VS1103B Datasheet, PDF (1/61 Pages) List of Unclassifed Manufacturers – MIDI/ADPCM AUDIO CODEC

VS1103b
VS1103B
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 DSP⁴, 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
MUX
4
GPIO
DREQ
SO
SI
SCLK
XCS
XDCS
Serial
Data/
Control
Interface
RX
TX
UART
Mono
ADC
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 1.01, 2007-09-03
1