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Número de pieza | VS1033C | |
Descripción | MP3/AAC/WMA/MIDI AUDIO CODEC | |
Fabricantes | VLSI | |
Logotipo | ||
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VS1033C
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
• EarSpeaker Spatial Processing
• 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
30 Ω load
• Quiet power-on and power-off
• I2S interface for external DAC
• Separate operating voltages for analog,
digital 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 common voltage 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.
EarSpeaker spatial processing provides more nat-
ural sound in headphone listening conditions. It
widens the stereo image and positions the sound
sources outside the listener’s head.
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 1.00, 2008-02-01
1
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VS1033c
VS1033C
CONTENTS
9.4 ADPCM Recording . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
9.4.1 Activating ADPCM mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
9.4.2 Reading IMA ADPCM Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
9.4.3 Adding a RIFF Header . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
9.4.4 Playing ADPCM Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
9.4.5 Sample Rate Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
9.4.6 AD Startup Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
9.4.7 Example Code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
9.5 SPI Boot . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
9.6 Play/Decode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
9.7 Feeding PCM data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
9.8 Extra Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
9.8.1 Common Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
9.8.2 WMA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
9.8.3 AAC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
9.8.4 Midi . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
9.9 Fast Forward / Rewind . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
9.9.1 AAC - ADTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
9.9.2 AAC - ADIF, MP4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
9.9.3 WMA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
9.9.4 Midi . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
9.10 SDI Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
9.10.1 Sine Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
9.10.2 Pin Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Version 1.00, 2008-02-01
5
5 Page VLSI
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VS1033C
4. CHARACTERISTICS & SPECIFICATIONS
4.3 Analog Characteristics
Unless otherwise noted: AVDD=2.7..2.85V, CVDD=2.4..2.7V, IOVDD=CVDD-0.6V..3.6V, TA=-30..+85◦C,
XTALI=12..13MHz, Internal Clock Multiplier 3.5×. DAC tested with 1307.894 Hz full-scale output
sinewave, measurement bandwidth 20..20000 Hz, full analog output load: LEFT to GBUF 30 Ω, RIGHT
to GBUF 30 Ω. Microphone test amplitude 30 mVpp per input pin, f=1 kHz. Line input test amplitude
2.2 Vpp, f=1 kHz. ADC sample rate 48 kHz.
Parameter
Symbol Min Typ Max Unit
DAC Resolution
18 bits
Total Harmonic Distortion
THD
0.1 0.4 %
Dynamic Range (DAC unmuted, A-weighted)
IDR
90
dB
S/N Ratio (full scale signal)
SNR 70 85
dB
Interchannel Isolation (Cross Talk)
75 dB
Interchannel Isolation (Cross Talk), with GBUF
40 dB
Interchannel Gain Mismatch
-0.5 ±0.04 0.5 dB
Frequency Response
Full Scale Output Voltage (Peak-to-peak)
Deviation from Linear Phase
Analog Output Load Resistance
Analog Output Load Capacitance3
-0.1
1.3 1.51
AOLR 16 302
0.1 dB
1.8 Vpp
5◦
Ω
100 pF
Microphone input amplifier gain
Microphone input amplitude, balanced
MICG
26 dB
60 1404 mVpp
Microphone Total Harmonic Distortion
MTHD
0.02 0.10 %
Microphone S/N Ratio
Line input amplitude
MSNR 60 66
dB
2200 AVDD4 mVpp
Line input Total Harmonic Distortion
LTHD
0.02 0.10 %
Line input S/N Ratio
LSNR 75 86
dB
Line and Microphone input impedances
100 kΩ
1 3.0 volts can be achieved with +-to-+ wiring for differential mono sound.
2 AOLR may be much lower, but below Typical distortion performance may be compromised.
3 Requires ESD protection as shown in Figure 3.
4 Above typical amplitude Total Harmonic Distortion increases.
Version 1.00, 2008-02-01
11
11 Page |
Páginas | Total 30 Páginas | |
PDF Descargar | [ Datasheet VS1033C.PDF ] |
Número de pieza | Descripción | Fabricantes |
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