[VLSI SOLUTION]

Description
VS1003 is a single-chip MP3/WMA/MIDI audio decoder and ADPCM encoder. It contains a high-performance, proprietary low-power DSP processor core VS_DSP4, working data memory, 5 KiB instruction RAM and 0.5 KiB data RAM for user applications, serial control and input data interfaces, 4 general purpose I/O pins, an UART, as well as a high-quality variable-sample-rate mono ADC and stereo DAC, followed by an earphone amplifier and a common buffer.

Features
• Decodes 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 for MP3 and WAV
• 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 30Ω 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 soft
   ware and 4 GPIO pins