VS1103b - MIDI/ADPCM AUDIO CODEC Product 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 ... 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 30ohmload 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 Product Description 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. 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. 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. www.vlsi.fi www.megadiy.com www.megadiy.com 
作者：aivenk 2007-9-16 10:46:00 |
