 = 10F: fc = 1 / 2 (RL+R1) C1 = 1 / (2 x 10.1k x 1F) = 16 Hz Increasing the capacitance lowers fc, improving the bass response. Smaller values of C1 and C2 will diminish the bass response. The function of R1 and R2 is to protect the line outputs from damage when used improperly. AC-COUPLED HEADPHONE OUTPUT The circuit diagram below shows how to connect a stereo headphone to the WM9713L. Figure 38 Simple Headphone Output Circuit Diagram The DC blocking capacitors C1 and C2 together with the load resistance determine the lower cut-off frequency, fc. Increasing the capacitance lowers fc, improving the bass response. Smaller capacitance values will diminish the bass response. For example, with a 16 load and C1 = 220F: fc = 1 / 2 RLC1 = 1 / (2 x 16 x 220F) = 45 Hz w PP, Rev 3.3, November 2011 129 WM9713L Pre-Production DC COUPLED (CAPLESS) HEADPHONE OUTPUT In the interest of saving board space and cost, it may be desirable to eliminate the 220F DC blocking capacitors. This can be achieved by using OUT3 as a headphone pseudo-ground, as shown below. Figure 39 Capless Headphone Output Circuit Diagram As the OUT3 pin produces a DC voltage of AVDD/2, there is no DC offset between HPL/HPR and OUT3, and therefore no DC blocking capacitors are required. However, this configuration has some drawbacks: The power consumption of the WM9713L is increased, due to the additional power consumed in the OUT3 output buffer. If the DC coupled output is connected to the line-in of a grounded piece of equipment, then OUT3 becomes short-circuited. Although the built-in short circuit protection will prevent any damage to the WM9713L, the audio signal will not be transmitted properly. OUT3 cannot be used for another purpose BTL LOUDSPEAKER OUTPUT SPKL and SPKR can differentially drive a mono 8 loudspeaker as shown below. Figure 40 Speaker Output Connection (INV = 1) To drive out differentially one of the speaker outputs must be inverted using INV1 or INV2. w PP, Rev 3.3, November 2011 130 WM9713L Pre-Production COMBINED HEADSET / BTL EAR SPEAKER In smartphone applications with a loudspeaker and separate ear speaker (receiver), a BTL ear speaker can be connected at the OUT3 pin, as shown below. Figure 41 Combined Headset / BTL Ear Speaker The ear speaker and the headset play the same signal. Whenever the headset is plugged in, the headphone outputs are enabled and OUT3 disabled. When the headset is not plugged in, OUT3 is enabled (see "Jack Insertion and Auto-Switching") COMBINED HEADSET / SINGLE-ENDED EAR SPEAKER Instead of a BTL ear speaker, a single-ended ear speaker can also be used, as shown below. Figure 42 Combined Headset / Single-ended Ear Speaker w PP, Rev 3.3, November 2011 131 WM9713L Pre-Production JACK INSERT DETECTION The circuit diagram below shows how to detect when a headphone or headset has been plugged into the headphone socket. It generates an interrupt, instructing the controller to enable HPL and HPR and disable OUT3. Figure 43 Jack Insert Detection Circuit The circuit requires a headphone socket with a switch that closes on insertion (for using sockets with a switch that opens on insertion, please refer to Application Note WAN0182). It detects both headphones and phone headsets. Any GPIO pin can be used, provided that it is configured as an input. HOOKSWITCH DETECTION Alternatively a headphone socket with a switch that opens on insertion can be used. For this mode of operation the GPIO input must be inverted. The circuit diagram below shows how to detect when the "hookswitch" of a phone headset is pressed (pressing the hookswitch is equivalent to lifting the receiver in a stationary telephone). Figure 44 Hookswitch Detection Circuit The circuit uses a GPIO pin as a sense input. The impedance of the microphone and the resistor in the MICBIAS path must be such that the potential at the GPIO pin is above 0.7DBVDD when the hookswitch is open, and below 0.3DBVDD when it is closed. w PP, Rev 3.3, November 2011 132 WM9713L Pre-Production TYPICAL OUTPUT CONFIGURATIONS The WM9713L has three outputs capable of driving loads down to 16 (headphone / line drivers) - HPL, HPR and MONO - and four outputs capable of driving loads down to 8 (loudspeaker / line drivers) - SPKL, SPKR, OUT3 and OUT4. The combination of output drivers, mixers and mixer inverters means that many output configurations can be supported. Below are some examples of typical output configurations for smartphone applications. STEREO SPEAKER Figure 45 shows a typical output configuration for stereo speakers with headphones, ear speaker and hands-free operation. The table shows suggested mixer outputs to select for each output PGA for a given operating scenario. (Note the inverted mixer outputs can be achieved using the mixer output inverters INV1 and INV2). Figure 45 Stereo Speaker Output Configuration w PP, Rev 3.3, November 2011 133 WM9713L Pre-Production MONO SPEAKER Figure 46 shows a typical output configuration for mono speaker with headphones, ear speaker and hands-free operation. The table shows suggested mixer outputs to select for each output PGA for a given operating scenario. (Note the inverted mixer outputs can be achieved using the mixer output inverters INV1 and INV2). Figure 46 Mono Speaker Output Configuration w PP, Rev 3.3, November 2011 134 WM9713L Pre-Production WM9713L MONO SPEAKER Figure 47 shows a typical output configuration compatible with the WM9712 for mono speaker with headphones, ear speaker and hands-free operation. The table shows suggested mixer outputs to select