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WM9712L PDF даташит

Спецификация WM9712L изготовлена ​​​​«Wolfson Microelectronics plc» и имеет функцию, называемую «AC97 Audio and Touchpanel CODEC».

Детали детали

Номер произв WM9712L
Описание AC97 Audio and Touchpanel CODEC
Производители Wolfson Microelectronics plc
логотип Wolfson Microelectronics plc логотип 

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WM9712L Даташит, Описание, Даташиты
WM9712L
AC’97 Audio and Touchpanel CODEC
DESCRIPTION
The WM9712L is a highly integrated input / output device
designed for mobile computing and communications. The
device can connect directly to a 4-wire or 5-wire touchpanel,
mono or stereo microphones, stereo headphones and a
mono speaker, reducing total component count in the
system. Additionally, phone input and output pins are
provided for seamless integration with wireless
communication devices.
The WM9712L also offers up to four auxiliary ADC inputs
for analogue measurements such as temperature or light,
and five GPIO pins for interfacing to buttons or other digital
devices. To monitor the battery voltage in portable systems,
the WM9712L has two uncommitted comparator inputs.
All device functions are accessed and controlled through a
single AC-Link interface compliant with the AC’97 standard.
Additionally, the WM9712L can generate interrupts to
indicate pen down, pen up, availability of touchpanel data,
low battery, dead battery, and GPIO conditions.
The WM9712L 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, or in the industry standard 48-pin
TQFP package.
BLOCK DIAGRAM
FEATURES
AC’97 Rev 2.2 compatible stereo codec
- DAC SNR 94dB, THD –87dB
- ADC SNR 92dB, THD –87dB
- Variable Rate Audio, supports all WinCE sample rates
- Tone Control, Bass Boost and 3D Enhancement
On-chip 45mW headphone driver
On-chip 400mW mono speaker driver
Stereo, mono or differential microphone input
- Automatic Level Control (ALC)
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
Up to 5 GPIO pins
2 comparator inputs for battery monitoring
Up to 4 auxiliary ADC inputs
1.8V to 3.6V supplies
7x7mm QFN or 48-pin TQFP package options
APPLICATIONS
Personal Digital Assistants (PDA)
Smartphones
Handheld and Tablet Computers
WOLFSON MICROELECTRONICS plc
www.wolfsonmicro.com
Production Data, December 2003, Rev 4.0
Copyright 2003 Wolfson Microelectronics plc.









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WM9712L Даташит, Описание, Даташиты
WM9712L
TABLE OF CONTENTS
Production Data
DESCRIPTION .......................................................................................................1
FEATURES.............................................................................................................1
APPLICATIONS .....................................................................................................1
BLOCK DIAGRAM .................................................................................................1
TABLE OF CONTENTS .........................................................................................2
PIN CONFIGURATION...........................................................................................4
ORDERING INFORMATION ..................................................................................4
PIN DESCRIPTION ................................................................................................5
ABSOLUTE MAXIMUM RATINGS.........................................................................6
RECOMMENDED OPERATING CONDITIONS .....................................................6
ELECTRICAL CHARACTERISTICS ......................................................................7
AUDIO OUTPUTS.......................................................................................................... 7
AUDIO INPUTS.............................................................................................................. 8
AUXILIARY MONO DAC (AUXDAC).............................................................................. 8
TOUCHPANEL AND AUXILIARY ADC .......................................................................... 9
COMPARATORS ........................................................................................................... 9
REFERENCE VOLTAGES ........................................................................................... 10
DIGITAL INTERFACE CHARACTERISTICS................................................................ 10
HEADPHONE / SPEAKER OUTPUT THD VERSUS POWER ..................................... 11
POWER CONSUMPTION............................................................................................ 12
DEVICE DESCRIPTION.......................................................................................13
INTRODUCTION.......................................................................................................... 13
AUDIO PATHS OVERVIEW......................................................................................... 14
AUDIO INPUTS ....................................................................................................15
LINE INPUT ................................................................................................................. 15
MICROPHONE INPUT................................................................................................. 15
PHONE INPUT............................................................................................................. 17
PCBEEP INPUT ........................................................................................................... 18
AUDIO ADC..........................................................................................................19
RECORD SELECTOR ................................................................................................. 20
RECORD GAIN............................................................................................................ 21
AUTOMATIC LEVEL CONTROL.................................................................................. 22
AUDIO DACS .......................................................................................................25
STEREO DAC.............................................................................................................. 25
AUXILIARY DAC.......................................................................................................... 28
ANALOGUE AUDIO OUTPUTS ...........................................................................29
HEADPHONE OUTPUTS – HPOUTL AND HPOUTR.................................................. 29
EAR SPEAKER OUTPUT – OUT3............................................................................... 30
LOUDSPEAKER OUTPUTS – LOUT2 AND ROUT2.................................................... 31
PHONE OUTPUT (MONOOUT)................................................................................... 32
THERMAL SENSOR .................................................................................................... 32
JACK INSERTION AND AUTO-SWITCHING............................................................... 33
DIGITAL AUDIO (SPDIF) OUTPUT ............................................................................. 34
AUDIO MIXERS ........................................................................................................... 35
w
PD Rev 4.0 December 2003
2









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WM9712L Даташит, Описание, Даташиты
Production Data
WM9712L
VARIABLE RATE AUDIO / SAMPLE RATE CONVERSION ...............................37
TOUCHPANEL INTERFACE................................................................................38
PRINCIPLE OF OPERATION - FOUR-WIRE TOUCHPANEL ..................................... 38
PRINCIPLE OF OPERATION - FIVE-WIRE TOUCHPANEL........................................ 40
CONTROLLING THE TOUCHPANEL DIGITISER ....................................................... 42
AUXILIARY ADC INPUTS ....................................................................................47
BATTERY MEASUREMENT USING THE BMON/AUX3 PIN ....................................... 47
BATTERY ALARM AND ANALOGUE COMPARATORS ....................................48
GPIO AND INTERRUPT CONTROL ....................................................................51
AC97 DATA AND CONTROL INTERFACE .........................................................58
INTERFACE PROTOCOL............................................................................................ 58
INTERFACE TIMING ................................................................................................... 59
REGISTER MAP...................................................................................................62
REGISTER BITS BY ADDRESS .................................................................................. 63
APPLICATIONS INFORMATION .........................................................................71
RECOMMENDED EXTERNAL COMPONENTS........................................................... 71
LINE OUTPUT ............................................................................................................. 72
AC-COUPLED HEADPHONE OUTPUT....................................................................... 73
DC COUPLED (CAPLESS) HEADPHONE OUTPUT ................................................... 73
BTL LOUDSPEAKER OUTPUT ................................................................................... 74
COMBINED HEADSET / BTL EAR SPEAKER............................................................. 74
COMBINED HEADSET / SINGLE-ENDED EAR SPEAKER......................................... 74
JACK INSERT DETECTION ........................................................................................ 75
HOOKSWITCH DETECTION....................................................................................... 75
PACKAGE DRAWING - QFN ...............................................................................76
PACKAGE DRAWING – TQFP ............................................................................77
IMPORTANT NOTICE ..........................................................................................78
ADDRESS:................................................................................................................... 78
w
PD Rev 4.0 December 2003
3










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Номер в каталогеОписаниеПроизводители
WM9712LAC97 Audio and Touchpanel CODECWolfson Microelectronics plc
Wolfson Microelectronics plc

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