Document Outline
- WM9713L
- AC 97 Audio +Touchpanel CODEC
- DESCRIPTION
- FEATURES
- APPLICATIONS
- BLOCK DIAGRAM
- TABLE OF CONTENTS
- PIN CONFIGURATION
- ORDERING INFORMATION
- PIN DESCRIPTION
- ABSOLUTE MAXIMUM RATINGS
- RECOMMENDED OPERATING CONDITIONS
- ELECTRICAL CHARACTERISTICS
- AUDIO OUTPUTS
- AUDIO INPUTS
- AUXILIARY MONO DAC (AUXDAC)
- PCM VOICE DAC (VXDAC)
- TOUCHPANEL AND AUXILIARY ADC
- COMPARATORS
- REFERENCE VOLTAGES
- DIGITAL INTERFACE CHARACTERISTICS
- HEADPHONE / SPEAKER OUTPUT THD VERSUS POWER THD+ N ( B)
- POWER CONSUMPTION
- DEVICE DESCRIPTION
- INTRODUCTION
- AUDIO PATHS OVERVIEW
- CLOCK GENERATION
- CLOCK DIVISION MODES
- PLL MODE
- DATA AND CONTROL INTERFACE
- AC97 INTERFACE
- PCM INTERFACE
- AUDIO ADCS
- STEREO ADC
- RECORD SELECTOR
- RECORD GAIN
- AUTOMATIC LEVEL CONTROL
- AUDIO DACS
- STEREO DAC
- VOICE DAC
- AUXILIARY DAC
- VARIABLE RATE AUDIO /SAMPLE RATE CONVERSION
- AUDIO INPUTS
- LINE INPUT
- MICROPHONE INPUT
- MONOIN INPUT
- PCBEEP INPUT
- DIFFERENTIAL MONO INPUT
- AUDIO MIXERS
- MIXER OVERVIEW
- HEADPHONE MIXERS
- SPEAKER MIXER
- MONO MIXER
- MIXER OUTPUT INVERTERS
- ANALOGUE AUDIO OUTPUTS
- HEADPHONE OUTPUTS HPL AND HPR
- MONO OUTPUT
- SPEAKER OUTPUTS SPKL AND SPKR
- AUXILLARY OUTPUTS OUT3 AND OUT4
- THERMAL SENSOR
- JACK INSERTION AND AUTO-SWITCHING
- DIGITAL AUDIO (SPDIF)OUTPUT
- TOUCHPANEL INTERFACE
- PRINCIPLE OF OPERATION -FOUR-WIRE TOUCHPANEL
- PRINCIPLE OF OPERATION -FIVE-WIRE TOUCHPANEL
- CONTROLLING THE TOUCHPANEL DIGITISER
- ADDITIONAL FEATURES
- AUXILIARY ADC INPUTS
- BATTERY ALARM AND ANALOGUE COMPARATORS
- GPIO AND INTERRUPT CONTROL
- ADDITIONAL POWER MANAGEMENT
- POWER ON RESET (POR)
- AC97 INTERFACE TIMING
- REGISTER MAP
- APPLICATIONS INFORMATION
- RECOMMENDED EXTERNAL COMPONENTS
- LINE OUTPUT
- AC-COUPLED HEADPHONE OUTPUT
- DC COUPLED (CAPLESS)HEADPHONE OUTPUT
- BTL LOUDSPEAKER OUTPUT
- COMBINED HEADSET /BTL EAR SPEAKER
- COMBINED HEADSET /SINGLE-ENDED EAR SPEAKER
- JACK INSERT DETECTION
- HOOKSWITCH DETECTION
- TYPICAL OUTPUT CONFIGURATIONS
- PACKAGE DIMENSIONS
- IMPORTANT NOTICE
- ADDRESS:
1
WM9713L
AC'97 Audio + Touchpanel CODEC
WOLFSON MICROELECTRONICS plc
www.wolfsonmicro.com
Preliminary Technical Data, March 2004, Rev 2.2
Copyright
2004 Wolfson Microelectronics plc
DESCRIPTION
The WM9713L is a highly integrated input/output device
designed for mobile computing and communications.
The chip is architected for dual CODEC operation,
supporting Hi-Fi stereo Codec functions via the AC link
interface, and additionally supporting voice Codec functions
via a PCM type Synchronous Serial Port (SSP). A third Aux
DAC is provided which may be used to support generation
of supervisory tones, or ring-tones etc. at different sample
rates to the main codec.
