ST 的 CD 伺服控制器能提供 CD 播放机所有前端功能的单芯片解决方案，包括马达控制和处理激光头信号来产生模拟和数字信号。
针对汽车娱乐应用，STA1052 CD伺服控制器有以下的特点：
■播放功能
■音频解码
■内嵌 ARM7DMI 微控制器
■模拟前端
■数字伺服
■防震控制器
■数字接口
■立体声 DAC 端口

STA1052
Description
The STA1052 is a single chip device which performs all functions related to read back of optical disk: servo control operations, reading optical disc decoding the High frequency signals, EFM decoding, error correction, software decoding of MP3 and WMA encoded audio, sample rate conversion, managing file system, serial transfer of audio/program through I2S/SPDIF, direct playback of audio through in-built audio DAC.
It also performs software decoding of MP3, AAC and WMA encoded audio from USB or SD card? memory supports.
Commands can be exchanged with the Host MCU either via one I2C port or two SPI ports.
STA1052 chip comes along a broad software suite that comprehends different types of compressed audio files, File System Management, Play Lists.
The key Media and File Types supported are briefly reported below:
- Ability to play any USB/SD card compatible solid state memory media
- MPEG1-Layer 2 compressed audio files
- Playback of MP3 compressed audio files (all bit rates and VBR)
- Playback of lower bit rate MPEG2 layer 3 files and MPEG-2.5 extension
- Playback of WMA version 9 compressed audio files
- Playback of iTunes AAC compressed audio files
- Sample rate converter for recorded sampling rates other than 44.1kHz
- Support FAT16/FAT32 file systems
- Support ISO9660 and Joliet file systems
The software can manage the following File Information: folder and file names.
ID3 tag information - as per versions 1.0-1.1, 2.0 - 2.4 - is reported. Further parameters made available by ST software are: File type (i.e. .mp3, .wav, .wma, .cda, .aac), Bit rate, entire file path for current track and track elapsed time.
STA1052 software provides the essential Navigation Commands: Previous/Next , Fast forward/Rewind, Jump to any file, Scan, Pause. All these commands can be programmed and configured via Command Protocol Interface.
Two different types of Playlists are supported: Playlists with .pls extension, Playlists with .m3u extension.
Robust software architecture provides an efficient error handling and related messaging.
ST developed a software architecture that allows the patching of a few parts of software resident in ROM. Software patches are loaded into a very inexpensive serial Flash which provides the capability to patch up to 40 KByte of ROM software.
Software build (patching) upgrade from media USB and SD card and from host MCU onto serial Flash is supported.
STA1052 is intended for use in automotive entertainment system.

Key Features
CD-R, CD-RW playback
Audio decoding (MP3,WMA,AAC)
CLV (1x, 2x, 4x) and CAV mode (6x)
On-chip USB-OTG host full speed
3.3 V ±5 % operating supply range for I/O
1.8 V ±5 % operating supply range for logic
IDLE, WFI and STOP modes
Power on reset / Brownout controller
33.8688 MHz external quartz/resonator
Operating temperature range: -40 °C to +85 °C
Embedded ARM7TDMI microcontroller
32 bit MCU with 3-stage pipeline @ 67 MHz
384 KB internal ROM (4 Mb on package RAM for development version) and 128 KB RAM
I2C master/slave (400 kHz) + 1 CRQ line
Two high-speed UART full-duplex
Two buffered SPI master/slave interface
Analog Front-end part
A, B, C, D, E, F voltage inputs
Automatic gain and offset control
ALPC circuit with integrated Power MOS
8 bit 2 channels general purpose ADC
Digital servo
Automatic fine gain/balance/offset adjustment for tracking and focus
Embedded 16 bit servo DSP (33.8688 MHz)
PDM controls for focus, tracking, spindle, sledge
Embedded stepping sledge motor controller
CLV & CAV spindle control
Acquisition
Full range adjustment-free digital PLL
EFM demodulation and synchronization
Q subcode and CD text decoder
Error correction
CIRC, capable of dual C1, quad C2 erasure
RSPC capable of C3 corrections
Jitter absorbing capacity ±24 frames (CLV)
Shock-proof controller
Up to 64 Mbit external SDRAM interface
8/16 bit data bus interface
ADPCM (4:1) lossy compression for extended shock proof capability
Audio features
Two I2S transmitters and one I2S receiver
SPDIF transmitter (IEC958) and receiver
Sample-rate conversion from 8 kHz - 48 kHz input to 44.1 kHz output
Digital equalizer for bass/treble control
Built-in stereo DAC
Development environment
5 pin JTAG port (IEEE 1149.1 standard)