VS1033 Datasheet, PDF (1/70 Pages) List of Unclassifed Manufacturers – MP3/AAC/WMA/MIDI AUDIO CODEC

VS1033a PRELIMINARY
VS1033A
VS1033 - MP3/AAC/WMA/MIDI
AUDIO CODEC
Features
• Decodes MPEG 1 & 2 audio layer III (CBR
+VBR +ABR); layers I & II optional;
MPEG4 / 2 AAC-LC-2.0.0.0 (+PNS);
WMA 4.0/4.1/7/8/9 all profiles (5-384 kbps);
WAV (PCM + IMA ADPCM);
General MIDI / SP-MIDI format 0 files
• Encodes IMA ADPCM from microphone
or line input
• Streaming support for MP3 and WAV
• Bass and treble controls
• Operates with a single clock 12..13 MHz.
• Can also be used with 24..26 MHz clocks.
• Internal PLL clock multiplier
• Low-power operation
• High-quality on-chip stereo DAC with no
phase error between channels
• Stereo earphone driver capable of driving a
30Ω load
• I2S interface for external DAC
• Separate operating voltages for analog, dig-
ital and I/O
• 5.5 KiB On-chip RAM for user code / 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 8 GPIO pins
• Lead-free RoHS-compliant package (Green)
Description
VS1033 is a single-chip MP3/AAC/WMA/MIDI
audio decoder and ADPCM encoder. It contains
a high-performance, proprietary low-power DSP
processor core VS DSP⁴, working data memory,
5 KiB instruction RAM and 0.5 KiB data RAM
for user applications, serial control and input data
interfaces, upto 8 general purpose I/O pins, an
UART, as well as a high-quality variable-sample-
rate mono ADC and stereo DAC, followed by an
earphone amplifier and a ground buffer.
VS1033 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.
mic
audio
line
audio
GPIO
VS1033
MIC AMP
MUX
8
GPIO
DREQ
SO
SI
SCLK
XCS
XDCS
Serial
Data/
Control
Interface
RX
TX
UART
Mono
ADC
I2S
Stereo
DAC
VSDSP⁴
Clock
multiplier
Instruction
RAM
Instruction
ROM
Stereo Ear−
phone Driver
X ROM
audio
L
R
output
X RAM
Y ROM
Y RAM
Version 0.6, 2005-01-05
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