VS1011 查看數據表（PDF） - Unspecified

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VS1011

MP3 AUDIO CODEC

Unspecified 

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

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