STMICROELECTRONICS STW4820

34.807IRELESS
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STw4820
Mixed-signal multimedia and power management IC
Data Brief
Features
■
Power management for platform
– 3 programmable step-down converters
– 6 programmable LDOs
■
Audio
– Dual high-quality stereo codecs
– DAC: dynamic range and SNR > 100 dB
– Two TDM 4-channel interfaces
(configurable in I2S and PCM)
– AB class headset capless stereo amplifier
– D class loudspeaker stereo amplifier
(2 x 1 W)
■
USB 2.O OTG interface
– High-speed (480 Mb/s) OTG transceiver
– ULPI interface
– VBUS peripheral supply up to 100 mA
■
TVout
– CVBS output
– PAL, NTSC TV standards supported
■
■
■
VFBGA 8 mm x 8 mm x 1.0 mm, 0.4mm pitch
Applications
– Nomadik™ STn88xx multimedia processor
– Smartphones, portable media player
Description
STw4820 is a highly integrated mixed signal
multimedia and power management IC that
enables complete integration of all analog
functions needed in high-end mobile phones or
portable multimedia applications.
General-purpose analog digital converter
– 4- and 5-wire touch screen interface
– Main and back-up battery monitoring
– Accessory detection
With its highly efficient set of regulators, STw4820
optimizes overall power consumption of
multimedia processor and its peripherals.
Clock management
– 32 kHz oscillator with RTC
– System clock oscillator
(38.4 MHz, 26 MHz, 19.2 MHz supported)
The high fidelity and versatile embedded audio
codec offers best-in-class audio quality and
extensive uses cases.
Miscellaneous
– ON/OFF key driver
– Temperature shutdown
– Lead-free and halogen-free package
February 2008
The high-speed USB transceiver makes PC
synchronization faster than ever. Integrated OTG
supply enables data transfer towards other
peripherals.
Rev 1
For further information contact your local STMicroelectronics sales office.
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www.st.com
6
Overview
STw4820
1
Overview
1.1
Power management for platform
●
●
1.2
1.3
2/6
3 very low load/line transient step-down converters
–
for core DSP, I/Os, peripherals, external memories, DDR, SRAM
–
programmable from 0.8 up to 1.8 V
–
800 mA current capability
–
12.5 mV step for digital voltage frequency scaling
6 LDOs
–
for PLLs, processor permanent core, high-speed interface and peripherals
–
1.2 V to 3.3 V with current capability up to 200 mA.
Audio
●
Dual stereo codec
●
DAC: dynamic range and SNR > 100 dB
●
Multiple mixing capabilities and use case support
●
Two TDM 4-channel interfaces (configurable in I2S and PCM)
●
Switchable differential stereo inputs, line or microphone
●
Two digital microphone inputs able to manage 4 digital microphones
●
Differential microphone stereo inputs
●
AB class headset capless stereo amplifier
●
AB class earpiece differential amplifier
●
D class loudspeaker stereo amplifier (2 x 1 W)
●
D class vibrator differential amplifier
USB 2.O OTG interface
●
High-speed (480 Mb/s), full-speed (12 Mb/s) and low-speed (1.5 Mb/s) OTG
transceiver
●
UART mode
●
ULPI interface
●
VBUS charge pump can supply an external USB device (100 mA).
STw4820
1.4
1.5
Overview
TVout
●
27 MHz PLL
●
YCbCr 4:2:2 8-bit input format
●
CVBS output
●
TV standards supported
1.7
PAL B, D, G, H, I, N, Nc, M
–
NTSC M, J, 4.43
●
Macrovision 7.1.L.1
●
TV/VCR plug insertion detection
General-purpose analog digital converter
●
1.6
–
Touch screen interface
–
supports 4 and 5-wire resistive touch screen
–
supports joystick (exclusive with touch screen)
●
Main battery monitoring
●
Backup battery monitoring
●
Two auxiliary inputs
●
Two accessory detection inputs
Clock management
●
32 kHz oscillator with RTC
●
System clock oscillator (38.4, 26, 19.2 MHz supported)
●
System clock and 32 kHz clock distribution
Miscellaneous
●
ON/OFF key driver
●
Temperature shutdown
●
SPI interface for control
●
Dedicated I2C bus for Vcore1 dynamic voltage control
●
Backup battery control and charge
3/6
Block diagram
2
Block diagram
Figure 1.
STw4820 functional block diagram
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STw4820
STw4820
3
Ordering information
Ordering information
Table 1.
Order codes
Order codes
Package
Packing
STW4820U4/HF(1)
VFBGA 8 mm x 8 mm x 1 mm, 0.4 mm pitch
Tray
STW4820U4T/HF
VFBGA 8 mm x 8 mm x 1 mm, 0.4 mm pitch
Tape and reel
1. ECOPACK® package.
4
Revision history
Table 2.
Document revision history
Date
Revision
07-Feb-2008
1
Changes
Initial release.
5/6
STw4820
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