Features
 Laser-fused version of VS1053b
 Decodes
Ogg Vorbis;
FLAC with software plugin;
WAV (PCM + IMA ADPCM)
 Encodes Ogg Vorbis w/ software plugin
 Encodes stereo IMA ADPCM / PCM
 Streaming support for WAV
 Unique serial number for user code protection
 EarSpeaker Spatial Processing
 Bass and treble controls
 Operates with a single 12..13MHz clock
 Can also be used with a 24..26MHz 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
load
 Quiet power-on and power-off
 I2S output interface for external DAC
 Separate voltages for analog, digital, I/
 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 up to 8 GPIO pins
 Lead-free RoHS-compliant package

Description
VS8053b is an audio processor with a high
performance stereo ADC and DAC. Each device
has a factory-programmable unique chip
ID that provides a basis for digital rights management
or unit identification features. VS8053b
supports audio formats that do not require
a license (Ogg Vorbis, PCM, IMA-ADPCM,
FLAC). By using the Ogg Vorbis encoder plugin
the device can be used to build a high performance
and low cost digital audio encoderdecoder
link.
VS8053b contains a high-performance, proprietary
low-power DSP processor core VS_DSP4,
16 KiB instruction RAM and 16 KiB data RAM
for user applications running simultaneously
with built-in decoders, serial control and input
data interfaces, up to 8 general purpose
I/O pins, an UART, as well as a high-quality
variable-sample-rate stereo ADC (mic, line,
line + mic or 2line) and stereo DAC, followed
by an earphone amplifier and a common
voltage buffer.
VS8053b receives its input bitstream through
a serial input bus, which it listens to as a system
slave. The input stream is processed
and passed through a asynchronous sample
rate converter and digital volume control to
an 18-bit oversampling, multi-bit, sigma-delta
DAC.