The VS1011 is VLSI Solution's basic MP3 decoder chip. It has a reliable and high-quality MP3 and WAV decoding engine combined with a stereo D/A converter and earphone amplifier. Although intended as slave processor, the VS1011 also has a standalone mode that can be used to create a simple standalone MP3 player. Available in two difference packages, this IC is truly customer-proven: over ten million units have been delivered!

1. Decodes MP3 (MPEG 1.0 & 2.0 audio layer III (CBR, VBR, ABR));
2. MP1 & MP2 (MPEG 1.0 & 2.0 audio layers I & II) optional;
3. WAV (PCM + IMA ADPCM)
4. Full 320 kbit/s MP3 with 12.0 MHz external clock
5. Streaming support for MP1/2/3 and WAV
6. Bass and treble controls
7. Operates with single 12 - 13 MHz or 24 - 26 MHz external clock
8. Internal clock doubler
9. Low-power operation
10. High-quality stereo DAC with no phase error between channels
11. Stereo earphone driver capable of driving a 30­ ohm load
12. Separate 2.5...3.6 V operating voltages for analog and digital
13. Serial control and data interfaces
14. Can be used as a slave co-processor
15. 5.5 KiB On-chip RAM for user code / data
16. SPI flash boot for special applications
17. New functions may be added with software and 4 GPIO pins