WM9713L highly integrated input/output device designed mobile computin
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AC'97 Audio Touchpanel CODEC
WM9713L highly integrated input/output device designed mobile computing communications. chip architected dual CODEC operation, supporting Hi-Fi stereo Codec functions link interface, additionally supporting voice Codec functions type Synchronous Serial Port (SSP). third provided which used support generation supervisory tones, ring-tones etc. different sample rates main codec. device connect directly 4-wire 5-wire touchpanel, mono stereo microphones, stereo headphones stereo speaker, reducing total component count system. Cap-less connections headphones, speakers, earpiece used, saving cost board area. Additionally, multiple analog input output pins provided seamless integration with analog connected wireless communication devices. device functions accessed controlled through single AC-Link interface compliant with AC'97 standard. 24.576 masterclock input directly generated internally from 13MHz other frequency) clock onboard PLL. supports wide range input clock from 2.048MHz 78.6MHz. WM9713L operates supply voltages from 1.8V 3.6V. Each section chip powered down under software control save power. device available small leadless 7x7mm package, ideal hand-held portable systems.
WM9713L
FEATURES
AC'97 compatible stereo codec 94dB, -85dB 87dB, -86dB Variable Rate Audio, supports WinCE sample rates Tone Control, Bass Boost Enhancement On-chip 45mW headphone driver On-chip 400mW mono stereo speaker drivers Stereo, mono differential microphone input Automatic Level Control (ALC) insert button press detection Auxiliary mono (ring tone level generation) Seamless interface wireless chipset Resistive touchpanel interface Supports 4-wire 5-wire panels 12-bit resolution, LSBs (<0.5 pixels) touch-pressure measurement Pen-down detection supported Sleep Mode Additional PCM/I2S interface support voice CODEC derived audio clocks. Supports input clock ranging from 2.048MHz 78.6MHz 1.8V 3.6V supplies (digital down 1.62V, speaker 4.2V) 7x7mm 48-lead package
APPLICATIONS
Personal Digital Assistants (PDA) with without phone Smartphones Handheld Tablet Computers
BLOCK DIAGRAM
WOLFSON MICROELECTRONICS
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Preliminary Technical Data, January 2006, Copyright 2006 Wolfson Microelectronics
WM9713L TABLE CONTENTS
Preliminary Technical Data
DESCRIPTION FEATURES.1 APPLICATIONS BLOCK DIAGRAM TABLE CONTENTS CONFIGURATION.4 ORDERING INFORMATION DESCRIPTION ABSOLUTE MAXIMUM RATINGS.7 RECOMMENDED OPERATING CONDITIONS ELECTRICAL CHARACTERISTICS
AUDIO OUTPUTS. AUDIO INPUTS. AUXILIARY MONO (AUXDAC). VOICE (VXDAC) TOUCHPANEL AUXILIARY COMPARATORS REFERENCE VOLTAGES DIGITAL INTERFACE CHARACTERISTICS.
POWER CONSUMPTION DEVICE DESCRIPTION.13
INTRODUCTION. AUDIO PATHS OVERVIEW. CLOCK GENERATION CLOCK DIVISION MODES MODE DATA CONTROL INTERFACE. AC97 INTERFACE INTERFACE
AUDIO ADCS
STEREO ADC. RECORD SELECTOR RECORD GAIN. AUTOMATIC LEVEL CONTROL.
AUDIO DACS
STEREO DAC. VOICE AUXILIARY DAC.
VARIABLE RATE AUDIO SAMPLE RATE CONVERSION AUDIO INPUTS
LINE INPUT MICROPHONE INPUT. MONOIN INPUT. PCBEEP INPUT DIFFERENTIAL MONO INPUT
January 2006
Preliminary Technical Data
WM9713L
AUDIO MIXERS.47
MIXER OVERVIEW HEADPHONE MIXERS SPEAKER MIXER MONO MIXER. MIXER OUTPUT INVERTERS.
ANALOGUE AUDIO OUTPUTS
HEADPHONE OUTPUTS HPR. MONO OUTPUT SPEAKER OUTPUTS SPKL SPKR AUXILLARY OUTPUTS OUT3 OUT4 THERMAL SENSOR JACK INSERTION AUTO-SWITCHING.
DIGITAL AUDIO (SPDIF) OUTPUT.57 TOUCHPANEL INTERFACE.58
PRINCIPLE OPERATION FIVE-WIRE TOUCHPANEL. CONTROLLING TOUCHPANEL DIGITISER
ADDITIONAL FEATURES.72
AUXILIARY INPUTS. BATTERY ALARM ANALOGUE COMPARATORS. GPIO INTERRUPT CONTROL.
POWER MANAGEMENT
INTRODUCTION. AC97 CONTROL REGISTER. EXTENDED POWERDOWN REGISTERS ADDITIONAL POWER MANAGEMENT. POWER RESET (POR) AC97 INTERFACE TIMING.
REGISTER MAP.87
REGISTER BITS ADDRESS
APPLICATIONS INFORMATION .101
RECOMMENDED EXTERNAL COMPONENTS. LINE OUTPUT AC-COUPLED HEADPHONE OUTPUT. COUPLED (CAPLESS) HEADPHONE OUTPUT LOUDSPEAKER OUTPUT COMBINED HEADSET SPEAKER. COMBINED HEADSET SINGLE-ENDED SPEAKER. JACK INSERT DETECTION HOOKSWITCH DETECTION. TYPICAL OUTPUT CONFIGURATIONS
PACKAGE DIMENSIONS .110 IMPORTANT NOTICE .111
ADDRESS:.
January 2006
WM9713L CONFIGURATION
Preliminary Technical Data
ORDERING INFORMATION
DEVICE WM9713LGEFL/V WM9713LGEFL/RV Note: Reel quantity 2,200 TEMPERATURE RANGE +85oC +85oC PACKAGE 48-lead (Pb-free) 48-lead (Pb-free, tape reel) MOISTURE SENSITIVITY LEVEL MSL3 MSL3 PEAK SOLDERING TEMPERATURE 260oC 260oC
January 2006
Preliminary Technical Data
WM9713L
NAME DBVDD MCLKA MCLKB GPIO6 (ADA MASK) DGND1 SDATAOUT BITCLK DGND2 SDATAIN DCVDD SYNC RESETB GPIO7 (PENDOWN) TYPE Supply Digital Input Digital In/Out Supply Digital Input Digital Output Supply Digital Output Supply Digital Input Digital Digital Buffer Supply Master Clock Input Master Clock Input GPIO6 (ADA output MASK input) Digital Ground (return path both DCVDD DBVDD) Serial Data Output from Controller Input WM9713L Serial Interface Clock Output Controller Digital Ground (return path both DCVDD DBVDD) Serial Data Input Controller Output from WM9713L Digital Core Supply Serial Interface Synchronisation Pulse from Controller Reset (asynchronous, active Low, resets registers their default) GPIO7 (pen down output) Sheet Connection 5-wire Touchpanels Auxiliary input GPIO8 (SPDIF digital audio output) Touchpanel Driver Supply Touchpanel Connection: (Right) 4-wire bottom right 5wire Touchpanel Connection: (Top) 4-wire right 5-wire Touchpanel Connection: (Left) 4-wire left 5-wire Touchpanel Connection: (Bottom) 4-wire bottom left 5wire Touchpanel Driver Ground Line Input analogue audio mixers, typically used beeps Mono Input (RX) Microphone preamp input Microphone common mode input Left Line Input Right Line Input Analogue Supply (audio DACs, ADCs, PGAs, amps, mixers) Analogue Ground Internal Reference Voltage (buffered CAP2) Bias Voltage Microphones (buffered CAP2 1.8) Microphone preamp input COMP1 input Auxillary input Microphone preamp input COMP2 input Auxillary input Mono output driver (line headphone) Internal Reference Voltage (normally AVDD/2, overdriven) Auxillary output driver (speaker, line headphone) Speaker ground (feeds output buffers pins Left speaker driver (speaker, line headphone) Right speaker driver (speaker, line headphone) Auxillary output driver (speaker, line headphone) Speaker supply (feeds output buffers pins Headphone left driver (line headphone) Headphone ground (feeds output buffers pins Headphone right driver (line headphone) Analogue ground, chip substrate Headphone supply (feeds output buffers pins
WIPER AUX4 GPIO8 (SPDIF) Analogue TPVDD Y+/TR X-/TL Y-/BL TPGND PCBEEP MONOIN MIC1 MICCM LINEL LINER AVDD AGND VREF MICBIAS MIC2A COMP1 AUX1 MIC2B COMP2 AUX2 MONO CAP2 OUT4 SPKGND SPKL SPKR OUT3 SPKVDD HPGND AGND2 HPVDD Supply Analogue Input Analogue Input Analogue Input Analogue Input Supply Analogue Input Analogue Input Analogue Input Analogue Input Analogue Input Analogue Input Supply Supply Analogue Output Analogue Output Analogue Input Analogue Input Analog output Analogue Analogue Output Supply Analogue Output Analogue Output Analogue Output Supply Analogue Output Supply Analogue Output Supply Supply
January 2006
WM9713L
Notes: NAME GPIO1 PCMCLK GPIO2 GPIO3 PENDOWN PCMFS GPIO4 MASK PCMDAC GPIO5 SPDIF PCMADC GND_PADDLE TYPE Digital Digital Digital Digital Digital GPIO interface clock
Preliminary Technical Data DESCRIPTION GPIO (Interrupt Request) output GPIO down output frame signal GPIO (ADC data available) output Mask input input (DAC) data GPIO SPDIF digital audio output output (ADC) data Paddle (Note
recommended that GND_PADDLE connected analogue ground. Refer "Recommended External Components" diagram "Package Dimensions" section further information.
January 2006
Preliminary Technical Data
WM9713L
ABSOLUTE MAXIMUM RATINGS
Absolute Maximum Ratings stress ratings only. Permanent damage device caused continuously operating beyond these limits. Device functional operating limits guaranteed performance specifications given under Electrical Characteristics test conditions specified. Sensitive Device. This device manufactured CMOS process. therefore generically susceptible damage from excessive static voltages. Proper precautions must taken during handling storage this device. Wolfson tests package types according IPC/JEDEC J-STD-020B Moisture Sensitivity determine acceptable storage conditions prior surface mount assembly. These levels are: MSL1 unlimited floor life <30°C Relative Humidity. normally stored moisture barrier bag. MSL2 storage year <30°C Relative Humidity. Supplied moisture barrier bag. MSL3 storage hours <30°C Relative Humidity. Supplied moisture barrier bag. Moisture Sensitivity Level each package type specified Ordering Information. CONDITION Digital supply voltages (DCVDD, DBVDD) Analogue supply voltages (AVDD, HPVDD, TPVDD) Speaker supply voltage (SPKVDD) Touchpanel supply voltage (TPVDD) Voltage range digital inputs Voltage range analogue inputs Voltage range touchpanel Inputs YVoltage range touchpanel Inputs YOperating temperature range, Storage temperature (TQFP package only) -25oC -65oC DGND -0.3V AGND -0.3V -0.3V -0.3V -0.3V +3.63V +3.63V +4.2V AVDD +0.3V DBVDD +0.3V AVDD +0.3V TPVDD +0.3V AVDD +0.3V +85oC +150oC
RECOMMENDED OPERATING CONDITIONS
PARAMETER Digital input/output buffer supply range Digital core supply range Analogue supply range Speaker supply range Digital ground Analogue ground Difference AGND DGND Note: AGND normally same DGND1/DGND2 DCVDD DBVDD DCVDD AVDD DCVDD should >=2V when using SYMBOL DBVDD DCVDD AVDD, HPVDD, TPVDD SPKVDD DGND1, DGND2 AGND, HPGND, SPKGND, TPGND Note -0.3 TEST CONDITIONS 1.62 1.62 +0.3 UNIT
January 2006
WM9713L ELECTRICAL CHARACTERISTICS
AUDIO OUTPUTS
Preliminary Technical Data
Test Conditions DBVDD=3.3V, DCVDD 3.3V, AVDD=HPVDD=SPKVDD =3.3V, +25oC, 1kHz signal, 48kHz, 24-bit audio data unless otherwise stated. PARAMETER Full-scale output Signal Noise Ratio (A-weighted) Total Harmonic Distortion Power Supply Rejection PSRR -3dB output 100mV, 20Hz 20kHz signal AVDD 200mW SYMBOL TEST CONDITIONS AVDD 3.3V, gains UNIT
Line-Out (HPL/R MONO with 50pF load)
Speaker Output (SPKL/SPKR with bridge tied load, INV=1) Output Power Abs. output power Total Harmonic Distortion Signal Noise Ratio (A-weighted) Output Power Abs. output power Total Harmonic Distortion Signal Noise Ratio (A-weighted) Output Power channel Total Harmonic Distortion POmax 0.05 (rms) (rms)
Stereo Speaker Output (SPKL/OUT4 SPKR/OUT3 with bridge tied load, INV=1) POmax 200mW 0.05 (rms) (rms)
Headphone Output (HPL/R, OUT3/4 SPKL/SPKR with load) Output power very closely correlated with THD; below. PO=10mW, RL=16 PO=10mW, RL=32 PO=20mW, RL=16 PO=20mW, RL=32 Signal Noise Ratio (A-weighted) Note: values valid output power level quoted above example, HPVDD=3.3V RL=16, -80dB when output power 10mW. Higher output power possible, will result deterioration THD.
