VS1003 - MP3 / WMA / MIDI Audio Codec Circuit

VS1003 is a versatile slave MP3 and WMA decoder chip, replacing the discontinued VS1002. It can record wideband speech quality audio and play MIDI either from files or using a standard serial MIDI keyboard with the Real-Time MIDI Input Application. Many wide-ranging applications have been developed for this IC that has sold more than 5 million units.

• Decodes MP3 (MPEG 1 & 2 audio layer III) (CBR +VBR +ABR);
  WMA 4.0/4.1/7/8/9 all profiles (5-384kbit/s);
  WAV (PCM + IMA ADPCM);
  General MIDI / SP-MIDI files
• Encodes IMA ADPCM from microphone or line input
• Streaming support
• Bass and treble controls
• Operates with a single 12 - 13 MHz clock
• Internal PLL clock multiplier
• Low-power operation
• High-quality on-chip stereo DAC with no phase error between channels
• Stereo earphone driver capable of driving a 30­ ohm load
• Separate operating voltages for analog, digital and I/O
• 5.5 KiB On-chip RAM for user code / data
• Serial control and data interfaces
• Can be used as a slave co-processor
• SPI flash boot for special applications
• UART for debugging purposes
• New functions may be added with software and 4 GPIO pins