describe

VS1053b is a single-chip Ogg Vorbis/MP3/AAC/- WMA/MIDI audio decoder and an IMA ADPCM with a user loadable Ogg Vorbis encoder. It includes a high-performance, proprietary low-power DSP processor core VS DSP4, working data memory, 16 KiB instruction memory, and 0.5+KiB data memory for user applications to run simultaneously with any built-in decoder, serial control, and input data interface, up to 8 universal I/O pins, UART, and a high-quality variable sampling stereo ADC (microphone, line, line+microphone or 2) × Line and stereo DAC, followed by a headphone amplifier and a common voltage buffer.

VS1053b receives its input bit stream through the serial input bus and listens as a system slave. The input stream is decoded and transmitted to an 18 bit oversampled, multi bit, sigma incremental DAC through a digital volume control. Decoding is controlled through a serial control bus. In addition to basic decoding, application specific features such as DSP effects can also be added to the user's RAM memory.

The optional factory programmable unique chip ID provides the foundation for digital rights management or unit recognition functions.

Features

• Decodes Ogg Vorbis;
MPEG 1 & 2 audio layer III (CBR +VBR
+ABR); layers I & II optional;
MPEG4 / 2 AAC-LC(+PNS),
HE-AAC v2 (Level 3) (SBR + PS);
WMA 4.0/4.1/7/8/9 all profiles (5-384 kbps);
WAV (PCM + IMA ADPCM);
General MIDI 1 / SP-MIDI format 0 files
• Encodes Ogg Vorbis with software plugin (available Q4/2007)
• EncodesIMA ADPCM from mic/line (stereo)
• Streaming support for MP3 and WAV
• EarSpeaker Spatial Processing
• Bass and treble controls
• Operates with a single 12..13 MHz clock
• Can also be used with a 24..26 MHz clock
• Internal PLL clock multiplier
• Low-power operation
• High-quality on-chip stereo DAC with no
phase error between channels
• Zero-cross detection for smooth volume
change
• Stereo earphone driver capable of driving a
30 Ω load
• Quiet power-on and power-off
• I2S interface for external DAC
• Separate voltages for analog, digital, I/O
• On-chip RAM for user code and 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 upto 8 GPIO pins

• Lead-free RoHS-compliant package (Green)