January 2006
Preliminary Technical Data
WM9713L
AUDIO INPUTS
Test Conditions DBVDD=3.3V, DCVDD 3.3V, AVDD 3.3V, +25oC, 1kHz signal, 48kHz, 24-bit audio data unless otherwise stated. PARAMETER Full Scale Input Signal Level (for Input Gain) SYMBOL VINFS TEST CONDITIONS AVDD 3.3V AVDD 1.8V differential input mode AVDD 3.3V differential input mode AVDD 1.8V Input Resistance Input Capacitance Line input (LINEL, LINER, MONOIN) Signal Noise Ratio (A-weighted) Total Harmonic Distortion Power Supply Rejection Signal Noise Ratio (A-weighted) Total Harmonic Distortion Power Supply Rejection Ratio Common Mode Rejection Ratio PSRR PSRR CMRR Differential mode -3dBFS input 20Hz 20kHz 20dB boost enabled 20dB boost enabled gain 12dB gain 25.6 10.4 0.545 0.273 38.4 15.6 UNIT Vrms
LINEL/R, MIC1/2A/2B MONOIN pins
Microphone input (MIC1/2A/2B pins)
AUXILIARY MONO (AUXDAC)
Test Conditions DBVDD=3.3V, DCVDD 3.3V, AVDD 3.3V, +25oC, 1kHz signal, 8kHz, 24-bit audio data unless otherwise stated. PARAMETER Resolution Full scale output voltage Signal Noise Ratio (A-weighted) Total Harmonic Distortion AVDD=3.3V SYMBOL TEST CONDITIONS UNIT bits Vrms
VOICE (VXDAC)
Test Conditions DBVDD=3.3V, DCVDD 3.3V, AVDD 3.3V, +25oC, 1kHz signal, 8kHz, 24-bit audio data unless otherwise stated. PARAMETER Resolution Sample rates Full scale output voltage Signal Noise Ratio (A-weighted) Total Harmonic Distortion AVDD=3.3V SYMBOL TEST CONDITIONS UNIT bits Ks/s Vrms
January 2006
WM9713L
TOUCHPANEL AUXILIARY
Test Conditions DBVDD 3.3V, DCVDD 3.3V, AVDD 3.3V, +25oC, unless otherwise stated. PARAMETER Input Voltage Input leakage current Resolution Differential Non-Linearity Error Integral Non-Linearity Error Offset Error Gain Error Power Supply Rejection Channel-to-channel isolation Throughput Rate Settling Time (programmable) Switch matrix resistance Programmable Pull-up resistor down detector threshold Pressure measurement current 000001 VDD/2 1111 (zero settling time) MCLK 24.576MHz PSRR selected input SYMBOL TEST CONDITIONS AGND ±0.25
Preliminary Technical Data
AVDD
UNIT bits
Input Pins WIPER/AUX4, COMP1/AUX1, COMP2/AUX2
COMPARATORS
Test Conditions DBVDD 3.3V, DCVDD 3.3V, AVDD 3.3V, +25oC, unless otherwise stated. PARAMETER Input Voltage Input leakage current Comparator Input Offset (COMP1, COMP2 only) COMP2 delay (COMP2 only) MCLK 24.576MHz selected input SYMBOL TEST CONDITIONS AGND 10.9 AVDD UNIT
COMP1/AUX1 COMP2/AUX2 (pins when used inputs)
REFERENCE VOLTAGES
Test Conditions DBVDD=3.3V, DCVDD 3.3V, AVDD 3.3V, +25oC, 1kHz signal, 48kHz, 24-bit audio data unless otherwise stated. PARAMETER Audio ADCs, DACs, Mixers Reference Input/Output Buffered Reference Output Microphone Bias Bias Voltage Bias Current Source Output Noise Voltage VMICBIAS IMICBIAS 20kHz 2.92 2.97 3.00 nV/Hz CAP2 VREF 1.63 1.64 1.65 1.65 1.66 1.67 SYMBOL TEST CONDITIONS UNIT
January 2006
Preliminary Technical Data
WM9713L
DIGITAL INTERFACE CHARACTERISTICS
Test Conditions DBVDD 3.3V, DCVDD 3.3V, +25oC, unless otherwise stated. PARAMETER Input HIGH level Input level Output HIGH level Output level Clock Frequency Master clock (MCLKA pin) AC'97 clock (BIT_CLK pin) AC'97 sync pulse (SYNC pin) Note: audio non-audio sample rates other timing scales proportionately with master clock. signal timing AC-Link, please refer AC'97 specification (Revision 2.2) 24.576 12.288 SYMBOL source current sink current TEST CONDITIONS UNIT
Digital Logic Levels (all digital input output pins) CMOS Levels
January 2006
WM9713L POWER CONSUMPTION
Preliminary Technical Data
power consumption WM9713L depends following factors: Supply voltages: Reducing supply voltages also reduces digital supply currents, therefore results significant power savings especially digital sections WM9713L. Operating mode: Significant power savings achieved always disabling parts WM9713L that used (e.g. audio ADC, DAC, touchpanel digitiser). Sample rates: Running lower sample rates will reduce power consumption significantly. figures below 48kHz (unless otherwise specified), many scenarios necessary this frequency, e.g. 8kHz voice call scenario uses only 11.4mW (see below).
MODE
AVDD Supply Current 0.01 0.014 0.042 2.37 3.644 3.733 4.801
DCVDD Supply Current 9.720
DBVDD Supply Current 0.005 0.005 0.005 0.006 2.974 2.789 2.814
Total Power (mW) 0.05 0.06 0.15 11.4 58.05 53.60 59.79
(lowest possible power) Clocks stopped. This default configuration after power-up. (Low Power Standby) VREF maintained using 1MOhm string Touchpanel only (waiting pen-down) Voice call (fs=8kHz) Record from mono microphone Stereo Playback link headphone) Stereo Playback link headphone) running with 13MHz input MCLKB Maximum Power everything Table Supply Current Consumption
10.973 10.504
13.656 15.472
2.938 105.82
Notes: Unless otherwise specified, figures +25C, audio sample rate 48kHz, with zero signal (quiescent), voltage references settled. power dissipated headphone, speaker touchpanel included above table.
January 2006
Preliminary Technical Data
WM9713L
DEVICE INTRODUCTION
WM9713L largely compatible upgrade WM9712, with voice codec added. This codec interfaced type audio interface which makes GPIO pins connection. designed meet mixed-signal requirements portable wireless smartphone systems. includes audio recording playback, touchpanel digitisation, battery monitoring, auxiliary GPIO functions, controlled through single 5-wire AC-Link interface. Additionally, voice codec functions supported through provision additional voice audio serial interface. included allow unrelated reference clocks used generation link system clock. Typically 13MHz 2.048MHz references might used reference.
SOFTWARE SUPPORT
basic audio features WM9713L software compatible with standard AC'97 device drivers. However, better support touchpanel other additional functions, Wolfson Microelectronics supplies custom device drivers selected CPUs operating systems. Please contact your local Wolfson Sales Office more information.
AC'97 COMPATIBILITY
WM9713L uses AC'97 interface communicate with microprocessor controller. audio GPIO functions largely compliant with AC'97 Revision 2.2. following differences from AC'97 standard noted: Pinout: function some pins been changed support device specific features. PHONE PCBEEP pins have been moved different locations device package. Package: default package WM9713L leadless package. Audio mixing: WM9713L handles audio functions smartphone, including audio playback, voice recording, phone calls, phone call recording, ring tones, well simultaneous these features. AC'97 mixer architecture does fully support this. WM9713L therefore uses modified AC'97 mixer architecture with three separate mixers. Tone Control, Bass Boost Enhancement: These functions implemented digital domain therefore affect only signals being played through audio DACs, output signals stipulated AC'97.
Some other functions additional AC'97: On-chip loudspeaker driver mono stereo speakers On-chip driver speaker (phone receiver) Auxiliary mono ring tones, system alerts etc. Touchpanel controller Auxiliary Inputs Analogue Comparators Battery Alarm Programmable Filter Characteristics Tone Control Enhancement interface additional Voice existing audio ADCs create AC'97 system clock from unrelated reference clock input
January 2006
WM9713L
CODEC
Preliminary Technical Data
voice codec functions typically required mobile telephony devices provided extra voice WM9713L, which interfaced standard type data interface, which constructed through optional GPIO pins WM9713L. audio output data from both audio ADCs also output over this interface, allowing full voice codec function implemented. This interface supports sample rates from 48ks/s using standard AC'97 master clock.
January 2006
Preliminary Technical Data
WM9713L
AUDIO PATHS OVERVIEW
WM9713 Analogue
Note: PGAs summers inverting
RECMUXR
40h:7 (Loopback) AC'97 Link Left Tone 40h:13 (3DE)
0Ch:12-8 00000 +12dB 11111 -34.5dB
MONOMIX
RECMUXL
PCBEEP
AUXDAC
MONOIN
HPMIXR
SPKMIX
HPMIXL
VXDAC
LINER
DACR
LINEL
DACL
MICA
MIC2
INV1
DACL slot
DACL
LINEL
MONOIN
0Ah:12-8 00000 +12dB 11111 -34.5dB
MICA
MICB
PCBEEP
-15dB
LINEL
08h:12-8 00000 +12dB 11111 -34.5dB
MICA
-15dB
10h:
PCBEEP
MONOIN
LINER
LINEL
Headphone Mixer
1Eh:15-13
INV2
MICB
-15dB
10h:4-0
5-11 14h:1
04h:12-8 00000 11111 -46.5dB
1Ch:7-6 HPMIXL
RECMUXL
-15dB
Zero-cross detect
MONOIN
RECMUXR
-15dB
Vmid
AUXDAC
-15dB
04h:14 (ZC) 04h:15 (MUTE)
VXDAC
-15dB
Link
PCBEEP
AUXDAC
MONOIN
SPKMIX VXDAC INV1 DACL
1Ch:13-11
VXDAC
RECMUXR RECMUXL LINER DACR LINEL DACL MICA MICB
HPMIXL
02h:12-8 00000 11111 -46.5dB
SPKL
Zero-cross detect
DACR
Vmid
LINEL
LINER -15dB
PCBEEP
16h7
02h:14 (ZC) 02h:15 (MUTE) MONO Mixer 08h:4-0 00000 11111 -46.5dB
1Ch:15-14
MICA
20dB
10h:7+5
10h:6
MONOMIX INV1
PCBEEP
0Eh:12-8 00000 +12dB 11111 -34.5dB
MICB
20dB
MONO
Zero-cross detect
RECMUXL
20dB
RECMUXR
20dB
Vmid
AUXDAC
-15dB
08h:6 (ZC) 08h:7 (MUTE)
VXDAC
-15dB
RECMUXR
PCBEEP
MONOIN
MONOMIX
RECMUXL
PCBEEP
AUXDAC
MONOIN
HPMIXR
LINER
LINEL
MICA
MICB
SPKMIX
HPMIXL
VXDAC
LINER
DACR
LINEL
DACL
MICA
MICB
INV1
INV2
06h:4-0 00000 11111 -46.5dB
1Ch:3-2 INV1
OUT3
Zero-cross detect
14h:5-3
12h:14 (GRL=0) 12h:11:8 0000 1111 +22.5dB 12h:14 (GRL=1) 12h:13-8 11111 +30dB 00000 -17.25dB
Vmid
14h:6 20dB
06h:6 (ZC) 06h:7 (MUTE) Variable Slot 5C:1-0 (ASS) 5C:3 (HPF) 5C:4 (ADCO) ALC:5Ch/60h/62h Vmid
Zero-cross detect
Sent Both Link AC'97 Link
1Ch:1-0 INV2
06h:12-8 00000 11111 -46.5dB
OUT4
06h:14 (ZC) 06h:15 (MUTE) 0Ch:4-0 00000 +12dB 11111 -34.5dB Tone 40h:13 (3DE)
RECMUXR
PCBEEP
PCBEEP
AUXDAC
MONOIN
MONOIN
HPMIXR
SPKMIX
HPMIXL
VXDAC
LINER
LINER
DACR
LINEL
LINEL
DACL
MICA
MICB
MICA
MICB
INV1
AC'97 Link Right
DACR slot
DACR
LINER
MONOIN
0Ah:4-0 00000 +12dB 11111 -34.5dB
PCBEEP
-15dB
-15dB
LINER
MICA -15dB
10h:4
Headphone Mixer 04h:4-0 00000 11111 -46.5dB
1Ch:5-4 HPMIXR
MICB
10h:4-0
15-11 14h: 5h:1
INV2
40h:7 (Loopback)
MONOMIX
RECMUXL
RECMUXL
-15dB
Zero-cross detect
-15dB RECMUXR -15dB AUXDAC -15dB
Vmid
04h:6 (ZC) 04h:7 (MUTE)
Vmid AC'97 Link Resistor string 2Eh/64h
RECMUXR RECMUXL PCBEEP AUXDAC MONOIN VXDAC LINER DACR LINEL DACL MICA MICB
VXDAC
HPMIXR SPKMIX INV2 LINEL
Vmid
22h: 13-12
22h:11-10 +12dB +30dB
1Ch:10-8
MIC1
02h:4-0 00000 11111 -46.5dB
SPKR
Zero-cross detect
LINER
MIC2A
Vmid
DACL
DACR
0Ch:1
Vmid Speaker Mixer
02h:6 (ZC) 02h:7 (MUTE)
MIC2B
22h:9-8 +12dB +30dB
MONOIN
08h:14
-15dB
0Eh:4-0 00000 +12dB 11111 -34.5dB
PCBEEP -15dB
AUXDAC
MICCM
PCBEEP MONOIN LINER LINEL MICA MICB
16h:1
-15dB VXDAC MONOMIX
HPMIXR
SPKMIX
HPMIXL
INV1
14h:2-0
Variable Slot 5C:1-0 (ASS) 5C:3 (HPF) 5C:4 (ADCO) ALC:5Ch/60h/62h
Sent Both Link AC'97 Link
LINEL
MONOIN
PCBEEP
LINER
MICA
MICB
1Eh:12-10
12h:6 (GRR=0) 12h:3:0 0000 1111 +22.5dB 12h:6 (GRR=1) 12h:5-0 11111 +30dB 00000 -17.25dB
PCBEEP
LINER
DACR
DACL
LINEL
MICA
MICB
RECMUXL
MONOIN
RECMUXR
14h:6 20dB
AUXDAC
VXDAC
INV1
HPMIXL
Code
Audio ADCs record Stereo Input PGAs mixers Refs, input PGAs, mixers output PGAs Output PGAs
Note: bits active i.e. "ON"; "OFF" Enable when (PR0 PR2) loAVDD AGND VREF
MONOMIX
HPMIXR
SPKMIX
INV2
INV2
VMICBIAS
Figure Audio Paths Overvie
January 2006
WM9713L
CLOCK GENERATION
Preliminary Technical Data
WM9713L supports clocking from separate sources, which selected AC'97 interface: External clock input MCLKA External clock input MCLKB
source clock divided appropriate frequencies order AC'97 interface, interface, voice Hi-fi means programmable divider block. Clock rates changed during operation AC'97 link order support alternative modes, example power mode when voice data being transmitted only. present flexibility selection input clock frequencies, typical choices being 2.048MHz, 4.096MHz 13MHz. Default mode power-up assumes clock will present MCLKA with powered down. This enables data clocked AC'97 link define desired clock divider mode whether needs activated. Note: This clock available frequency. When muxing between MCLKA MCLKB both clocks must active least clock cycles after switching event.