The device can connect directly to a 4-wire or 5-wire touch-
panel, mono or stereo microphones, stereo headphones
and a stereo speaker, reducing total component count in the
system. Cap-less connections to the headphones,
speakers, and earpiece may be used, saving cost and
board area. Additionally, multiple analog input and output
pins are provided for seamless integration with analog
connected wireless communication devices.
All device functions are accessed and controlled through a
single AC-Link interface compliant with the AC'97 standard.
The 24.576 MHz masterclock can be input directly or
generated internally from a 13MHz (or other frequency)
clock by an onboard PLL. The PLL supports a wide range
of input clock from 2.048Mhz to 78.6Mhz.
The WM9713L operates at supply voltages from 1.8 to 3.6
Volts. Each section of the chip can be powered down under
software control to save power. The device is available in a
small leadless 7x7mm QFN package, ideal for use in hand-
held portable systems.
FEATURES
AC'97 Rev 2.2 compatible stereo codec
- DAC SNR 94dB, THD 85dB
- ADC SNR 87dB, THD 86dB
- Variable Rate Audio, supports all WinCE sample rates
- Tone Control, Bass Boost and 3D Enhancement
On-chip 45mW headphone driver
On-chip 400mW mono or stereo speaker drivers
Stereo, mono or differential microphone input
- Automatic Level Control (ALC)
- Mic insert and mic button press detection
Auxiliary mono DAC (ring tone or DC level generation)
Seamless interface to wireless chipset
Resistive touchpanel interface
- Supports 4-wire and 5-wire panels
- 12-bit resolution, INL
2 LSBs (<0.5 pixels)
- X, Y and touch-pressure (Z) measurement
- Pen-down detection supported in Sleep Mode
Additional PCM/I
2
S interface to support voice CODEC
PLL derived audio clocks.
Supports input clock ranging from 2.048Mhz to 78.6Mhz
1.8V to 3.6V supplies (digital down to 1.62V, speaker up to
4.2V)
7x7mm 48-pin QFN package
APPLICATIONS
Personal Digital Assistants (PDA) with or without phone
Smartphones
Handheld and Tablet Computers
BLOCK DIAGRAM
WM9713L
Preliminary Technical Data
1
PTD, March 2004, Rev 2.2
2
TABLE OF CONTENTS
DESCRIPTION .......................................................................................................1
FEATURES.............................................................................................................1
APPLICATIONS .....................................................................................................1
BLOCK DIAGRAM .................................................................................................1
TABLE OF CONTENTS .........................................................................................2
PIN CONFIGURATION...........................................................................................4
ORDERING INFORMATION ..................................................................................4
PIN DESCRIPTION ................................................................................................5
ABSOLUTE MAXIMUM RATINGS .........................................................................7
RECOMMENDED OPERATING CONDITIONS .....................................................7
ELECTRICAL CHARACTERISTICS ......................................................................8
AUDIO OUTPUTS.......................................................................................................... 8
AUDIO INPUTS.............................................................................................................. 9
AUXILIARY MONO DAC (AUXDAC).............................................................................. 9
PCM VOICE DAC (VXDAC) ........................................................................................... 9
TOUCHPANEL AND AUXILIARY ADC ........................................................................ 10
COMPARATORS ......................................................................................................... 10
REFERENCE VOLTAGES ........................................................................................... 10
DIGITAL INTERFACE CHARACTERISTICS................................................................ 11
HEADPHONE / SPEAKER OUTPUT THD VERSUS POWER ..................................... 12
POWER CONSUMPTION ....................................................................................13
DEVICE DESCRIPTION .......................................................................................14
INTRODUCTION.......................................................................................................... 14
AUDIO PATHS OVERVIEW......................................................................................... 16
CLOCK GENERATION ................................................................................................ 17
CLOCK DIVISION MODES .......................................................................................... 17
PLL MODE ................................................................................................................... 20
DATA AND CONTROL INTERFACE............................................................................ 22
