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Description: VS1103b is a single-chip MIDI/ADPCM/WAV audio decoder and ADPCM encoder that can handle up to three simultaneous audio streams. It can also act as a MIDI synthesizer. VS1103B 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 amp and a common buffer.


VS1103b receives its input bitstreams through serial input buses, which it listens to as a system slave. The input streams are decoded and passed through digital volume controls to an 18-bit oversampling, multi-bit, sigma-delta DAC. Decoding is controlled via a serial control bus. In addition to basic decoding, it is possible to add application specific features, like DSP effects, to user RAM memory.

Available in a LQFP-48 pin 7x7x1.4mm package.

Features:


  • Mixes three audio sources: General MIDI 1+ / SP-MIDI, WAV (PCM + IMA ADPCM), Microphone or line input
  • Encodes IMA ADPCM from microphone, line input or mixed output
  • Input streams can use different sample rates
  • EarSpeaker Spatial Processing
  • Bass and treble controls
  • Operates with a single 12 to 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 boot for special applications
  • UART for debugging purposes
  • New functions may be added with software and 4 GPIO pins

Documents:

Comments 3 comments

  • I want to buy this and hook it up to a circuit that I’m building, but I can’t find a way to connect it!! With the breakout board discontinued for this product, is there another solution that will allow me to incorporate this chip with a prototype/breadboard circuit?

    • Can’t easily include this into a breadboard circuit without deadbugging. You could get an adapter board from e.g. proto-advantage, but it can be a bit pricey. Perhaps e-mail SFE directly asking if the breakout board will be back in stock at some point (the comments for that product showed some ideas for making it better, so perhaps they’re working on a new version - can’t hurt to ask!)

  • Do you guys have plans to offer a text-to-speech audio synthesizer chip?


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