CLOCK DIVISION MODES
Figure shows clocking strategy WM9713L. Clocking controlled CLK_MUX, CLK_SRC S[6:0]. CLKAX2, CLKBX2 clock doublers inputs MCLKA MCLKB. CLK_MUX selects between MCLKA MCLKB. CLK_SRC selects between external derived clock reference. S[3:0] sets voice clock rate interface clock when master mode (division ratio available). S[6:4] sets hi-fi clocking rate (division ratio available).
registers used these switches accessed from register address (see Table mode change requires switching from external clock generated clock then recommended clock division ratios required clock scheme prior switching between clocks. This option accommodated means sets registers SPLL[6:0] SEXT[6:0]. selected (CLK_SRC S[6:0] SPLL[6:0], external clock selected (CLK_SRC S[6:0] SEXT[6:0]. SEXT[6:0] defined register address 44h. SPLL[6:0] defined register (see Table which also contains number separate control bits relating PLL's function. Writing registers enables pre-programming required clock mode before output selected.
January 2006
Preliminary Technical Data
WM9713L
Figure Clocking Architecture WM9713L
January 2006
WM9713L
Preliminary Technical Data Clock mode division ratios controlled register shown Table REGISTER ADDRESS 14:12 LABEL SEXT[6:4] DEFAULT (div DESCRIPTION Defines clock division ratio Hi-fi: DSP, ADCs DACs 000: 001: 111: Defines clock division ratio interface voice DAC: 0000: 0001: 1111: f/16 Selects between clock External clock clock external clock Sets PENADC clock divisor 000: f/16 001: f/12 010: 011: 100: 101: 110: 111: Clock doubler MCLKB Clock doubler MCLKA Selects between MCLKA MCLKB (N.B. power-up clock must present MCLKA must active clock cycles after switching MCLKB) SYSCLK=MCLKA SYSCLK=MCLKB
11:8
SEXT[3:0]
0000 (div
CLKSRC
(ext clk)
PENDIV
(div
CLKBX2 CLKAX2 CLKMUX
(Off) (Off) (MCLKA)
Table Clock Muxing Division Control
INTERNAL CLOCK FREQUENCIES
internal clock frequencies defined follows (refer Figure AC97 nominally 24.576MHz, used generate AC97 BITCLK 12.288MHz. HIFI HIFI playback 48ks/s HIFI 24.576MHz. Table voice only playback. Table sample rate clock frequency. SAMPLE RATE 8ks/s voice HIFI 8ks/s voice only (power save) 16ks/s voice HIFI 16ks/s voice only (power save) 32ks/s voice HIFI 48ks/s voice HIFI Table Clock Division Mode Table FREQUENCY 2.048MHz 2.048MHz 4.096MHz 4.096MHz 8.192MHz 12.288MHz HIFI FREQUENCY 24.576MHz 4.096MHz 24.576MHz 8.192MHz 24.576MHz 24.576MHz
January 2006
Preliminary Technical Data
WM9713L
clock PENADC nominally runs 768kHz derived from BITCLK. divisor clock generator PENDIV. This enables PENADC clock frequency according power consumption conversion rate considerations.
MODE
operation controlled register (see Table modes operation: Integer Fractional
been optimized nominal input clock (PLL_IN) frequencies range 8.192MHz 19.661MHz (LF=0) 2.048MHz 4.9152MHz (LF=1). Through clock divider (div input frequencies 78.6MHz accommodated. input clock divider enabled DIVSEL (0=Off) division ratio DIVCTL (0=div2, 1=div4).
Figure Architecture REGISTER ADDRESS 15:12 LABEL N[3:0] DIVSEL DIVCTL PGADDR PGDATA DEFAULT 0000 0000 DESCRIPTION integer division control (must between 5-12 integer mode) Allows operation with frequency input clocks 8.192MHz) Sigma Delta Modulator enable. Allows fractional division Enables input clock divided input clock above 14.4MHz Controls division mode when DIVSEL high. Pager address bits access programming K[21:0] SPLL[7:0] Pager data bits
Table Clock Control
January 2006
WM9713L
INTEGER MODE
Preliminary Technical Data
nominal output frequency (PLL_OUT) 98.304MHz which divided achieve nominal system clock 24.576MHz. integer division ratio determined FPLL_out FPLL_IN N[3:0] must range integer operation (0101 1100 12). Note that setting LF=1 enables further division required input frequencies range 2.048MHz 4.096MHz. Integer mode selected setting SDM=0.
FRACTIONAL MODE
Fractional mode provides divide resolution 1/222 K[21:0] (register 46h, section Register Page Address Mapping). relationship between required division fractional division K[21:0] integer division N[3:0]
where rounded nearest whole number. example, PLL_IN clock 13MHz desired PLL_OUT clock 98.304MHz then desired division, 7.5618. N[3:0] will K[21:0] will 23F488h produce desired 98.304MHz clock (see Table INPUT CLOCK (PLL_IN) DESIRED OUTPUT (PLL_OUT) 98.304MHz 98.304MHz 98.304MHz 98.304MHz 98.304MHz DIVISION REQUIRED 7.5618 7.2818 FRACTIONAL DIVISION INTEGER DIVISION
2.048MHz 4.096MHz 12.288MHz 13MHz 27MHz (13.5MHz)**
0.5618 0.2818
12x4* 6x4*
*Divide enabled feedback path frequency inputs. **Divide enabled input frequencies 14.4MHz 38MHz (DIVSEL DIVCTL Table Modes Operation
REGISTER PAGE ADDRESS MAPPING
clock division control bits SPLL[6:0] fractional division bits accessed through register using sub-page address system. pager address allows blocks data words accessed whilst register address 46h. This means that when register address selected further cycles programming required page data bits. Control allocation these page addresses described Table PAGE ADDRESS 31:28 27:24 23:22 21:20 19:16 15:12 11:8 LABEL SPLL[6:4] SPLL[3:0] SPARE K[21:0] DEFAULT DESCRIPTION Clock division control SPLL[6:0]. Clock divider reads this control word enabled Spare control bits Sigma Delta Modulator control word fractional division. Division resolution 1/222
Table Pager Control Allocation
January 2006
Preliminary Technical Data
WM9713L
Powerdown internal clocks registers (see Table REGISTER ADDRESS LABEL DEFAULT (Off) (Off) DESCRIPTION Internal clock disable (active high) powerdown (active high)
N.B. both must asserted before enabled Table Powerdown Control
DATA CONTROL INTERFACE
WM9713L interfaces, data control AC'97 interface data only interface. AC'97 interface available through dedicated pins (SDATAOUT, SDATAIN, SYNC, BITCLK RESETB) sole control interface with access data streams device except Voice DAC. interface available through GPIO pins (PCMCLK, PCMFS, PCMDAC PCMADC) provides access Voice DAC. also transmit data from Stereo ADC. This useful, example, allow both sides phone conversation recorded mixing transmit receive paths channels transmitting over interface.
AC97 INTERFACE
INTERFACE PROTOCOL
WM9713Lhas single AC'97 interface both data transfer control. AC-Link uses wires: SDATAIN (pin carries data from WM9713L controller SDATAOUT (pin carries data from controller WM9713L BITCLK (pin clock, derived from either MCLKA MCLKB inputs supplied controller. SYNC synchronization signal generated controller passed WM9713L RESETB resets WM9713L default state
Figure AC-Link Interface (typical case with BITCLK generated AC97 codec) SDATAIN SDATAOUT signals each carry time-division multiplexed data streams (slots 12). complete sequence slots referred AC-Link frame, contains total bits. frame rate 48kHz. This makes possible simultaneously transmit receive multiple data streams (e.g. audio, touchpanel, AUXDAC, control) sample rates 48kHz. Detailed information found AC'97 (Revision 2.2) specification, which obtained www.intel.com/labs/media/audio/
January 2006
WM9713L
Note:
Preliminary Technical Data
SDATAOUT SYNC must held when RESETB applied. These signals must held entire duration RESETB pulse especially during low-to-high transition RESETB. either high during reset AC'97 device enter test modes. Information relating this operation available AC'97 specification Wolfson applications note WAN0104 available www.wolfsonmirco.com.
INTERFACE
OPERATION
WM9713L implement voice codec function using dedicated VXDAC either both existing hi-fi ADC's. codec mode, VXDAC input output interfaced style port GPIO pins. This interface support channel, stereo/dual channels required, (two channels data sent frame back back words). voice only mode, link used only control information, audio data. Therefore will generally shut down (PR4=1), except when control data must sent. interface makes GPIO interface pins, clock, frame, data in/out. codec function enabled then GPIO pins used other functions WM9713L
INTERFACE PROTOCOL
WM9713L audio interface used input data Voice output data from Stereo ADC. When enabled, audio interface uses four GPIO pins: GPIO1/PCMCLK: clock GPIO3/PCMFS: Frame Sync GPIO4/PCMDAC: Voice data input GPIO5/PCMADC: Stereo data output
When enabled GPIOs used other functions WM9713L.
INTERFACE MODES
WM9713L audio interface configured four modes: Disabled Mode: WM9713L disables tri-states interface pins. clock input ignored ADC/DAC data transferred. Slave Mode: WM9713L accepts PCMCLK PCMFS inputs from external source. Master Mode: WM9713L generates PCMCLK PCMFS outputs. Partial Master Mode: WM9713L generates PCMCLK output, accepts PCMFS external input.
AUDIO DATA FORMATS
Four different audio data formats supported: mode Left justified Right justified
four these modes first. They described below. Refer Electrical Characteristic section timing information. Interface configured Mono mode, where only channel data output. this mode interface should configured mode. short long frame sync
January 2006
Preliminary Technical Data
WM9713L
supported available either (mode (mode rising edge VXCLK. Note that when operating stereo mode mono Voice always uses left channel data input.
1/fs PCMCLK
PCMFS
PCMCLK
PCMADC/ PCMDAC
Input Word Length (WL)
Figure Interface Mono Mode (mode FSP=0)
1/fs PCMCLK
PCMFS
PCMCLK
PCMADC/ PCMDAC
Input Word Length (WL)
Figure Interface Mono Mode (mode FSP=1) mode, left channel available either (mode (mode rising edge PCMCLK (selectable FSP) following rising edge PCMFS. Right channel data immediately follows left channel data. Depending word length, PCMCLK frequency sample rate, there unused PCMCLK cycles between right channel data next sample.
January 2006
WM9713L
1/fs BCLK VXCLK
Preliminary Technical Data
PCMFS
PCMCLK
LEFT CHANNEL PCMADC/ PCMDAC
RIGHT CHANNEL
Input Word Length (WL)
Figure Mode Audio Interface (mode FSP=0)
1/fs BCLK VXCLK
PCMFS
PCMCLK
LEFT CHANNEL PCMADC/ PCMDAC
RIGHT CHANNEL
Input Word Length (WL)
Figure Mode Audio Interface (mode FSP=1) Left Justified mode, available first rising edge PCMCLK following PCMFS transition. other bits then transmitted order. Depending word length, PCMCLK frequency sample rate, there unused PCMCLK cycles before each PCMFS transition.
1/fs
LEFT CHANNEL PCMFS
RIGHT CHANNEL
PCMCLK
PCMADC/ PCMDAC
Figure Left Justified Audio Interface (assuming n-bit word length) Right Justified mode, available last rising edge PCMCLK before PCMFS transition. other bits transmitted before (MSB first). Depending word length, PCMCLK frequency sample rate, there unused PCMCLK cycles after each PCMFS transition.
January 2006
Preliminary Technical Data
WM9713L
1/fs
LEFT CHANNEL PCMFS
RIGHT CHANNEL
PCMCLK
PCMADC PCMDAC
Figure Right Justified Audio Interface (assuming n-bit word length) mode, available second rising edge PCMCLK following PCMFS transition. other bits then transmitted order. Depending word length, PCMCLK frequency sample rate, there unused PCMCLK cycles between sample next.
1/fs
LEFT CHANNEL PCMFS
RIGHT CHANNEL
PCMCLK
BCLK BCLK
PCMADC/ PCMDAC
Figure Justified Audio Interface (assuming n-bit word length)
CONTROL
register bits controlling audio format, word length operating modes summarised below. CTRL must override normal interface pins GPIOs, MODE must specify master/slave modes. REGISTER ADDRESS Control LABEL CTRL DEFAULT DESCRIPTION Sets function control registers GPIO interface pins. GPIO pins GPIOs GPIO pins configured interface controlled this register interface mode when CTRL=1 interface disabled [PCMCLK tristated, PCMFS tri-stated] interface slave mode [PCMCLK input, PCMFS input] interface master mode [PCMCLK output, PCMFS output] interface partial master mode [PCMCLK output, PCMFS input]
14:13
MODE
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WM9713L
REGISTER ADDRESS 11:9 LABEL DEFAULT
Preliminary Technical Data DESCRIPTION Voice clock PCMCLK divider. master mode PCMCLK derived from Voice clock. PCMCLK Voice clock PCMCLK Voice clock PCMCLK Voice clock PCMCLK Voice clock PCMCLK Voice clock VXDAC oversample rate: PCMCLK polarity invert PCMCLK polarity normal PCMCLK polarity Right, Left modes PCMFS polarity invert PCMFS polarity normal PCMFS polarity Mode mode select available PCMCLK rising edge after rising edge (mode available PCMCLK rising edge after rising edge (mode channel select Output left right data Swap output left right data Output left data only Output right data only Data Word Length bits (see Note) bits bits bits Data Format Select Mode Format Left justified Right justified
VDACOS
Table Codec Control Note: Right justified does support 32-bit data.
January 2006
Preliminary Technical Data
WM9713L
AUDIO ADCS
STEREO
WM9713L stereo sigma-delta digitize audio signals. achieves high quality audio recording power consumption. sample rate controlled writing control register (see "Variable Rate Audio"). independent sample rate. save power, left right ADCs separately switched using Powerdown bits ADCL ADCR (register 3Ch, bits 5:4), whereas disables both ADCs (see "Power Management" section). only running, same data appears both left right AC-Link slots. output from sent over either link usual, output interface which configured GPIO pins.
