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 General-purpose analog digital converter 4- and 5-wire touch screen interface Main and back-up battery monitoring Accessory detection Clock management 32 kHz oscillator with RTC System clock oscillator (38.4 MHz, 26 MHz, 19.2 MHz supported) Miscellaneous ON/OFF key driver Temperature shutdown Lead-free and halogen-free package
VFBGA 8 mm x 8 mm x 1.0 mm, 0.4mm pitch
Appl ication s
NomadikTM STn88xx multimedia processor Smar tphones, 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. With its highly efficient set of regulators, STw4820 optimizes overall power consumption of multimedia processor and its peripherals. The high fidelity and versatile embedded audio codec offers best-in-class audio quality and extensive uses cases. The high-speed USB transceiver makes PC synchronization faster than ever. Integrated OTG supply enables data transfer towards other peripherals.
February 2008
Rev 1
1/6
www.st.com
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For further information contact your local STMicroelectronics sales office.
Overview
STw4820
1
1.1
Overview
Power management for platform
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 for PLLs, processor permanent core, high-speed interface and peripherals 1.2 V to 3.3 V with current capability up to 200 mA.
6 LDOs
1.2
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
1.3
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).
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STw4820
Overview
1.4
TVout
27 MHz PLL YCbCr 4:2:2 8-bit input format CVBS output TV standards supported PAL B, D, G, H, I, N, Nc, M NTSC M, J, 4.43
Macrovision 7.1.L.1 TV/VCR plug insertion detection
1.5
General-purpose analog digital converter
Touch screen interface suppor ts 4 and 5-wire resistive touch screen suppor ts joystick (exclusive with touch screen)
Main battery monitoring Backup battery monitoring Two auxiliary inputs Two accessory detection inputs
1.6
Clock management
32 kHz oscillator with RTC System clock oscillator (38.4, 26, 19.2 MHz supported) System clock and 32 kHz clock distribution
1.7
Miscellaneous
ON/OFF key driver Temperature shutdown SPI interface for control Dedicated I2C bus for Vcore1 dynamic voltage control Backup battery control and charge
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Block diagram
STw4820
2
Figure 1.
Block diagram
STw4820 functional block diagram
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STw4820
Ordering information
3
Ordering information
Table 1. Order codes
Package VFBGA 8 mm x 8 mm x 1 mm, 0.4 mm pitch VFBGA 8 mm x 8 mm x 1 mm, 0.4 mm pitch Tray Tape and reel Packing
Order codes STW4820U4/HF(1) STW4820U4T/HF
1. ECOPACK package.
4
Revision history
Table 2.
Date 07-Feb-2008
Document revision history
Revision 1 Initial release. Changes
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STw4820
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