MPEG AUDIO CODEC The VS1011E is a single-chip MP3/WMA/MIDI audio decoder and ADPCM encoder manufactured by VLSI Solution. Below are its key specifications, descriptions, and features:
### **Specifications:**
1. **Audio Decoding Formats:**
- MP3 (MPEG-1 & MPEG-2 Audio Layer III)
- WMA (Windows Media Audio)
- MIDI (General MIDI/SP-MIDI)
2. **Audio Encoding Format:**
- IMA ADPCM (4-bit)
3. **Sampling Rates:**
- MP3: 8–48 kHz
- WMA: 8–48 kHz
- ADPCM: 8–48 kHz
4. **Bit Rates Supported:**
- MP3: 8–320 kbps
- WMA: 5–384 kbps
5. **DAC Performance:**
- 16-bit resolution
- 90 dB SNR (Signal-to-Noise Ratio)
- 0.5% THD+N (Total Harmonic Distortion + Noise)
6. **Operating Voltage:**
- 2.5V (core)
- 2.5V–3.6V (I/O)
7. **Power Consumption:**
- ~50 mW (typical during playback)
8. **Interface:**
- Serial control interface (SPI)
- Serial data interface (SDI)
9. **Package:**
- 48-pin LQFP
10. **On-Chip Memory:**
- 1.5 KB instruction RAM
- 0.5 KB data RAM
### **Descriptions:**
- The VS1011E is a low-power, high-quality audio codec chip designed for embedded applications.
- It integrates a DSP processor, stereo DAC, and headphone amplifier in a single chip.
- Supports real-time encoding of audio into IMA ADPCM format.
- Includes an on-chip PLL for flexible clock generation.
### **Features:**
- **Built-in Headphone Driver:** Capable of driving 30 mW into 16Ω headphones.
- **Bass and Treble Controls:** Software-configurable.
- **On-Chip PLL:** Allows operation with a wide range of input clock frequencies.
- **Low Power Modes:** Includes standby and power-down modes for energy efficiency.
- **User-Programmable DSP:** Supports custom audio processing applications.
- **Integrated Voltage Regulator:** Simplifies power supply design.
The VS1011E is commonly used in portable audio players, voice recorders, and other embedded audio applications.