HIGH PASS FILTER
WM9713L audio incorporates digital high pass filter that eliminates bias from output data. filter enabled default. measurements, disabled writing (register 5Ch, This high pass filter corner frequency selected have different values WM9713L, suit applications such voice where higher cutoff frequency required. REGISTER ADDRESS LABEL HPMODE DEFAULT DESCRIPTION corner frequency Fs=48kHz 82Hz Fs=16kHz 82Hz Fs=8kHz 170Hz Fs=8kHz
Note: filter corner frequency proportional sample rate. Table Highpass Filter Frequency Control
SLOT MAPPING
default, output left audio appears slot SDATAIN signal (pin right data appears slot However, output data also sent other slots, setting (ADC slot select) control bits shown below. REGISTER ADDRESS Additional Functions LABEL DEFAULT DESCRIPTION slot mapping Left Slot Right Slot (default) Left Slot Right Slot Left Slot Right Slot Left Slot Right Slot High-pass filter disable Filter enabled (for audio) Filter disabled (for measurements)
Table Control
January 2006
WM9713L
RECORD SELECTOR
Preliminary Technical Data
record selector determines which input signals routed into audio ADC. left right channels selected independently. This useful recording phone call: channel used signal other signal, that both sides conversation digitized. REGISTER ADDRESS Record Routing Select LABEL RECBST DEFAULT DESCRIPTION 20dB Boost Boost input signal 20dB boost Left signal source 000: MICA (pre-PGA) 001: MICB (pre-PGA) 010: LINEL (pre-PGA) 011: MONOIN (pre-PGA) 100: Headphone (left) 101: Speaker 110: Mono 111: Reserved this setting) Right signal source 000: MICA (pre-PGA) 001: MICB (pre-PGA) 010: LINER (pre-PGA) 011: MONOIN (pre-PGA) 100: Headphone (right) 101: Speaker 110: Mono 111: Reserved this setting)
RECSL
RECSR
Table Audio Record Selector
January 2006
Preliminary Technical Data
WM9713L
RECORD GAIN
amplitude signal that enters audio controlled Record (Programmable Gain Amplifier). gain programmed either writing Record Gain register, Automatic Level Control (ALC) circuit (see next section). When enabled, writes Record Gain register have effect. different gain ranges implemented: standard gain range defined AC'97 standard, extended gain range with smaller gain steps. circuit always uses extended gain range, this been found result better sound quality. REGISTER ADDRESS Record Gain LABEL DEFAULT DESCRIPTION Mute Audio (both channels) Mute (OFF) Mute (ON) Gain range select (left) Standard 22.5dB, 1.5dB step size) Extended (-17.25 +30dB, 0.75dB steps) Record Volume (left) Standard (GRL=0) XX0000: XX0001: +1.5dB (1.5dB steps) XX1111: +22.5dB Extended (GRL=1) 000000: -17.25dB 000001: -16.5dB (0.75dB steps) 111111: +30dB
13:8
RECVOLL
000000
Zero Cross Enable Record Gain changes immediately Record Gain changes when signal zero after time-out Gain range select (right) Similar Record Volume (right) Similar RECVOLR
RECVOLR
000000
Table Record Gain Register output Record also mixed into phone and/or headphone outputs (see "Audio Mixers"). This makes possible function microphone signal smartphone application. REGISTER ADDRESS Record Routing 15:14 LABEL DEFAULT (mute) DESCRIPTION Controls record headphone mixer paths. 00=stereo, 01=left only, 10=right only, 11=mute left right Controls gain record headphone mixer paths. 000: +6dB 001: +3dB (3dBsteps) 111: -15dB Controls record mono mixer path. 00=stereo, 01=left only, 10=right only, 11=mute left right Enables 20dB gain boost record mono mixer path
13:11
R2HVOL
(0dB)
10:9
(mute)
R2MBST
(OFF)
Table Record Routing Control
January 2006
WM9713L
AUTOMATIC LEVEL CONTROL
Preliminary Technical Data
WM9713L automatic level control that aims keep constant recording volume irrespective input signal level. This achieved continuously adjusting gain that signal level input remains constant. digital peak detector monitors output changes gain necessary.
input signal
gain
signal after
target level
hold time
decay time
attack time
Figure Operation function enabled using ALCSEL control bits. When enabled, recording volume programmed between -6dB -28.5dB (relative full scale) using ALCL register bits. HLD, control hold, decay attack times, respectively.
HOLD TIME
Hold time time delay between peak level detected being below target gain beginning ramp programmed power-of-two (2n) steps, e.g. 2.67ms, 5.33ms, 10.67ms etc. 43.7s. Alternatively, hold time also zero. hold time only applies gain ramp-up, there delay before ramping gain down when signal level above target.
DECAY (GAIN RAMP-UP) TIME
Decay time time that takes gain ramp across range (e.g. from -15B 27.75dB). time takes recording level return target value therefore depends both decay time gain adjustment required. gain adjustment small, will shorter than decay time. decay time programmed power-of-two (2n) steps, from 24ms, 48ms, 96ms, etc. 24.58s.
January 2006
Preliminary Technical Data
WM9713L
ATTACK (GAIN RAMP-DOWN) TIME
Attack time time that takes gain ramp down across range (e.g. from 27.75dB down -15B gain). time takes recording level return target value therefore depends both attack time gain adjustment required. gain adjustment small, will shorter than attack time. attack time programmed power-of-two (2n) steps, from 6ms, 12ms, 24ms, etc. 6.14s. When operating stereo, peak detector takes maximum left right channel peak values, gain setting applied both left right PGAs, that stereo image preserved. However, function also enabled channel only. this case, only controlled mechanism, while other channel runs independently with gain through control register. When channel unused, peak detector disregards that channel. function also operate when outputs mixed mono digital domain, they mixed mono analogue domain, before entering ADCs.
January 2006
WM9713L
REGISTER ADDRESS Noise Gate Control 15:14 LABEL ALCSEL DEFAULT (OFF)
Preliminary Technical Data DESCRIPTION function select (PGA gain register) Right channel only Left channel only Stereo (PGA registers unused) gain limit +30dB +24dB .(6dB steps) -6dB -12dB Programmable zero cross timeout (delay 12.288MHz BITCLK): 2^17 tbitclk (10.67 2^16 tbitclk (5.33 2^15 tbitclk (2.67 2^14 tbitclk (1.33 target sets signal level input 0000 -28.5dB 0001 -27.0dB (1.5dB steps) 1110 -7.5dB 1111 -6dB hold time before gain increased. 0000 0001 2.67ms 0010 5.33ms (time doubles with every step) 1111 43.691s decay (gain ramp-up) time 0000 24ms 0001 48ms 0010 96ms (time doubles with every step) 1010 higher 24.58s attack (gain ramp-down) time 0000 0001 12ms 0010 24ms (time doubles with every step) 1010 higher 6.14s
13:11
MAXGAIN
(+30dB)
10:9
ZCTIMEOUT
Control
15:12
ALCL
1011 (-12dB)
11:8
0000 (0ms)
0011 (192ms)
0010 (24ms)
Table Control
MAXIMUM GAIN
MAXGAIN register sets maximum gain value that whilst under control ALC. This effect when enabled.
January 2006
Preliminary Technical Data
WM9713L
PEAK LIMITER
prevent clipping when large signal occurs just after period quiet, circuit includes limiter function. input signal exceeds 87.5% full scale (-1.16dB), gain ramped down maximum attack rate when 0000), until signal level falls below 87.5% full scale. This function automatically enabled whenever enabled. (Note: 0000, then limiter makes difference operation ALC. designed prevent clipping when long attack times used).
NOISE GATE
When signal very quiet consists mainly noise, function cause "noise pumping", i.e. loud hissing noise during silence periods. WM9713L noise gate function that prevents noise pumping comparing signal level input pins (i.e. before record PGA) against noise gate threshold, NGTH. Provided that noise gate function enabled (NGAT noise gate cuts when: Signal level [dB] NGTH [dB] gain [dB] Boost gain [dB] This equivalent Signal level input [dB] NGTH [dB] gain then held constant (preventing from ramping normally would when signal quiet). set, output also muted when noise gate cuts table below summarises noise gate control register. NGTH control bits noise gate threshold with respect full-scale range. threshold adjusted 1.5dB steps. Levels extremes range cause inappropriate operation, care should taken with set-up function. Note that noise gate only works conjunction with function, always operates same channel(s) (left, right, both, none). REGISTER ADDRESS Noise Gate Control LABEL NGAT DEFAULT DESCRIPTION Noise gate function enable enable disable Noise gate type gain held constant mute output Noise gate threshold 00000: -76.5dBFS 00001: -75dBFS steps 11110: -31.5dBFS 11111: -30dBFS
NGTH(4:0)
00000
Table Noise Gate Control
January 2006
WM9713L AUDIO DACS
STEREO
Preliminary Technical Data
WM9713L stereo sigma-delta that achieves high quality audio playback power consumption. Digital tone control, adaptive bass boost enhancement functions operate digital audio data before passed stereo DAC. (Contrary AC'97 specification, they have effect analogue input signals signals played through auxiliary DAC. Nevertheless, bits reset register, 00h, indicate that WM9713L supports tone control bass boost.) output volume control. sample rate controlled writing control register (see "Variable Rate Audio"). independent sample rate. When DACs separately powered down using Powerdown register bits DACL DACR (register 3Ch, bits [7:6]).
STEREO VOLUME
volume output signal controlled (Programmable Gain Amplifier). Each mixed into headphone, speaker mono mixer paths (see "Audio Mixers") controlled register 0Ch. Each DAC-to-mixer path independent mute bit. When DAC-to-mixer paths muted muted automatically. When PGAs powered down using Powerdown register bits DACL DACR (register 3Ch, bits [7:6]). REGISTER ADDRESS Volume 12:8 LABEL DACL DEFAULT 01000 (0dB) DESCRIPTION Mute path headphone mixer Mute, mute (ON) Mute path speaker mixer Mute, mute (ON) Mute path mono mixer Mute, mute (ON) Left Volume 00000: +12dB (1.5dB steps) 11111: -34.5dB Right Volume similar DACLVOL Read-only indicate auto-muting auto-muted muted Auto-Mute Enable Automatically mutes analogue output stereo digital input zero Auto-mute
Additional Functions
DACR AMUTE
01000 (0dB)
AMEN
Table Stereo Volume Control
January 2006
Preliminary Technical Data
WM9713L
TONE CONTROL BASS BOOST
WM9713L provides separate controls bass treble with programmable gains filter characteristics. This function operates digital audio data before passed audio DACs. Bass control take different forms: Linear bass control: bass signals amplified attenuated user programmable gain. This independent signal volume, very high bass gains loud signals lead signal clipping. Adaptive bass boost: bass volume amplified variable gain. When bass volume low, boosted more than when bass volume high. This method recommended because prevents clipping, usually sounds more pleasant human ear.
Treble control applies user programmable gain, without adaptive boost function. Treble, linear bass enhancement produce signals that exceed full-scale. order avoid limiting under these conditions, recommended attenuate digital input signal 6dB. gain outputs should increased compensate attenuation. Cut-only tone adjustment adaptive bass boost cannot produce signals above fullscale therefore require set. REGISTER ADDRESS Tone Control LABEL DEFAULT DESCRIPTION Bass Mode Linear bass control Adaptive bass boost Bass Cut-off Frequency (130Hz 48kHz sampling) High (200Hz 48kHz sampling) Bass Intensity Code 0000 0001 0010 0111 1011-1101 1110 1111 BB=0 +9dB +9dB +7.5dB (1.5dB steps) (1.5dB steps) -6dB -6dB Bypass (OFF) BB=1 (max) (min)
11:8
BASS
1111 (OFF)
-6dB attenuation Treble Cut-off Frequency High (8kHz 48kHz sampling) (4kHz 48kHz sampling) Treble Intensity 0000 0001 +9dB 0010 +7.5dB (1.5dB steps) 1011 1110 -6dB 1111 Treble Control Disabled
TRBL
1111 (Disabled)
Table Tone Control Note: cut-off frequencies change proportionally with sample rate.
January 2006
WM9713L
STEREO ENHANCEMENT
Preliminary Technical Data
stereo enhancement function artificially increases separation between left right channels amplifying (L-R) difference signal frequency range where human sensitive directionality. programmable depth setting controls degree stereo expansion introduced function. Additionally, upper lower limits frequency range used enhancement selected using 3DFILT control bits. REGISTER ADDRESS General Purpose Control LABEL DEFAULT (disabled) DESCRIPTION enhancement enable
3DLC
Lower Cut-off Frequency (200Hz 48kHz sampling) High (500Hz 48kHz sampling) Upper Cut-off Frequency High (2.2kHz 48kHz sampling) (1.5kHz 48kHz sampling) Depth 0000: (minimum effect) 0001: 6.67% .(6.67% steps) 1110: 93.3% 1111: 100% (maximum)
3DUC
3DDEPTH
0000
Table Stereo Enhancement Control Note: cut-off frequencies change proportionally with sample rate.
VOICE
VXDAC 16-bit mono intended playback voice signals input interface. Performance been optimised operating 8ks/s 16ks/s. VXDAC will function other sample rates 48ks/s, this recommended. analogue output VXDAC routed directly into output mixers. signal gain into each mixer adjusted mixer inputs using control register 18h. When VXDAC powered down using Powerdown register VXDAC (register 3Ch, 12).
January 2006
Preliminary Technical Data REGISTER ADDRESS Powerdown VXDAC Output Control LABEL VXDAC DEFAULT
WM9713L
DESCRIPTION VXDAC powerdown OFF, Mute VXDAC path headphone mixer Mute, mute (ON) VXDAC headphone mixer gain 000: +6dB (3dB steps) 111: -15dB Mute VXDAC path speaker mixer Mute, mute (ON) VXDAC speaker mixer gain 000: +6dB (3dB steps) 111: -15dB Mute VXDAC path mono mixer Mute, mute (ON) VXDAC mono mixer gain 000: +6dB (3dB steps) 111: -15dB
14:12
V2HVOL
(0dB)
10:8
V2SVOL
(0dB)
V2MVOL
(0dB)
Table VXDAC Control
AUXILIARY
AUXDAC simple 12-bit mono DAC. used generate signals (with numeric input written into control register), signals such telephone-quality ring tones system beeps (with input signal supplied through AC-Link slot). mode (XSLE input data binary offset coded; mode (XSLE there offset. analogue output AUXDAC routed directly into output mixers. signal gain into each mixer adjusted mixer inputs using control register 12h. slot mode (XSLE AUXDAC also supports variable sample rates (See "Variable Rate Audio" section). When auxillary powered down using Powerdown register AUXDAC (register 3Ch, 11).