AC97 INTERFACE ....................................................................................................... 22
PCM INTERFACE ........................................................................................................ 23
AUDIO ADCS .......................................................................................................28
STEREO ADC.............................................................................................................. 28
RECORD SELECTOR ................................................................................................. 29
RECORD GAIN............................................................................................................ 30
AUTOMATIC LEVEL CONTROL.................................................................................. 31
AUDIO DACS .......................................................................................................35
STEREO DAC.............................................................................................................. 35
VOICE DAC ................................................................................................................. 37
AUXILIARY DAC.......................................................................................................... 38
VARIABLE RATE AUDIO / SAMPLE RATE CONVERSION ...............................40
AUDIO INPUTS ....................................................................................................41
LINE INPUT ................................................................................................................. 41
MICROPHONE INPUT................................................................................................. 41
MONOIN INPUT........................................................................................................... 46
PCBEEP INPUT ........................................................................................................... 46
DIFFERENTIAL MONO INPUT .................................................................................... 47
Preliminary Technical Data
WM9713L
1
PTD, March 2004, Rev 2.2
3
AUDIO MIXERS....................................................................................................48
MIXER OVERVIEW ..................................................................................................... 48
HEADPHONE MIXERS ................................................................................................ 48
SPEAKER MIXER ........................................................................................................ 48
MONO MIXER.............................................................................................................. 49
MIXER OUTPUT INVERTERS..................................................................................... 49
ANALOGUE AUDIO OUTPUTS ...........................................................................50
HEADPHONE OUTPUTS HPL AND HPR................................................................. 50
MONO OUTPUT .......................................................................................................... 51
SPEAKER OUTPUTS SPKL AND SPKR .................................................................. 52
AUXILLARY OUTPUTS OUT3 AND OUT4 ............................................................... 53
THERMAL SENSOR .................................................................................................... 54
JACK INSERTION AND AUTO-SWITCHING............................................................... 54
DIGITAL AUDIO (SPDIF) OUTPUT......................................................................58
TOUCHPANEL INTERFACE................................................................................59
PRINCIPLE OF OPERATION - FIVE-WIRE TOUCHPANEL........................................ 61
CONTROLLING THE TOUCHPANEL DIGITISER ....................................................... 63
ADDITIONAL FEATURES....................................................................................73
AUXILIARY ADC INPUTS............................................................................................ 73
BATTERY ALARM AND ANALOGUE COMPARATORS.............................................. 74
GPIO AND INTERRUPT CONTROL............................................................................ 77
POWER MANAGEMENT .....................................................................................82
INTRODUCTION.......................................................................................................... 82
AC97 CONTROL REGISTER....................................................................................... 82
EXTENDED POWERDOWN REGISTERS .................................................................. 82
ADDITIONAL POWER MANAGEMENT....................................................................... 83
POWER ON RESET (POR) ......................................................................................... 84
AC97 INTERFACE TIMING.......................................................................................... 84
REGISTER MAP...................................................................................................89
