VS1011b Datasheet | VLSI

Features - Decodes MPEG 1 & 2 audio layer 3 (ISO 11172-3), WAV and PCM files - Supports VBR (variable bitrate) for MP3 - Stream support - Can be used as a slave co-processor - Operates with single clock 12.288..14 MHz or 24.576..28 MHz. - Low-power operation - High-quality stereo DAC with no phase er- ror between channels - Stereo earphone driver capable of driving a 30Ω load - Separate 2.5 .. 3.6V operating voltages for analog and digital - 5.5 Ki B On-chip RAM for user code / data - Serial control and data interfaces - New functions may be added with software and 4 GPIO pins Description VS1011b is a single-chip MP3 audio decoder. The chip contains a high-performance, low-power DSP processor core VS DSP4, working memory, 5 Ki B instruction RAM and 0.5 Ki B 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. VS1011b 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 the basic decoding, it is possible to add application specific Features , like DSP effects, to the user RAM memory. VS1011 GPIO GPIO Stereo DAC DREQ SO SI SCLK XCS XDCS Serial Data/ Control Interface VSDSP4 Instruction RAM Instruction ROM Stereo Ear- phone Driver X ROM audio L R...