January 2006
WM9713L
REGISTER ADDRESS Powerdown AUXDAC Input Control LABEL AUXDAC XSLE DEFAULT
Preliminary Technical Data DESCRIPTION AUXDAC powerdown OFF, AUXDAC input selection from AUXDACVAL (for signals) from AC-Link slot selected AUXDACSLT (for signals) AUXDAC Input Selection Slot bits 8-19 (with XSLE=1) Slot bits 8-19 (with XSLE=1) Slot bits 8-19 (with XSLE=1) Slot bits 8-19 (with XSLE=1) Slot bits 8-19 (with XSLE=1) Slot bits 8-19 (with XSLE=1) Slot bits 8-19 (with XSLE=1) RESERVED use) AUXDAC Digital Input (with XSLE=0) 000h: minimum FFFh: full-scale Mute AUXDAC path headphone mixer Mute, mute (ON) AUXDAC headphone mixer gain 000: +6dB (3dB steps) 111: -15dB Mute AUXDAC path speaker mixer Mute, mute (ON) AUXDAC speaker mixer gain 000: +6dB (3dB steps) 111: -15dB Mute AUXDAC path mono mixer Mute, mute (ON) AUXDAC mono mixer gain 000: +6dB (3dB steps) 111: -15dB
14:12
AUXDAC
11:0
AUXDAC
000h
AUXDAC Output Control
14:12
A2HVOL
(0dB)
10:8
A2SVOL
(0dB)
A2MVOL
(0dB)
Table AUXDAC Control
January 2006
Preliminary Technical Data
WM9713L
VARIABLE RATE AUDIO SAMPLE RATE CONVERSION
using AC'97 Rev2.2 compliant audio interface, WM9713L record playback commonly used audio sample rates, offer full split-rate support (i.e. DAC, AUXDAC sample rates completely independent each other combination possible). default sample rate 48kHz. register set, then other sample rates selected writing registers 2Ch, 2Eh. AC-Link continues frames second irrespective sample rate selected. However, sample rate less than 48kHz, then some frames carry audio sample. REGISTER ADDRESS Extended Audio Stat/Ctrl Audio Sample Rate LABEL DEFAULT (OFF) DESCRIPTION Variable Rate Audio (DAC 48kHz) (sample rates determined registers 32h) Audio sample rate 1F40h: 8kHz 2B11h: 11.025kHz 2EE0h: 12kHz 3E80h: 16kHz 5622h: 22.05kHz 5DC0h: 24kHz 7D00h: 32kHz AC44h: 44.1kHz BB80h: 48kHz other value defaults nearest supported sample rate Audio sample rate similar DACSR AUXDAC sample rate similar DACSR
15:0
DACSR
BB80h (48kHz)
Audio Sample Rate AUXDAC Sample Rate
15:0
ADCSR
BB80h (48kHz) BB80h (48kHz)
15:0
AUXDA
Table Audio Sample Rate Control
January 2006
WM9713L AUDIO INPUTS
Preliminary Technical Data
following sections give overview analogue audio input pins their function. more information recommended external components, please refer "Applications Information" section.
LINE INPUT
LINEL LINER inputs designed record line level signals, and/or into analogue outputs. Both pins directly connected record selector. record adjusts recording volume, controlled register function. analogue mixing, line input signals pass through separate PGA, controlled register 0Ah. signals mixed into headphone, speaker mono mixer paths (see "Audio Mixers"). Each LINE-to-mixer path independent mute bit. When LINE-to-mixer paths muted line muted automatically. When line inputs used, line switched save power (see "Power Management" section). LINEL LINER biased internally reference voltage VREF. Whenever inputs muted device placed into standby mode, inputs remain biased VREF using special antithump circuitry suppress audible clicks when changing inputs. REGISTER ADDRESS 12:8 LABEL LINEL DEFAULT 01000 (0dB) DESCRIPTION Mute LINE path headphone mixer Mute, mute (ON) Mute LINE path speaker mixer Mute, mute (ON) Mute LINE path mono mixer Mute, mute (ON) LINEL input gain 00000: +12dB (1.5dB steps) 11111: -34.5dB LINER input gain similar LINELVOL
LINER
01000 (0dB)
Table Line Input Control Additionally, line inputs used single-ended microphone inputs through record provide clickless function bypassing offset introduced through microphone pre-amps. Note that line inputs mixers should deselected this input configuration used.
MICROPHONE INPUT
MICROPHONE PRE-AMPS
There microphone pre-amplifiers which configured variety ways accommodate selectable differential microphone inputs differential microphone inputs stereo noise cancellation. microphone input circuit shown Figure
January 2006
Preliminary Technical Data
Vmid
WM9713L
MIC1
Vmid 22h: 13-12
22h:11-10 +12dB +30dB
MIC2A
Vmid
MICA MICB
MIC2B
22h:9-8 +12dB +30dB
MICCM
Figure Microphone Input Circuit input pins used microphones MIC1, MICCM, MIC2A MIC2B. Note that input pins MIC2A MIC2B multi-function inputs must configured microphone inputs when required. This achieved using MICCMPSEL[1:0] register (see Table 23). input microphone pre-amp selected from three microphone inputs MIC1, MIC2A MIC2B using MPASEL[1:0]. Each pre-amp independent boost control from +12dB +30dB four steps. This controlled MPABST[1:0] MPBBST[1:0]. When each microphone pre-amp powered down using Powerdown register bits (register 3Eh, bits [1:0]). When disabled inputs tied Vmid (for MIC2A MIC2B this only applies when they selected microphone inputs, otherwise they left floating). REGISTER ADDRESS 15:14 LABEL MICCMPSEL DEFAULT DESCRIPTION MIC2A MIC2B configuration MIC2A MIC2B microphone inputs MIC2A only MIC2B only neither MICA pre-amp input select MIC1 MIC2A MIC2B unused select) MICA pre-amp gain control +12dB +18dB +24dB +30dB MICB pre-amp gain control +12dB +18dB +24dB +30dB
13:12
MPASEL
11:10
MPABST
MPBBST
Table Microphone Pre-amp Control
January 2006
WM9713L
SINGLE OPERATION
Preliminary Technical Data
three microphones connected single-ended configuration. three MICs selected input using MPASEL[1:0] (Register 22h, bits 13:12). Only microphone MIC2B selected MPB. Note that MPABST always sets gain selected input microphone. MIC2B selected input recommended that disabled.
DUAL OPERATION
microphones connected dual differential configuration. This suitable stereo microphone noise cancellation applications. Mic1 connected between MIC2A MICCM inputs mic2 connected between MIC2B MICCM inputs shown Figure Additionally, another microphone supported MIC1 selected through input mux. Note that microphones connected single-ended configuration.
Figure Dual Microphone Configuration
MICROPHONE BIASING CIRCUIT
MICBIAS output provides noise reference voltage suitable biasing electret type microphones associated external resistor biasing network. Refer Applications Information section recommended external components. MICBIAS voltage altered MBVOL register 22h. When MBVOL=0, MICBIAS=0.9*AVDD when MBVOL=1, MICBIAS=0.75*AVDD.
January 2006
Preliminary Technical Data
WM9713L
microphone bias driven dedicated MICBIAS enabled MPOP1EN register 22h. also configured drive GPIO8 enabled MPOP2EN register 22h. When microphone bias powered down using Powerdown register MICBIAS (register 3Eh, 14). REGISTER ADDRESS LABEL MBOP2EN MBOP1EN MBVOL DEFAULT (Off) (On) DESCRIPTION Microphone bias enable GPIO8 (pin Microphone bias enable MICBIAS (pin Microphone bias voltage control AVDD 0.75 AVDD
Table Microphone Bias Voltage Control internal MICBIAS circuitry shown Figure Note that maximum source current capability MICBIAS 3mA. external biasing resistors therefore must large enough limit MICBIAS current 3mA.
Figure Microphone Bias Schematic
MICBIAS CURRENT DETECT
WM9713L includes microphone bias current detect circuit which allows user thresholds microphone bias current, above which interrupt will triggered. There separate interrupt bits, MICDET allow user e.g. distinguish between microphones connected WM9713L, MICSHT detect shorted microphone (mic button press). microphone current detect threshold MCDTHR[2:0], MICDET, MCDSCTHR[1:0] MICSHT. Thresholds each code shown Table When microphone bias current detect circuit powered down using Powerdown register (register 3Eh, 15). GPIO Interrupt Controller sections details interrupt status readback microphone bias current detect microphone short circuit detect.
January 2006
WM9713L
REGISTER ADDRESS LABEL MCDTHR DEFAULT
Preliminary Technical Data DESCRIPTION current detect threshold 000:100uA 001:200uA .100uA steps 111:800uA These values 3.3V supply scale with supply voltage (AVDD). current detect short circuit threshold 600uA 1200uA 1800uA 2400uA These values 3.3V supply scale with supply voltage (AVDD).
MCDSCTR
Table Microphone Current Detect Control
MICROPHONE PGAS
microphone pre-amps drive into microphone PGAs whose gain controlled register 0Eh. signals routed into headphone mixers mono mixer, speaker mixer prevent forming feedback loop) controlled register 10h. When signals selected input mixers outputs PGAs muted automatically. When microphone PGAs powered down using Powerdown register bits (register 3Eh, bits [3:2]). REGISTER ADDRESS Volume 12:8 LABEL MICAVOL DEFAULT 01000 (0dB) DESCRIPTION MICA input gain 00000: +12dB (1.5dB steps) 11111: -34.5dB MICB input gain 00000: +12dB (1.5dB steps) 11111: -34.5dB
MICBVOL
01000 (0dB)
Table Microphone Volume Control REGISTER ADDRESS Routing LABEL MA2M MB2M MIC2MBST MIC2H DEFAULT DESCRIPTION Mute MICA path mono mixer Mute, mute (ON) Mute MICB path mono mixer Mute, mute (ON) mono mixer boost 0dB, +20dB headphone mixers select Stereo (MICA HPL, MICB HPR) MICA only (MICA HPR) MICB only (MICB HPR) none (mutes microphone PGAs) headphone mixers gain 000: +6dB (3dB steps) 111: -15dB January 2006
MIC2HVOL
(0dB)
Table Microphone Routing Control
Preliminary Technical Data
WM9713L
MONOIN INPUT
(MONOIN) mono input designed connect receive path telephony device.The connects directly record selector phone call recording (Note: record both sides phone call, channel should record MONOIN signal while other channel records signal). record adjusts recording volume, controlled register function (see "Record Gain" "Automatic Level Control" sections). REGISTER ADDRESS Record Routing 15:14 LABEL DEFAULT (mute) DESCRIPTION Controls record headphone mixer paths. 00=stereo, 01=left only, 10=right only, 11=mute left right Controls gain record headphone mixer paths 000: +6dB (3dB steps) 111: -15dB Controls record mono mixer path. 00=stereo, 01=left only, 10=right only, 11=mute left right Enables 20dB gain boost record mono mixer path
13:11
R2HVOL
(0dB)
10:9
(mute)
R2MBST
(OFF)
Table Record Routing Control listen MONOIN signal, signal passes through separate PGA, controlled register 08h. signal routed into headphone mixer (for normal phone call operation) and/or speaker mixer (for speakerphone operation), into mono mixer prevent forming feedback loop). When signal selected input mixers output muted automatically. When MONOIN powered down using Powerdown register MOIN (register 3Eh, MONOIN biased internally reference voltage VREF. Whenever input muted device placed into standby mode, input remains biased VREF using special anti-thump circuitry suppress audible clicks when changing inputs. REGISTER ADDRESS MONOIN Routing 12:8 LABEL MONOIN DEFAULT 01000 (0dB) DESCRIPTION Mute MONIN path headphone mixer Mute, mute (ON) Mute MONOIN path speaker mixer Mute, mute (ON) MONOIN input gain 00000: +12dB (1.5dB steps) 11111: -34.5dB
Table Mono Control
PCBEEP INPUT
(PCBEEP) mono, line level input intended externally generated signal warning tones. routed directly record selector three output mixers, without input amplifier. signal gain into each mixer independently controlled, with separate mute each signal path.
January 2006
WM9713L
Preliminary Technical Data PCBEEP biased internally reference voltage VREF. When signal selected input mixers input remains biased VREF using special anti-thump circuitry suppress audible clicks when changing inputs. REGISTER ADDRESS PCBEEP input 14:12 LABEL B2HVOL DEFAULT (0dB) DESCRIPTION Mute PCBEEP path headphone mixer Mute, mute (ON) PCBEEP headphone mixer gain 000: +6dB (3dB steps) 111: -15dB Mute PCBEEP path speaker mixer Mute, mute (ON) PCBEEP speaker mixer gain 000: +6dB (3dB steps) 111: -15dB Mute PCBEEP path mono mixer Mute, mute (ON) PCBEEP mono mixer gain 000: +6dB (3dB steps) 111: -15dB
10:8
B2SVOL
(0dB)
B2MVOL
(0dB)
Table PCBEEP Control
DIFFERENTIAL MONO INPUT
PCBEEP MONOIN inputs configured provide differential mono input. This achieved mixing inputs together using headphone mixers speaker mixer. Note that gain MONOIN must match gain PCBEEP mixer input achieve balanced differential mono input.
January 2006
Preliminary Technical Data
WM9713L
AUDIO MIXERS
MIXER OVERVIEW
WM9713L four separate low-power audio mixers cover audio functions required smartphones, PDAs handheld computers. These mixers used drive audio outputs HPL, HPR, MONO, SPKL, SPKR, OUT3 OUT4. There also inverters used provide complementary output driver signals.