REGISTER BITS BY ADDRESS .................................................................................. 90
APPLICATIONS INFORMATION .......................................................................103
RECOMMENDED EXTERNAL COMPONENTS......................................................... 103
LINE OUTPUT ........................................................................................................... 103
AC-COUPLED HEADPHONE OUTPUT..................................................................... 104
DC COUPLED (CAPLESS) HEADPHONE OUTPUT ................................................. 104
BTL LOUDSPEAKER OUTPUT ................................................................................. 105
COMBINED HEADSET / BTL EAR SPEAKER........................................................... 105
COMBINED HEADSET / SINGLE-ENDED EAR SPEAKER....................................... 106
JACK INSERT DETECTION ...................................................................................... 106
HOOKSWITCH DETECTION..................................................................................... 106
TYPICAL OUTPUT CONFIGURATIONS ................................................................... 107
PACKAGE DIMENSIONS ..................................................................................111
IMPORTANT NOTICE ........................................................................................112
ADDRESS:................................................................................................................. 112
WM9713L
Preliminary Technical Data
1
PTD, March 2004, Rev 2.2
4
PIN CONFIGURATION
ORDERING INFORMATION
DEVICE
TEMPERATURE
RANGE
PACKAGE
MOISTURE SENSITIVITY
LEVEL
PEAK SOLDERING
TEMPERATURE
WM9713LGEFL/V
-25 to +85
o
C
48-pin QFN
(lead free)
MSL3
260
o
C
WM9713LGEFL/RV
-25 to +85
o
C
48-pin QFN
(lead free, tape and reel)
MSL3
260
o
C
Note:
Reel quantity = 2,200
Preliminary Technical Data
WM9713L
1
PTD, March 2004, Rev 2.2
5
PIN DESCRIPTION
PIN
NAME
TYPE
DESCRIPTION
1
DBVDD
Supply
Digital I/O Buffer Supply
2
MCLKA
Digital Input
Master Clock A Input
3
MCLKB / GPIO6 / (ADA / MASK)
Digital In/Out
Master Clock B Input / GPIO6 / (ADA output / MASK input)
4
DGND1
Supply
Digital Ground (return path for both DCVDD and DBVDD)
5
SDATAOUT
Digital Input
Serial Data Output from Controller / Input to WM9713L
6
BITCLK
Digital Output
Serial Interface Clock Output to Controller
7
DGND2
Supply
Digital Ground (return path for both DCVDD and DBVDD)
8
SDATAIN
Digital Output
Serial Data Input to Controller / Output from WM9713L
9
DCVDD
Supply
Digital Core Supply
10
SYNC
Digital Input
Serial Interface Synchronisation Pulse from Controller
11
RESETB / GPIO7 / (PENDOWN)
Digital In / Out
Reset (asynchronous, active Low, resets all registers to their
default) / GPIO7 / (pen down output)
12
WIPER / AUX4 / GPIO8 / (SPDIF) Analogue In / Out
Top Sheet Connection for 5-wire Touchpanels / Auxiliary ADC
input / GPIO8 / (SPDIF digital audio output)
13
TPVDD
Supply
Touchpanel Driver Supply
14
X+/ BR
Analogue Input
Touchpanel Connection: X+ (Right) for 4-wire / bottom right for 5-
wire
15
Y+/TR
Analogue Input
Touchpanel Connection: Y+ (Top) for 4-wire / top right for 5-wire
16
X-/TL
Analogue Input
Touchpanel Connection: X- (Left) for 4-wire / top left for 5-wire
17
Y-/BL
Analogue Input
Touchpanel Connection: Y- (Bottom) for 4-wire / bottom left for 5-
wire
18
TPGND
Supply
Touchpanel Driver Ground
19
PCBEEP
Analogue Input
Line Input to analogue audio mixers, typically used for beeps
20
MONOIN
Analogue Input
Mono Input (RX)
21
MIC1
Analogue Input
Microphone preamp A input 1
22
MICCM
Analogue Input
Microphone common mode input
23
LINEL
Analogue Input
Left Line Input
24
LINER
Analogue Input
Right Line Input
25
AVDD
Supply
Analogue Supply (audio DACs, ADCs, PGAs, mic amps, mixers)
26
AGND
Supply
Analogue Ground
27
VREF
Analogue Output
Internal Reference Voltage (buffered CAP2)
28
MICBIAS
Analogue Output
Bias Voltage for Microphones (buffered CAP2
1.8)
29
MIC2A / COMP1 / AUX1
Analogue Input
Microphone preamp A input 2 / COMP1 input / Auxillary ADC input
30
MIC2B / COMP2 / AUX2
Analogue Input
Microphone preamp B input / COMP2 input / Auxillary ADC input
31
MONO
Analog output
Mono output driver (line or headphone)
32
CAP2
Analogue In / Out
Internal Reference Voltage (normally AVDD/2, if not overdriven)
33
OUT4
Analogue Output
Auxillary output driver (speaker, line or headphone)
34
SPKGND
Supply
Speaker ground (feeds output buffers on pins 33, 35, 36 and 37)
35
SPKL
Analogue Output
Left speaker driver (speaker, line or headphone)
36
SPKR
Analogue Output
Right speaker driver (speaker, line or headphone)
37
OUT3
Analogue Output
Auxillary output driver (speaker, line or headphone)
38
SPKVDD
Supply
Speaker supply (feeds output buffers on pins 33, 35, 36 and 37)
39
HPL
Analogue Output
Headphone left driver (line or headphone)
40
HPGND
Supply
Headphone ground (feeds output buffers on pins 39 and 41)
41
HPR
Analogue Output
Headphone right driver (line or headphone)
42
AGND2
Supply
Analogue ground, chip substrate
43
HPVDD
Supply
Headphone supply (feeds output buffers on pins 39 and 41)
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