VS1103b - MIDI/ADPCM AUDIO CODEC<br /><br />Product Features<br /> Mixes three audio sources <br /> General MIDI 1+ / SP-MIDI <br /> WAV (PCM + IMA ADPCM) <br />Microphone or line input <br />Encodes IMA ADPCM from microphone, line input or mixed output <br />Input streams can use different sample rates <br />EarSpeaker Spatial Processing <br />Bass and treble controls <br />Operates with a single 12 ... 13 MHz clock <br />Internal PLL clock multiplier <br />Low-power operation <br />High-quality on-chip stereo DAC with no phase error between channels <br />Stereo earphone driver capable of driving a 30ohmload <br />Separate operating voltages for analog, digital and I/O <br />5.5 KiB On-chip RAM for user code / data <br />Serial control and data interfaces <br />Can be used as a slave co-processor <br />SPI flash boot for special applications <br />UART for debugging purposes <br />New functions may be added with software and 4 GPIO pins <br /><br />Product Description<br />VS1103 is a single-chip MIDI/ADPCM/WAV audio decoder and ADPCM encoder that can handle upto three simultaneous audio streams. It can also act as a Midi synthesizer. <br /><br />VS1103 contains a highperformance, 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. <br /><br />VS1103 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. <br /><br />www.vlsi.fi<br />www.megadiy.com<br /><br />
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