HEADPHONE MIXERS
There headphone mixers, headphone mixer left headphone mixer right (HPMIXL HPMIXR). These mixers stereo output driver source. They used drive stereo outputs HPR. They also used drive SPKL SPKR outputs and, when used conjunction with OUT3 OUT4, they configured drive complementary signals through output inverters support bridge-tied load (BTL) stereo loudspeaker outputs. following signals mixed into headphone path: MONOIN (controlled register 08h, "Audio Inputs") LINEL/R (controlled register 0Ah, "Audio Inputs") output Record (controlled register 14h, "Audio ADC", "Record Gain") stereo signal (controlled register 0Ch, "Audio DACs") signal (controlled register 10h, "Audio Inputs") PC_BEEP (controlled register 16h, "Audio Inputs") VXDAC signal (controlled register 18h, "Audio DACs") AUXDAC signal (controlled register 1Ah, "Auxiliary DAC")
typical smartphone application, headphone signal MONOIN VXDAC sidetone (for phone calls) stereo signal (for music playback). When headphone mixers powered down using Powerdown register bits HPLX HPRX (register 3Ch, bits [3:2]).
SPEAKER MIXER
speaker mixer (SPKMIX) mono source. typically used drive mono loudspeaker configuration. following signals mixed into speaker path: MONOIN (controlled register 08h, "Audio Inputs") LINEL/R (controlled register 0Ah, "Audio Inputs") stereo signal (controlled register 0Ch, "Audio DACs") PC_BEEP (controlled register 16h, "Audio Inputs") VXDAC signal (controlled register 18h, "Audio DACs") AUXDAC signal (controlled register 1Ah, "Auxiliary DAC")
typical smartphone application, speaker signal AUXDAC (for system alerts ring tone playback), MONOIN VXDAC (for speakerphone function), PC_BEEP (for externally generated ring tones). Note that when selected stereo input pairs LINEL/R DACL/R summed attenuated -6dB that 0dBFS signals each channel give stereo mixed 0dBFS output. When speaker mixer powered down using Powerdown register SPKX (register 3Ch,
January 2006
WM9713L
MONO MIXER
Preliminary Technical Data
mono mixer drives MONO pin. following signals mixed into MONO: LINEL/R (controlled register 0Ah, "Audio Inputs") output Record (controlled register 14h, "Audio ADC", "Record Gain") stereo signal (controlled register 0Ch, "Audio DACs") signal (controlled register 10h, "Audio Inputs") PC_BEEP (controlled register 16h, "Audio Inputs") VXDAC signal (controlled register 18h, "Audio DACs") AUXDAC signal (controlled register 12h, "Auxiliary DAC")
typical smartphone application, MONO signal amplified microphone signal (possibly with Automatic Gain Control) enabled) audio playback signal from stereo auxiliary DAC. Note that when selected stereo input pairs LINEL/R DACL/R summed attenuated -6dB that 0dBFS signals each channel give stereo mixed 0dBFS output. When mono mixer powered down using Powerdown register (register 3Ch,
MIXER OUTPUT INVERTERS
There general purpose mixer output inverters, INV1 INV2. Each inverter selected drive HPMIXL, HPMIXR, SPKMIX, MONOMIX HPMIXL HPMIXR outputs inverters used generate complimentary signals drive configured loads) provide greater flexibility output driver configurations. INV1 selected source SPKL, MONO OUT3 INV2 source SPKR OUT4. input source each inverter selected using INV1[2:0] INV2[2:0] register (see Table 31). When input selected inverter powered down. REGISTER ADDRESS 15:13 LABEL INV1 DEFAULT (OFF) DESCRIPTION INV1 source select 000: (OFF source selected) 001: MONOMIX 010: SPKMIX 011: HPMIXL 100: HPMIXR 101: HPMIXMONO 110: unused 111: Vmid INV2 source select Same INV1
12:10
INV2
(OFF)
Table Mixer Inverter Source Select
January 2006
Preliminary Technical Data
WM9713L
ANALOGUE AUDIO OUTPUTS
following sections give overview analogue audio output pins. WM9713L three outputs capable driving loads down (headphone line drivers) HPL, MONO four output capable driving loads down (loudspeaker line drivers) SPKL, SPKR, OUT3 OUT4. combination output drivers, mixers mixer inverters means that many output configurations supported. examples typical output mixer configurations please refer "Typical Output Configurations" section. more information recommended external components, please refer "Applications Information" section. Each output driven with gain range -46.5dB -1.5dB steps. Each input source mux, mute zero-cross detect circuit (delaying gain changes until zero-cross detected, after time-out).
HEADPHONE OUTPUTS
outputs (pins designed drive headphone load. They also used line outputs. They used coupled coupled (capless) configuration. available input sources HPMIXL/R Vmid (see Table 32). REGISTER ADDRESS Output Select LABEL DEFAULT (Vmid) DESCRIPTION input source select Vmid buffer disabled) HPMIXL unused input source select Vmid buffer disabled) HPMIXR unused
(Vmid)
Table Input Source signal volume independently adjusted under software control writing register 04h. When powered down using Powerdown register bits (register 3Eh, bits [10:9]). minimise pops clicks when powered down recommended that Vmid input selected during power down cycle. This ensures same level maintained output throughout.
January 2006
WM9713L
REGISTER ADDRESS Headphone Volume LABEL DEFAULT (Mute)
Preliminary Technical Data DESCRIPTION Mute Mute (OFF) Mute (ON) Left zero cross enable Change gain immediately Change gain only zero crossings, after time-out Volume 000000: (maximum) 000001: -1.5dB (1.5dB steps) 011111: -46.5dB 1xxxxx: -46.5dB Mute Mute (OFF) Mute (ON) Right zero cross enable Change gain immediately Change gain only zero crossings, after time-out Volume Similar HPLVOL
13:8
HPLVOL
000000 (0dB)
(Mute)
HPRVOL
000000 (0dB)
Table Control
MONO OUTPUT
MONO output (pin designed drive headphone load also used line outputs. available input sources MONOMIX, INV1 Vmid (see Table REGISTER ADDRESS Output Select 15:14 LABEL MONO DEFAULT (Vmid) DESCRIPTION MONO input source select Vmid buffer disabled) MONOMIX INV1
Table MONO Input Source signal volume MONO independently adjusted under software control writing register 08h. When MONO powered down using Powerdown register MONO (register 3Eh, 13). minimise pops clicks when powered down recommended that Vmid input selected during power down cycle. This ensures same level maintained output throughout.
January 2006
Preliminary Technical Data REGISTER ADDRESS MONO LABEL DEFAULT (Mute)
WM9713L
DESCRIPTION Mute MONO Mute (OFF) Mute (ON) Right zero cross enable Change gain immediately Change gain only zero crossings, after time-out MONO Volume 000000: (maximum) 000001: -1.5dB (1.5dB steps) 011111: -46.5dB 1xxxxx: -46.5dB
MONOVOL
000000 (0dB)
Table Mono Control
SPEAKER OUTPUTS SPKL SPKR
SPKL SPKR (pins designed drive loudspeaker load down also used line outputs headphone outputs. They designed drive load coupled (capless) configuration. available input sources HPMIXL/R, SPKMIXL/R, INV1/2 Vmid (see Table 36). REGISTER ADDRESS Output Select 13:11 LABEL SPKL DEFAULT (Vmid) DESCRIPTION SPKL input source select 000: Vmid 001: buffer disabled) 010: HPMIXL 011: SPKMIX 100: INV1 101-111: unused SPKR input source select 000: Vmid 001: buffer disabled) 010: HPMIXR 011: SPKMIX 100: INV2 101-111: unused
10:8
SPKR
(Vmid)
Table SPKL SPKR Input Source signal volume SPKL SPKR independently adjusted under software control writing register 02h. When SPKL SPKR powered down using Powerdown register bits SPKL SPKR (register 3Eh, bits [8:7]). minimise pops clicks when powered down recommended that Vmid input selected during power down cycle. This ensures same level maintained output throughout.
January 2006
WM9713L
REGISTER ADDRESS Speaker Volume LABEL DEFAULT (Mute)
Preliminary Technical Data DESCRIPTION Mute SPKL Mute (OFF) Mute (ON) Left zero cross enable Change gain immediately Change gain only zero crossings, after time-out SPKL Volume 000000: (maximum) 000001: -1.5dB (1.5dB steps) 011111: -46.5dB 1xxxxx: -46.5dB Mute SPKR Mute (OFF) Mute (ON) Right zero cross enable Change gain immediately Change gain only zero crossings, after time-out SPKR Volume Similar SPKLVOL
13:8
SPKLVOL
000000 (0dB)
(Mute)
SPKRVOL
000000 (0dB)
Table SPKL SPKR Control Note: speaker drive, recommended that both PGAs have same gain setting.
AUXILLARY OUTPUTS OUT3 OUT4
OUT3 OUT4 outputs (pins designed drive loudspeaker load down also used line outputs headphone outputs. They designed drive load coupled (capless) configuration used midrail buffer drive headphone outputs capless configuration. available input sources INV1/2 Vmid (see Table 38). REGISTER ADDRESS Output Select LABEL OUT3 DEFAULT (Vmid) DESCRIPTION OUT3 input source select Vmid buffer disabled) INV1 unused OUT4 input source select Vmid buffer disabled) INV2 unused
OUT4
(Vmid)
Table OUT3 OUT4 Input Source signal volume OUT3 OUT4 independently adjusted under software control writing register 06h. When OUT3 OUT4 powered down using Powerdown register bits OUT3 OUT4 (register 3Eh, bits [11:12]). minimise pops clicks when powered down recommended that Vmid input selected during power down cycle. This ensures same level maintained output throughout.
January 2006
Preliminary Technical Data REGISTER ADDRESS Speaker Volume LABEL DEFAULT (Mute)
WM9713L
DESCRIPTION Mute OUT4 Mute (OFF) Mute (ON) OUT4 zero cross enable Change gain immediately Change gain only zero crossings, after time-out OUT4 Volume 000000: (maximum) 000001: -1.5dB (1.5dB steps) 011111: -46.5dB 1xxxxx: -46.5dB Mute OUT3 Mute (OFF) Mute (ON) OUT3 zero cross enable Change gain immediately Change gain only zero crossings, after time-out OUT3 Volume Similar OUT4VOL
13:8
OUT4VOL
000000 (0dB)
(Mute)
OUT3VOL
000000 (0dB)
Table OUT3 OUT4 Control
THERMAL SENSOR
speaker headphone outputs drive very large currents. protect WM9713L from becoming hot, thermal sensor been built chip temperature reaches approximately 150°C, set, WM9713L deasserts GPIO register 54h, virtual GPIO that generate interrupt (see "GPIO Interrupt Control" section). REGISTER ADDRESS LABEL TSHUT DEFAULT DESCRIPTION Power down thermal sensor Enabled Disabled Thermal sensor (virtual GPIO) Temperature below 150°C Temperature above 150°C also "GPIO Interrupt Control" section.
Table Thermal Cutout Control
JACK INSERTION AUTO-SWITCHING
phone application, speaker connected across MONO HPL, stereo headphone stereo speakers SPKL, SPKR, OUT3 OUT4 (see Figure 15). Typically, only these three output devices used given time: when headphone plugged speaker stereo speakers active, otherwise headphone used.
January 2006
WM9713L
Preliminary Technical Data
Figure Typical Output Configuration presence headphone detected using GPIO1/6/7/8 (pins external pull-up resistor (see "Applications Information" section circuit diagram). When jack inserted GPIO pulled switch socket. When jack removed GPIO pulled high resistor. JIEN set, WM9713L automatically switches between headphone other output configuration, typically speaker stereo speaker that been Powerdown Output Select registers. Note: GPIO polarity inverted setting register 4Eh. addition typical configuration explained above WM9713L also support automatic switching between following three configurations speaker headphone. REGISTER ADDRESS Output Volume Mapping (Jack Insert) LABEL EARSPKSEL DEFAULT DESCRIPTION Default, speaker configuration selected. MONO driver selected speaker. OUT3 driver selected speaker. OUT4 driver selected speaker.
Table Speaker Configuration example OUT4 selected speaker, user should select EARSPKSEL then OUT4 tri-stated jack insert prevent sound across speaker during headphone operation volume OUT4 volume jack ensure correct speaker operation. should noted that other outputs except HPL, selected speaker driver disabled internally connected VREF jack insert. This maintains VREF those outputs helps prevent pops when outputs enabled. Finally user wishes couple headphone outputs user needs select between OUT3 OUT4 mid-rail output buffer driver. selected mid-rail output buffer enabled jack insert. jack defaults whatever configuration been Powerdown Output Select registers.
January 2006
Preliminary Technical Data
WM9713L
REGISTER ADDRESS Output Volume Mapping (Jack Insert)
LABEL DCDRVSEL
DEFAULT
DESCRIPTION Default, coupled headphone. OUT4 mid-rail output buffer. OUT3 mid-rail output buffer.
Table Coupled Headphone Configuration summary: JIEN set: Outputs work normal selected Powerdown Output Select registers. JIEN set: jack insert GPIO1/6/7/8 pulled low, enabled, DCDRVSEL decides headphones coupled configures OUT3 OUT4 suit, EARSPKSEL decides MONO, OUT3 OUT4 need tri-stated ensure sound ear-speaker finally other outputs disabled explained above prevent pops re-enabling. jack GPIO1/6/7/8 pulled high, outputs work normal selected Powerdown Output Select registers except that Volume controlled EARSPKSEL ensure correct speaker operation.
REGISTER ADDRESS Output Volume Mapping (Jack Insert) Additional Functions
LABEL JIEN
DEFAULT (OFF)
DESCRIPTION Jack Insert Enable Takes output GPIO1 logic
JSEL
(GPIO1)
GPIO select jack insert detection: GPIO1 GPIO6 GPIO7 GPIO8
Table Jack Insertion Auto-Switching
January 2006
WM9713L
Preliminary Technical Data
VOLUME
MONO STATE
VOLUME
MODE DESCRIPTION GPIO1
User Controlled
User Controlled
User Controlled
User Controlled
User Controlled
User Controlled
User Controlled
User Controlled User Controlled User Controlled
Jack Insert Detection Enabled. Headphone plugged Speaker Selected. Coupled Headphone Selected. Jack Insert Detection Enabled. Headphone plugged MONO Speaker Selected. Coupled Headphone Selected. Jack Insert Detection Enabled. Headphone plugged OUT3 Speaker Selected. Coupled Headphone Selected. Jack Insert Detection Enabled. Headphone plugged OUT4 Speaker Selected. Coupled Headphone Selected. Jack Insert Detection Enabled. Headphone plugged OUT4 Speaker Selected. OUT3 Coupled Headphone Selected. Jack Insert Detection Enabled. Headphone plugged out. Speaker Selected. Jack Insert Detection Enabled. Headphone plugged out. OUT4 Speaker Selected.
