VS1011 from VLSI Solution is a single-chip MPEG audio decoder.
The chip contains a high-performance, low-power DSP processor core VS DSP4, working 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, as well as a high-quality variable-sample-rate stereo DAC, followed by an earphone amplifier and a ground buffer.
VS1011 receives its input bitstream through a serial input bus, which it listens to as a system slave. The input stream is decoded and passed through a digital volume control to an 18-bit oversampling, multi-bit, sigma-delta DAC. The 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 the user RAM memory.
Unit price of VS1011 includes MP3 decoding license of Thomson.
