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VS1103B

产品描述MIDI/ADPCM AUDIO CODEC
文件大小600KB,共62页
制造商ETC2
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VS1103B概述

MIDI/ADPCM AUDIO CODEC

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VS1103b
VS1103
B
VS1103b - MIDI/ADPCM AUDIO
CODEC
Features
Mixes three audio sources
General MIDI 1+ / SP-MIDI
WAV (PCM + IMA ADPCM)
Microphone or line input
Encodes IMA ADPCM from microphone,
line input or mixed output
Input streams can use different sample rates
EarSpeaker Spatial Processing
Bass and treble controls
Operates with a single 12. . . 13 MHz clock
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
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 4 GPIO pins
Description
VS1103b is a single-chip MIDI/ADPCM/WAV au-
dio decoder and ADPCM encoder that can handle
upto three simultaneous audio streams. It can also
act as a Midi synthesizer.
VS1103b contains a high-performance, proprietary
low-power DSP processor core VS DSP
4
, work-
ing data memory, 5 KiB instruction RAM and
0.5 KiB data RAM for user applications, serial
control and input data interfaces, 4 general pur-
pose 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 common
buffer.
VS1103b receives its input bitstreams through se-
rial input buses, which it listens to as a system
slave. The input streams are decoded and passed
through digital volume controls to an 18-bit over-
sampling, multi-bit, sigma-delta DAC. Decoding
is controlled via a serial control bus. In addition
to basic decoding, it is possible to add application
specific features, like DSP effects, to user RAM
memory.
mic
audio
line
audio
GPIO
VS1103
MIC AMP
4
GPIO
MUX
Mono
ADC
Stereo
DAC
Stereo Ear−
phone Driver
audio
L
R
output
X ROM
DREQ
SO
SI
SCLK
XCS
XDCS
Serial
Data/
Control
Interface
X RAM
VSDSP
4
Y ROM
RX
TX
UART
Y RAM
Clock
multiplier
Instruction
RAM
Instruction
ROM
Version 1.01, 2007-09-03
1

 
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