Volume
Volume
Enabled
Enabled
Volume
Volume
Tri-Stated
Enabled
Enabled
Volume
Volume
Tri-Stated
Enabled
Enabled
Volume
Volume
Tri-Stated
Enabled
Enabled
Volume
Volume
Tri-Stated
Enabled
Enabled
VMID
User Controlled
User Controlled
User Controlled
User Controlled
User Controlled
User Controlled
User Controlled
User Controlled
User Controlled
User Controlled
User Controlled
User Controlled
User Controlled
Table Jack Insertion Auto-Switching
January 2006
User Controlled
OUT4 Volume
User Controlled
User Controlled
Jack Insert Detection Disabled.
SPKR STATE
SPKL STATE
OUT3 STATE
OUT4 STATE
EARSPKSEL
STATE
STATE
DCDRVSEL
JIEN
Preliminary Technical Data
WM9713L
DIGITAL AUDIO (SPDIF) OUTPUT
WM9713L supports SPDIF standard. Pins used output SPDIF data. Note that pins also used GPIO pins. bits (register 56h, select between GPIO SPDIF functionality pins respectively (see "GPIO Interrupt control" section). Register read/write register that controls SPDIF functionality manages fields propagated channel status sub-frame case). With exception this register should only written when SPDIF transmitter disabled (SPDIF register `0'). Once desired values have been written this register, contents should read back ensure that sample rate particular supported, then SPDIF validity SPCV register should read ensure desired configuration valid. Only then should SPDIF enable register set. This ensures that control status information start correctly beginning SPDIF transmission. REGISTER ADDRESS Extended Audio LABEL SPCV SPSA DEFAULT DESCRIPTION SPDIF validity (read-only) SPDIF slot assignment (ADCO Slots Slots Slots Slots SPDIF output enable enabled, disabled Validity bit; indicates frame valid, indicates frame valid Indicates that WM9713L does support double rate SPDIF output (read-only) Indicates that WM9713L only supports 48kHz sampling SPDIF output (readonly) Generation level; programmed required user Category code; programmed required user Pre-emphasis; indicates pre-emphasis, indicates 50/15us pre-emphasis Copyright; indicates copyright asserted, indicates copyright Non-audio; indicates data PCM, indicates non-PCM format (e.g. DTS) Professional; indicates consumer, indicates professional Source SPDIF data SPDIF data comes from SDATAOUT (pin slot selected SPSA SPDIF data comes from audio
SPDIF Control Register 13:12
SPSR
10:4 Additional Function Control
COPY AUDIB ADCO
0000000
Table SPDIF Output Control
January 2006
WM9713L TOUCHPANEL INTERFACE
Preliminary Technical Data
WM9713L includes touchpanel driver digitiser circuit with 4-wire 5-wire resistive touchpanels. following functions implemented: co-ordinate measurement co-ordinate measurement down detection, with programmable sensitivity Touch pressure measurement (4-wire touchpanel only) Auxiliary measurement from COMP1/AUX1 (pin 29), COMP2/AUX2 (pin 30), WIPER/AUX4 (pin touchpanel digitiser uses very power, 12-bit successive approximation type ADC. same also used battery auxiliary measurements (see "Battery Alarm Battery Measurement" "Auxiliary Inputs" sections). on-chip switch matrix connects each touchpanel terminal supply voltage TPVDD, ground (TPGND), input, required.
Figure Touchpanel Switch Matrix
PRINCIPLE OPERATION FOUR-WIRE TOUCHPANEL
Four-wire touchpanels connected WM9713L follows: Right side contact (pin Left side contact (pin side contact (pin Bottom side contact (pin
principle operation illustrated below (Note: illustrations assume that plate used bottom plate measurements, although reverse also possible).
January 2006
Preliminary Technical Data
WM9713L
Figure Co-ordinate Measurement 4-wire Touchpanel co-ordinate measurement, internally switched TPVDD TPGND. plate becomes potential divider, voltage point contact proportional co-ordinate. This voltage measured pins, which carry current (hence there voltage drop RY-). ratiometric measurement method, supply voltage does affect measurement accuracy. voltage references VREF+ VREF- taken from after matrix switches, that voltage drop these switches effect measurement.
Figure Co-ordinate Measurement 4-wire Touchpanel co-ordinate measurements similar co-ordinate measurements, with plates interchanged.
Figure Down Detection 4-wire Touchpanel
January 2006
WM9713L
Preliminary Technical Data down detection uses zero power comparator (effectively CMOS logic gate) with internal, programmable pull-up resistor that controls pen-down sensitivity. Increasing makes touchpanel less sensitive touch, while lowering makes more sensitive. When touchpanel being touched, current flows circuit, PENDOWN signal low. When panel touched with finger, current flows through panel, comparator output goes high. PENDOWN signal read from register (labeled PNDN). also observed (GPIO3 PENDOWN), used GPIO (GE3=0). Additionally, PENDOWN passed GPIO logic block (register 54h, 13), where generate interrupts, wake WM9713L from sleep mode (see "GPIO Interrupt Control" section).
Figure Touch Pressure Measurement 4-wire Touchpanel Touch pressure determined indirectly measuring contact resistance between bottom plates. decreases touch pressure panel increases. WM9713L measures sending constant current through touchpanel measuring potential each plate. values subtracted digital domain obtain potential difference, which proportional suit different types touchpanels, magnitude either 400µA 200µA using control bit.
PRINCIPLE OPERATION FIVE-WIRE TOUCHPANEL
Five-wire touchpanels connected WM9713L follows: sheet contact WIPER/AUX4 (pin left corner bottom sheet (pin right corner bottom sheet (pin Bottom left corner bottom sheet (pin Bottom right corner bottom sheet (pin
January 2006
Preliminary Technical Data
WM9713L
Figure Co-ordinate Measurement 5-wire Touchpanel co-ordinate measurement, left bottom left corners touchpanel grounded internally WM9713L, while right bottom right contacts connected TPVDD. bottom plate becomes potential divider with voltage gradient direction. voltage point contact proportional co-ordinate. This voltage measured WIPER converted digital value ADC. ratiometric measurement method, supply voltage does affect measurement accuracy. voltage references VREF+ VREF- taken from after matrix switches, that voltage drop these switches effect measurement.
Figure Co-ordinate Measurement 5-wire Touchpanel co-ordinate measurements similar co-ordinate measurements. However, voltage gradient bottom plate direction instead direction. This achieved grounding bottom left bottom right corners touchpanel, connecting left right contacts TPVDD.
January 2006
WM9713L
Preliminary Technical Data
Figure Down Detection 5-wire Touchpanel down detection works similar fashion both 4-wire 5-wire touchpanels (see Four-Wire Touchpanel Operation). 5-wire touchpanel, four contacts bottom plate grounded, plate contact connected internal programmable pull-up resistor, RPU.
CONTROLLING TOUCHPANEL DIGITISER
touchpanel functions accessed controlled through AC-Link interface.
PHYSICAL CHARACTERISTICS
physical characteristics touchpanel interface controlled through register 78h, shown below. REGISTER ADDRESS LABEL DEFAULT (4-wire) DESCRIPTION Touchpanel Type Selection 4-wire 5-wire Current used pressure measurement 200µA 400µA Internal Pull-up resistor Detection 111111: 64k/63 1.02k (least sensitive) 111110: 64K/62 1.03K (pull-up binary value RPU) 000010: 64K/2 000001: 64k/1 (most sensitive) 000000: RESERVED this setting)
(200µA)
000001 (64k)
Table Touchpanel Digitiser Control (Physical Characteristics)
January 2006
Preliminary Technical Data
WM9713L
POWER MANAGEMENT
save power, touchpanel digitiser pen-down detector independently disabled when they used. power consumption pen-down detector normally negligible, except when down. powered-down using PADCPD, register state digitiser down detector controlled following bits. REGISTER ADDRESS 15:14 LABEL PADCPD DEFAULT DESCRIPTION power down ADC/AUX enable digitiser off, detect off, wake-up down (default) digitiser powered off, detect enabled, touchpanel digitiser wakes (changes state pen-down digitiser off, detect enabled, wake-up down digitiser detect enabled Wake-up pen-down mode Wake-up AC-Link only (hold SDATAIN high until controller sends warm reset cold reset) Wake-up WM9713L without waiting reset signal from controller
Table Touchpanel Digitiser Control (Power Management)
January 2006
WM9713L
INITIATION MEASUREMENTS
Preliminary Technical Data
WM9713L touchpanel interface supports both polling routines (direct memory access) control flow data from touchpanel host CPU. polling routine, starts each measurement individually writing POLL (register 74h, This automatically resets itself when measurement completed. REGISTER ADDRESS LABEL POLL DEFAULT DESCRIPTION Writing initiates measurement. (when set) Polling mode Continuous mode (for DMA) Continuous mode rate (DEL 1111) 93.75 (every AC-Link frames) (every AC-Link frames) 153.75 (every AC-Link frames) 187.5Hz (every AC-Link frames) Continuous mode "fast rate" (DEL 1111) (every AC-Link frames) (every four AC-Link frames) (every other AC-Link frame) (every AC-Link frame) measure regardless status measure only when down (when CTC=0 POLL=1, measurement delayed until pen-down; when CTC=1, measurements stopped pen-up) Sets polarity PENDOWN flag: non-inverted inverted
PDEN
PDPOL
Table Touchpanel Digitiser Control (Initiation Measurements) continuous mode (CTC WM9713L autonomously initiates measurements sets measurements) rate supplies measured data unused AC'97 time slots. DMA-enabled CPUs write data directly into FIFO without intervention core. This reduces loading speeds execution user programs handheld systems. Note that measurement frequency continuous mode also affected bits (see "Touchpanel Settling Time"). faster rates achieved when 1111 useful when used auxiliary measurements.
January 2006
Preliminary Technical Data
WM9713L
MEASUREMENT TYPES
ADCSEL control bits determine which type measurement performed (see below). REGISTER ADDRESS POLL LABEL DEFAULT DESCRIPTION Writing initiates measurement. (when set) ADCSEL_AUX4 ADCSEL_AUX3 ADCSEL_AUX2 ADCSEL_AUX1 ADCSEL_PRESSURE ADCSEL_Y ADCSEL_X Polling mode Continuous mode (for DMA) Enable COMP1/AUX4 measurement (pin32) Enable COMP1/AUX3 measurement (pin31) Enable COMP1/AUX2 measurement (pin30) Enable COMP1/AUX1 measurement (pin29) Enable touchpanel pressure measurement Enable touchpanel co-ord measurement Enable touchpanel co-ord measurement Enable co-ordinate mode Single measurement. single measurement made depending setting ADCSEL[7:1]. Co-ordinate measurement. then followed additional measurement indicated ADCSEL[7:1]. more than ADCSEL[7:1] selected then third, additional, measurement will alternate sequentially between those selected.
Table Touchpanel Digitiser Control (Measurement Types) When `0', WM9713L performs single measurement either polling mode continuously, indicated bit. type measurement specified ADCSEL[7:1] bits. CTC=0 (polling mode) then only ADCSEL[7:1] bits should set. operating continuous mode (CTC=1), then more than ADCSEL[7:1] selected conversions will performed cyclically following order co-ordinate mode (COO `1') makes easier obtain co-ordinate pairs rather than single coordinates. polling-coordinate mode (CTC `0', `1'), WM9713L performs coordinate, then co-ordinate, followed single additional measurement determined ADCSEL[7:1], then stops. continuous-coordinate mode (CTC `1', `1'), WM9713L continuously repeats sequence consisting X-co-ordinate,Y co-ordinate, then additional measurement determined ADCSEL[7:1] ADCSEL 000_0000, sequence XYXYXY. only). Should more than ADCSEL[7:1] bits during continuous co-ordinate mode then additional measurement alternates every three measurements. example ADCSEL_AUX1 ADCSEL_AUX3 were both selected whilst `1', then following sequence conversions would performed
January 2006
WM9713L
CONVERSION RATE
Preliminary Technical Data
stated previously conversion rate specified bits (reg 76h). 93.75Hz (every AC-Link Frames), 120Hz (every AC-Link Frames), 153.75Hz (every AC-Link frames) 187.5Hz (every AC-Link frames). only ADRSEL[7:1] then each individual conversion occurs rate specified multiple ADRSEL[7:1] bits then complete conversions requested completed rate specified
DATA READBACK
This data stored register 7Ah, retrieved reading register usual manner (see AC-Link Interface section). Additionally, data also passed controller AC-Link time slots used audio functions. output data word touchpanel interface consists three parts: Status bit) this also passed GPIO logic block, which programmed generate interrupt and/or wake WM9713L down (see GPIO Interrupt Control). Output data from touchpanel bits) ADCSRC: additional bits that indicate source data. co-ordinate mode (COO `1'), WM9713L schedules different types measurements autonomously these register bits required.
data being read back using polling method, there several ways determine when measurement finished: Reading back POLL bit. been reset `0', then measurement finished. Monitoring signal, GPIO interrupt section. goes high after every single conversion. operating co-ordinate mode (COO=1) then goes high after every group conversions. Reading back until data appears
January 2006
Preliminary Technical Data REGISTER ADDRESS AC-Link slot selected LABEL PNDN DEFAULT DESCRIPTION status (read-only) Down
WM9713L
14:12
ADCSRC
Touchpanel Source 000: measurement 001: co-ordinate measurement 010: co-ordinate measurement 011: Pressure measurement (4-wire only) 100: COMP1/AUX1 measurement (pin 101: COMP2/AUX2 measurement (pin 110: BMON/AUX3 measurement (pin 111: WIPER/AUX4 measurement (pin Touchpanel Data (read-only) effect (new data overwrites unread data register 7Ah) data held back, measurements delayed, until register read)
11:0
ADCD
000h
WAIT
Table Touchpanel Digitiser Data When operating co-ordinate mode (COO=1) there will results read back from each measurements namely third additional measurement. After co-ordinate finished result will present register 7Ah. Once this been read back user result will overwrite register 7Ah, indicated ADCSRC. Finally, after result been read back, result third, additional, measurement will become present 7Ah, again indicated ADCSRC. avoid losing data that been read, WM9713L delay overwriting register with conversions until data been read. This function enabled using WAIT bit, applies both single co-ordinate conversion mode. flow diagram Figure shows timing touchpanel conversions, data readback from register dependent individual settings POLL,ADCSEL bits.