for each output PGA for a given operating scenario. (Note the inverted mixer outputs can be achieved using the mixer output inverters INV1 and INV2). When using this configuration note that AVDD, HPVDD and SPKVDD must all be at the same voltage to achieve the best performance. Figure 47 WM9713L Mono Speaker Configuration w PP, Rev 3.3, November 2011 135 WM9713L Pre-Production PACKAGE DIMENSIONS DM103.A FL: 48 PIN QFN PLASTIC PACKAGE 7 X 7 X 0.9 mm BODY, 0.50 mm LEAD PITCH D2 SEE DETAIL 1 D D2/2 48 37 L 36 INDEX AREA (D/2 X E/2) 1 EXPOSED GROUND 6 PADDLE E2/2 E2 E SEE DETAIL 2 12 25 24 13 e aaa C 2X b 2X BOTTOM VIEW aaa C TOP VIEW ccc C (A3) A 0.08 C SEATING PLANE SIDE VIEW A1 DETAIL 1 DETAIL 2 DETAIL 3 Datum W 45 T (A3) b Exposed lead EXPOSED GROUND PADDLE Terminal Tip e/2 0.30mm G H 1 C e Half etch tie bar DETAIL 3 Symbols A A1 A3 b D D2 E E2 e G H L T W aaa bbb ccc REF Dimensions (mm) NOM MAX 0.90 1.00 0.05 0.02 0.20 REF 0.18 0.25 0.30 7.00 BSC 5.55 5.65 5.75 7.00 BSC 5.55 5.65 5.75 0.5 BSC 0.20 0.10 0.50 0.30 0.4 0.103 0.15 Tolerances of Form and Position 0.15 0.10 0.10 MIN 0.80 0 NOTE 1 JEDEC, MO-220, VARIATION VKKD-4 NOTES: 1. DIMENSION b APPLIED TO METALLIZED TERMINAL AND IS MEASURED BETWEEN 0.15 mm AND 0.30 mm FROM TERMINAL TIP. 2. ALL DIMENSIONS ARE IN MILLIMETRES 3. THE TERMINAL #1 IDENTIFIER AND TERMINAL NUMBERING CONVENTION SHALL CONFORM TO JESD 95-1 SPP-002. 4. COPLANARITY APPLIES TO THE EXPOSED HEAT SINK SLUG AS WELL AS THE TERMINALS. 5. THIS DRAWING IS SUBJECT TO CHANGE WITHOUT NOTICE. 6. REFER TO APPLICATION NOTE WAN_0118 FOR FURTHER INFORMATION REGARDING PCB FOOTPRINTS AND QFN PACKAGE SOLDERING. w PP, Rev 3.3, November 2011 136 Pre-Production WM9713L IMPORTANT NOTICE Wolfson Microelectronics plc ("Wolfson") products and services are sold subject to Wolfson's terms and conditions of sale, delivery and payment supplied at the time of order acknowledgement. Wolfson warrants performance of its products to the specifications in effect at the date of shipment. Wolfson reserves the right to make changes to its products and specifications or to discontinue any product or service without notice. Customers should therefore obtain the latest version of relevant information from Wolfson to verify that the information is current. Testing and other quality control techniques are utilised to the extent Wolfson deems necessary to support its warranty. Specific testing of all parameters of each device is not necessarily performed unless required by law or regulation. In order to minimise risks associated with customer applications, the customer must use adequate design and operating safeguards to minimise inherent or procedural hazards. Wolfson is not liable for applications assistance or customer product design. The customer is solely responsible for its selection and use of Wolfson products. Wolfson is not liable for such selection or use nor for use of any circuitry other than circuitry entirely embodied in a Wolfson product. Wolfson's products are not intended for use in life support systems, appliances, nuclear systems or systems where malfunction can reasonably be expected to result in personal injury, death or severe property or environmental damage. Any use of products by the customer for such purposes is at the customer's own risk. Wolfson does not grant any licence (express or implied) under any patent right, copyright, mask work right or other intellectual property right of Wolfson covering or relating to any combination, machine, or process in which its products or services might be or are used. Any provision or publication of any third party's products or services does not constitute Wolfson's approval, licence, warranty or endorsement thereof. Any third party trade marks contained in this document belong to the respective third party owner. Reproduction of information from Wolfson datasheets is permissible only if reproduction is without alteration and is accompanied by all associated copyright, proprietary and other notices (including this notice) and conditions. Wolfson is not liable for any unauthorised alteration of such information or for any reliance placed thereon. Any representations made, warranties given, and/or liabilities accepted by any person which differ from those contained in this datasheet or in Wolfson's standard terms and conditions of sale, delivery and payment are made, given and/or accepted at that person's own risk. Wolfson is not liable for any such representations, warranties or liabilities or for any reliance placed thereon by any person. ADDRESS: Wolfson Microelectronics plc Westfield House 26 Westfield Road Edinburgh EH11 2QB United Kingdom Tel :: +44 (0)131 272 7000 Fax :: +44 (0)131 272 7001 Email :: sales@wolfsonmicro.com w PP, Rev 3.3, November 2011 137 WM9713L Pre-Production REVISION HISTORY DATE REV ORIGINATOR CHANGES 13/10/2008 3.3 BK Corrected pin numbers for GPIO6 and GPIO8 114 3.3 BK Added note with power-down sequence for VXDAC (see CE000296) 42 24/12/2009 3.3 BK Added AUXDAC THD/SNR min/typ specs 03/08/2010 3.3 SS Made changes to `Thermal Sensor' section and Table 40 to correct and clarify. 60 Added note in Table 62 `GPIO Control' to exclude Thermal Sensor from polarity description and refer to Table 40 `Thermal Shutdown Control'. 86 30/08/2010 13/10/11 3.3 JMacD Order codes updated from WM9713LGEFL/RV and WM9713LGEFL/RV to WM9713CLGEFL/RV and WM9713CLGEFL/RV to reflect change to copper wire bonding 4 13/10/11 3.3 JMacD Package Diagram changed to DM103.A 136 w PP, Rev 3.3, November 2011 138