Overview
The STA013 is a fully integrated MPEG 2.5 Layer III audio decoder produced by STMicroelectronics. This IC is designed to decode Layer III compressed elementary streams as specified in MPEG 1 and MPEG 2 standards, as well as lower sampling frequencies extended to MPEG 2.5. The STA013 supports various sampling frequencies, including 48, 44.1, 32, 24, 22.05, 16, 12, 11.025, and 8 kHz, and accepts data rates from 8 Kbit/s to 320 Kbit/s. It features a serial input interface for the compressed bitstream and a serial PCM output interface that can be directly connected to a Digital-Analogue Converter (DAC).
Key Specifications
| Parameter | Description | Value |
|---|---|---|
| Package Types | SO28, TQFP44, LFBGA64 | - |
| Power Supply Voltage | VDD | 2.4 to 3.6V |
| Operating Temperature | Tamb | 0 to 70°C |
| Input Clock Frequencies | External clock or crystal oscillator | 10 MHz, 14.31818 MHz, 14.7456 MHz |
| Data Interface | Serial Input Interface (SPI compatible) | Up to 20 MHz |
| Control Interface | I2C bus | Up to 400 kHz |
| Output Interface | Serial PCM Output (I2S and other formats) | - |
| Power Consumption | - | 85mW at 2.4V |
| Additional Features | Digital Volume Control, Digital Bass & Treble Control, CRC Check and Synchronization Error Detection | - |
Key Features
- Flexible Decoding: Supports all features specified for Layer III in ISO/IEC 11172-3 (MPEG 1 Audio) and ISO/IEC 13818-3.2 (MPEG 2 Audio), including MPEG 2.5 extensions.
- Multiple Sampling Frequencies: Supports sampling frequencies of 48, 44.1, 32, 24, 22.05, 16, 12, 11.025, and 8 kHz.
- Serial Interfaces: Uses SPI-compatible serial input interface and I2C control bus.
- Direct DAC Connection: The decoded signal can be sent directly to a DAC via the PCM output interface.
- Internal MP3 Parser: Skips non-MP3 data such as ID3 tags, allowing direct feeding of MP3 files without preprocessing.
- Clock Generation: Includes a Phase-Locked Loop (PLL) for internal clock and output PCM clock generation.
- Low Power Consumption: Operates at 85mW at 2.4V.
- Digital Volume and Tone Control: Features digital volume, bass, and treble control.
- Error Detection: Includes CRC check and synchronization error detection with software indicators.
Applications
- PC Sound Cards: Ideal for integrating into PC sound cards for MP3 playback.
- Multimedia Players: Suitable for use in various multimedia players and audio devices.
- Embedded Systems: Can be used in embedded systems requiring MP3 decoding capabilities.
- Audio Equipment: Applicable in a wide range of audio equipment such as car audio systems, portable audio players, and home audio devices.
Q & A
- What is the STA013 and what does it do?
The STA013 is a fully integrated MPEG 2.5 Layer III audio decoder that decodes compressed MP3 audio streams and outputs digital PCM data.
- What are the supported sampling frequencies of the STA013?
The STA013 supports sampling frequencies of 48, 44.1, 32, 24, 22.05, 16, 12, 11.025, and 8 kHz.
- What interfaces does the STA013 use for data and control?
The STA013 uses a SPI-compatible serial input interface for data and an I2C bus for control commands.
- Can the STA013 output be connected directly to a DAC?
Yes, the decoded signal from the STA013 can be sent directly to a DAC via the PCM output interface.
- Does the STA013 require any preprocessing of MP3 files?
No, the STA013 has an internal MP3 parser that skips non-MP3 data such as ID3 tags, allowing direct feeding of MP3 files.
- What is the power consumption of the STA013?
The STA013 operates at a power consumption of 85mW at 2.4V.
- Does the STA013 support digital volume and tone control?
Yes, the STA013 features digital volume, bass, and treble control.
- How does the STA013 handle clock generation?
The STA013 includes a Phase-Locked Loop (PLL) for internal clock and output PCM clock generation.
- What are some common applications of the STA013?
The STA013 is commonly used in PC sound cards, multimedia players, embedded systems, and various audio equipment.
- What is the significance of the configuration file for the STA013?
The configuration file is necessary for the STA013 to operate, as it contains over 2000 assignments of values to registers that must be uploaded before the chip can function.