January 2006
WM9713L
Preliminary Technical Data
POLL (74h) (74h) (74h) ADCSEL (74H)
Starts single measurement Starts co-ordinate measurement specified conversion rate Enables Co-Ordinate mode Specifies type measurement made
Figure Touchpanel Conversion Flow Diagram SLEN `1', then touchpanel data appears AC-Link slot selected control bits, shown below. Slot `tag' corresponding selected time slot asserted whenever there data that slot.
REGISTER ADDRESS
LABEL SLEN
DEFAULT
DESCRIPTION Slot Readback Enable Disabled (readback through register only) Enable (readback slot selected SLT) AC'97 Slot Selection Touchpanel Data 000: Slot 001: Slot 101: Slot 110: Slot 111: RESERVED
Table Returning Touchpanel Data Through AC-Link Time Slot
January 2006
Preliminary Technical Data
WM9713L
TOUCHPANEL SETTLING TIME
accurate touchpanel measurements, some settling time required between switch matrix applying voltage across touchpanel plate sampling signal. This time delay function built into WM9713L programmed shown below. REGISTER ADDRESS LABEL DEFAULT 0000 frame) DESCRIPTION Touchpanel Settling Time
Table Touchpanel Settling Time Control 0000 0001 0010 0011 0100 0101 0110 0111 1000 1001 1010 1011 1100 1101 1110 1111 DELAY (AC-LINK FRAMES) DELAY (TIME) 20.8µs 41.7µs 83.3µs 167µs 333µs 667µs 1.33ms 2.67ms 3.33ms 4.67ms 5.33ms
delay, switch matrix always
Table Touchpanel Settling Time Control total time co-ordinate auxiliary measurements complete delay time DEL, plus AC-Link frame (20.8µs). pressure measurement, time taken plus AC-Link frames (41.6µs). Although DELAY variable maximum value that programmed depends number ADCSEL[7:1] bits set, shown following table. Setting multiple ADCSEL[7:1] bits leaves less spare AC_Link frames DELAY.
January 2006
WM9713L
Preliminary Technical Data
NUMBERS ADCSEL[1:7] BITS 5,6,7 5,6,7 5,6,7 5,6,7 COO=1) COO=1) COO=1) COO=1) 2,3,4,5,6,7 COO=1) 2,3,4,5,6,7 COO=1) 2,3,4,5,6,7,8 COO=1) 2,3,4,5,6,7,8 COO=1)
SETTING
DELAY SETTING
(93.75Hz) (120Hz) (153.75Hz) (187.5Hz) (93.75Hz) (120Hz) (153.75Hz) (187.5Hz) (93.75Hz) (120Hz) (153.75Hz) (187.5Hz) (93.75Hz) (120Hz) (153.75Hz) (187.5Hz) (93.75Hz) (120Hz) (153.75Hz) (187.5Hz) (93.75Hz) (120Hz)
(153.75Hz) (187.5Hz)
Table Maximum Delay Values Setting `1111' reduces settling time zero, i.e. measurements begin immediately. This mode intended fast sampling inputs. intended touchpanel digitisation. There several side-effects when `1111': Co-ordinate mode does work, i.e. WM9713L behaves even (see "Measurement Types") co-ordinate touch pressure measurements selected (ADCSEL 001, 011), then switch matrix constantly current constantly flows touchpanel. This increases power consumption system, therefore recommended battery powered systems continuous mode (CTC setting 1111 increases sampling rate touchpanel (see "Initiation Measurements")
January 2006
Preliminary Technical Data
WM9713L
MASK INPUT CONTROL
Sources glitch noise, such signals driving display, feed through touchscreen plates affect measurement accuracy. order minimise this effect, signal applied MASK (pin delay synchronise sampling input ADC. effect MASK signal depends bits register (bits [7:6]), described below. REGISTER ADDRESS LABEL DEFAULT DESCRIPTION MASK input control (see Table
Table MASK Input Control MSK[1-0] EFFECT SIGNAL MASK Mask effect conversions GPIO input disabled (default) Static; `hi' MASK stops conversions, `lo' effect. Edge triggered; rising falling edge MASK delays conversions amount DEL[3-0] register. Conversions asynchronous MASK signal. Synchronous mode; conversions wait until rising falling edge MASK initiates cycle; screen starts driven when edge arrives, conversion sample being taken period DEL[3-0] after edge.
Table Controlling MASK Feature Note that also used GPIO(see "GPIO Interrupt Control" section), output signal (see below).
SIGNAL
Whenever data becomes available from touchpanel ADC, internal (ADC Data Available) signal goes high remains high until data been read from register SLEN until been sent AC-Link slot SLEN goes high After every touchpannel conversion normal mode, COO=0) After every conversions (co-ordinate mode, COO=1)
used generate interrupt, (register 52h, (see "GPIO interrupt control" section) also possible output signal this used GPIO. GE4/6 must achieve this (see "GPIO interrupt control" section). Alternatively, read from register 54h.
January 2006
WM9713L ADDITIONAL FEATURES
AUXILIARY INPUTS
Preliminary Technical Data
used touchpanel digitisation also used sole purpose auxiliary measurements, provided that enabled (register 78h, 11). WM9713L three pins that used auxiliary inputs: MIC2A COMP1 AUX1 (pin MIC2B COMP2 AUX2 (pin WIPER AUX4 (pin
Additionally, speaker supply (SPKVDD) used auxillary input through onchip potential divider giving input auxillary SPKVDD/3. This input referred AUX3 input (see Figure 16). Note that connects wiper 5-wire touchpanel wiper function. Auxiliary measurements taken only meaningful when connected touchpanel (i.e. 4-wire touchpanel, touchpanel all, used). Pins also used comparator inputs (see Battery Alarm Battery Measurement), auxiliary measurements still taken these pins time. ADCSEL control bits select between different inputs, shown Table ADCSEL control bits determine which type measurement performed (see below). When performing auxiliary conversions co-ordinate mode bit, COO, should (0). CTC=0 then only ADCSEL[7:1] bits should set. operating continuous mode (CTC=1), then more than ADCSEL[7:1] set, conversions will performed cyclically following order "AUX1,AUX2,AUX3,AUX4." dependent which bits set. REGISTER ADDRESS ADCSEL_AUX4 ADCSEL_AUX3 ADCSEL_AUX2 ADCSEL_AUX1 Enable AUX4 measurement (pin12) Enable AUX3 measurement (SPKVDD) Enable AUX2 measurement (pin30) Enable AUX1 measurement (pin29) Enable co-ordinate mode touchpanel conversions only (see "Controlling Touchpanel Interface") LABEL DEFAULT
Table Auxiliary Measurements Auxiliary measurements initiated same touchpanel measurements, data returned same manner. Please refer "Controlling Touchpanel Interface" section.
January 2006
Preliminary Technical Data
WM9713L
BATTERY ALARM ANALOGUE COMPARATORS
battery alarm function differs from battery measurement that does actually measure battery voltage. Battery alarm only indicates "OK", "Low" "Dead". advantage battery alarm function that does require clock therefore used low-power sleep standby modes.
Figure Battery Alarm Example Schematic typical schematic dual threshold battery alarm shown above. This alarm thresholds, "dead battery" (COMP1) "low battery" (COMP2). threshold voltages. Their values about order keep battery current [IALARM VBATT (R1+R2+R3)] minimum (higher resistor values affect accuracy system leakage currents into input pins become significant). Dead battery alarm: COMP1 triggers when VBATT VREF (R1+R2+R3) (R2+R3) dead battery alarm highest priority interrupt system. should immediately save unsaved data shut down system. GP15, GS15 GW15 bits must generate this interrupt. battery alarm: COMP2 triggers when VBATT VREF (R1+R2+R3) battery alarm lower priority than dead battery alarm. Since threshold voltage higher than dead battery alarm, there enough power left battery give user warning and/or shut down "gracefully". When VBATT gets close battery threshold, spurious alarms filtered COMP2 delay function. purpose capacitor remove from comparator inputs high frequency noise glitches that present battery (for example, noise generated charge pump). forms pass filter with pass cutoff [Hz] (R2+R3))) Provided that cutoff frequency several orders magnitude lower than noise frequency this simple circuit achieve excellent noise rejection. Noise rejection [dB] circuit shown above also allows measuring battery voltage VBATT. This achieved simply setting touchpanel input either COMP1 (ADCSEL 100) COMP2 (ADCSEL 101) (see also Auxiliary Inputs).
January 2006
WM9713L
Preliminary Technical Data WM9713L on-chip comparators that used implement battery alarm function, other functions such window comparator. Each comparator inputs tied three device pins other tied voltage reference. voltage reference either internally generated (VREF AVDD/2) externally connected AUX4 (pin 12). comparator output signals passed GPIO logic block (see "GPIO Interrupt Control" section), where they used send interrupt AC-Link pin, wake WM9713Lfrom sleep mode. COMP1/AUX1 (pin corresponds GPIO COMP2/AUX2 (pin30) REGISTER ADDRESS LABEL DEFAULT DESCRIPTION COMP1 Polarity (see also "GPIO Interrupt Control") Alarm when COMP1 voltage below VREF Alarm when COMP1 voltage above VREF COMP1 Polarity (see also "GPIO Interrupt Control") Alarm when COMP2 voltage below VREF Alarm when COMP2 voltage above VREF Battery Alarm Delay 000: delay 001: 0.17s (213 8192 AC-Link frames) 010: 0.34s (214 16384 AC-Link frames) 011: 0.68s (215 32768 AC-Link frames) 100: 1.4s (216 65536 AC-Link frames) 101: 2.7s 131072 AC-Link frames) 110: 5.5s (218 262144 AC-Link frames) 111: 10.9s (219 524288 AC-Link frames)
15:13
COMP2
Table Comparator Control REGISTER ADDRESS Additional Analogue Functions LABEL C1REF DEFAULT DESCRIPTION Comparator Reference Voltage 13:12 C1SRC C2REF 10:9 C2SRC Table Comparator Reference Source Control VREF AVDD/2 WIPER/AUX4 (pin AVDD/2 when C1REF='1'. Otherwise comparator powered down COMP1/AUX1 (pin COMP2/AUX2 (pin AUX3 (SPKVDD) VREF AVDD/2 WIPER/AUX4 (pin AVDD/2 when C2REF='1'. Otherwise comparator powered down COMP1/AUX1 (pin COMP2/AUX2 (pin AUX3 (SPKVDD)
Comparator Signal Source
Comparator Reference Voltage
Comparator Signal Source
January 2006
Preliminary Technical Data
WM9713L
COMP2 DELAY FUNCTION
COMP2 optional delay function when input signal noisy. When COMP2 triggers delay enabled (i.e. COMP2DEL non-zero), then GPIO does change state immediately, interrupt generated. Instead, WM9713L starts delay timer checks COMP2 again after delay time passed. COMP2 still active, then GPIO interrupt generated (depending state GW14 bit). COMP2 longer active, GPIO set, i.e. register bits COMP2 never triggered.
COMP2 TRIGGERS
C2W?
COMP2 DEL?
non-zero
START TIMER
WAIT time=COMP2DEL SHUT DOWN TIMER
COMP2?
Inactive
[FALSE ALARM]
Active
GI14
Figure COMP2 Delay Flow Chart
January 2006
WM9713L
GPIO INTERRUPT CONTROL
Preliminary Technical Data
WM9713L eight GPIO pins that operate defined AC'97 Revision specification. Each GPIO input output, corresponding bits register slot state GPIO output determined sending data through slot outgoing frames (SDATAOUT). Data returned from GPIO input reading register bit, examining slot incoming frames (SDATAIN). GPIO inputs made sticky, programmed generate interrupt, transmitted either through AC-Link through dedicated, level-mode interrupt (GPIO2/IRQ, 45). addition, GPIO pins used interface setting register (see "PCM Codec" section). Setting this disables GPIO functions selected these pins. REGISTER ADDRESS Codec Control GPIO Sharing LABEL CTRL DEFAULT DESCRIPTION Enables interface GPIO pins Normal GPIO functions interface enabled Toggle GPIO function: secondary function enabled GPIO enabled
(GPIO)
Table GPIO Additional Function Control GPIO pins multi-purpose pins that also used other (non-GPIO -PCM) purposes, e.g. SPDIF output signal pendown. This controlled register 56h. Note that GPIO6/7/8 each have additional function independent GPIO auxillary functions discussed above. these pins used GPIO then independent function needs disabled using control registers, e.g. GPIO then RESETB function needs disabled (RSTDIS, register 5Ah, Independently GPIO pins, WM9713L also seven virtual GPIOs. These signals from inside WM9713L, which treated they were GPIO input signals. From software perspective, virtual GPIOs same GPIO pins, they cannot outputs, tied actual pin. This allows simple, uniform processing different types signals that generate interrupts (e.g. down, battery warnings, jack insertion, high-temperature warning, GPIO signals).
January 2006
Preliminary Technical Data
WM9713L
Figure GPIO Logic GPIO SLOT TYPE GPIO GPIO GPIO GPIO GPIO GPIO GPIO GPIO Virtual GPIO Virtual GPIO Virtual GPIO Virtual GPIO Virtual GPIO Virtual GPIO Virtual GPIO [MICDET] [MICSHT] [Thermal Cutout] [ADA] [PEN DOWN] [COMP2] [COMP1] GPIO1 GPIO2 enabled only when used GPIO3 PENDOWN enabled only when used PENDOWN GPIO4 MASK enabled only when used GPIO5 SPDIF_OUT enabled only when used SPDIF_OUT GPIO6 MASK Enabled only when used GPIO7 PENDOWN enabled only when used PENDOWN GPIO8 SPDIF_OUT enabled only when used SPDIF_OUT Internal microphone bias current detect, generates interrupt above threshold (see MICBIAS Current Detect) Internal shorted microphone detect, generates interrupt above threshold (see MICBIAS Current Detect) Internal thermal cutout signal, indicates when internal temperature reaches approximately 150°C (see "Thermal Sensor") Internal (ADC Data Available) Signal enabled only when touchpanel active Internal PENDOWN Signal enabled only when pen-down detection active Internal COMP2 output (Low Battery Alarm) enabled only when COMP2 Internal COMP1 output (Dead Battery Alarm) enabled only when COMP1
Table GPIO Bits Pins
January 2006
WM9
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