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WM9705_06 Datasheet

  • WM9705_06

  • Multimedia AC’97 CODEC with Integrated Touch Screen Control...

  • 462.67KB

  • 55頁

  • WOLFSON

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Multimedia AC鈥?7 CODEC with
Integrated Touch Screen Controller
DESCRIPTION
The WM9705 is a high-quality stereo audio codec with an
integrated touch screen controller.
The audio section is compliant with the Intel AC鈥?7 Rev 2.2
specification. It performs full-duplex 18-bit codec functions and
supports variable sample rates from 8 to 48k samples/s with
high signal to noise ratio. Optional AC鈥?7 features include 3D
sound enhancement, line-level outputs, stereo buffered
headphone outputs, hardware sample rate conversion,
primary/secondary mode operation and S/PDIF output.
Headphone auto-detect, I
2
S output and headphone buffer on the
mono output are included.
Additionally, the WM9705 integrates a complete 4-wire touch
screen controller, including on-chip screen drivers, pen-down
detection feature, and pressure measurement capability.
A 5-pin digital bi-directional AC-Link serial interface allows
transfer of control data and DAC and ADC words to and from
the AC鈥?7 controller. The WM9705 is fully operable on 3V or 5V
or mixed 3/5V supplies, and is packaged in the industry
standard 48-pin TQFP package with 7mm body size, or in a
smaller 7
脳
7
脳
0.9mm QFN.
WM9705
FEATURES
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
AC鈥?7 rev2.2 compliant codec with pen digitiser
18-bit stereo audio codecs
On-chip sample rate conversion
Multiple channel input mixer
S/PDIF digital audio output
Headphone drivers on AUX and MONO outputs
4-wire touch screen interface with co-ordinate and
pressure measurement, and pen-down detection
Wake-up from sleep mode on pen down
3V to 5V operation
Extensive power management features including hardware
power down option
Standard AC鈥?7 pinout in 48-lead TQFP package or
48-lead QFN package.
APPLICATIONS
鈥?/div>
鈥?/div>
Personal Digital Assistants and 鈥楽martphones鈥?/div>
PocketPC systems
BLOCK DIAGRAM
DGND1
DVDD1
DGND2
DVDD2
CX3D1 CX3D2
HPGND
HPVDD
LINEINVOL (Reg 10h)
CDVOL (Reg 12h)
MICVOL (Reg 0Eh)
MUX
ADCNDAC
(Reg 5Ch)
HPVOL
(Reg 04h)
M
U
X
16 / 32Ohm
headphone
HPOUTL
HPOUTR
HPGND
3D
MPM
(Reg 5Ah)
VID
MIXVOL
(Reg 72h)
AUX
HPND
(Reg 5Ch)
LINEINL
LINEINR
CDL
CDGND
CDR
MIC2
MIC1
PHONE
M
U
X
RECORD
GAIN
(Reg 1Ch)
ADC
L
DIGITAL
FILTERS
危鈭?/div>
MODULATION
DAC
L
MIC BOOST
MIC SELECT
(Reg 0Eh)
(Reg 20h) M
0/20
U
dB
X
M
U
X headset autodetect
HPOUTL
PHONE
VID
AUX
RECORD
SELECT
(Reg 1Ah)
ADC
R
VARIABLE
RATE AUDIO
DAC
R
DACVOL
(Reg 18h)
LINEOUTL
LINEOUTR
POP
(Reg 20h)
MASTER VOL
(Reg 02h)
MIX
(Reg 20h)
W
PCBEEP
ADCSEL
(Reg 0Ah)
(Reg 0Ch)
M
U
X
AUXADC
BMON
SAR
ADC
WM9705
PSEL
(Reg 5Ch)
M
U
X
MONO VOL
(Reg 06h)
MONO_OUT
(TX)
PEN DOWN
TOUCH PANEL
SWITCH MATRIX
CONTROL LOGIC
VID
AUX
AC'97
INTERFACE
VREF
VREFOUT
CLOCK
OSC
X+/AUXL
X-/AUXR
XTLOUT
Y+/VIDL
Y-/VIDR
XTLIN
PDRES
AVDD1
AGND1
PENDET
EAPD/BUSY
MASK/LRC
SPEN/I2S
SPDIF
CID
BITCLK
SYNC
SDATAIN
SDATAOUT
RESETB
PCBEEP
PHONE
(RX)
24.576MHz
4-wire resistive
touchpanel
WOLFSON MICROELECTRONICS plc
To receive regular email updates, sign up
at
http://www.wolfsonmicro.com/enews/
Production Data, August 2006, Rev 4.4
Copyright
漏2006
Wolfson Microelectronics plc
AGND2
VREF
AVDD2
CAP2

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