VS1011 Datasheet, PDF (1/43 Pages) List of Unclassifed Manufacturers – MP3 AUDIO CODEC

VS1011 PRELIMINARY
VS1011
VS1011 - MP3 AUDIO CODEC
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 KiB On-chip RAM for user code / data
• Serial control and data interfaces
• New functions may be added with software
and 4 GPIO pins
Description
VS1011 is a single-chip MP3 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 inter-
faces, 4 general purpose I/O pins, as well as a
high-quality variable-sample-rate stereo DAC, fol-
lowed by an earphone amplifier and a ground buffer.
VS1011 receives its input bitstream through a se-
rial 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 con-
trolled 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
4
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
output
X RAM
Y ROM
Y RAM
Version 0.71, 2004-07-20
1