MSM5218 Datasheet, PDF (1/6 Pages) OKI electronic componets – ADPCM Voice Analysis/Synthesis IC

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MSM5218
ADPCM Voice Analysis/Synthesis IC
MSM5218
GENERAL DESCRIPTION
The MSM5218 is a complete voice analysis/synthesis IC featuring the Adaptive Differential Pulse
Code Modulation (ADPCM) method of data compression. The MSM5218 contains an analysis stage
where serial PCM data is compressed to 3- or 4-bit parallel ADPCM data. In addition, a synthesis
stage synthesizes PCM data from ADPCM data.
FEATURES
• ADPCM data compatible with OKI's synthesis IC MSM5205
• Analysis/synthesis switching pin provided
• Lower power consumption achieved by one-chip CMOS IC
• Built-in 10-bit D/A converter for analog output
• Variable sampling frequency (4 kHz, 6 kHz, 8 kHz)
• Master clock frequency: 384 kHz
• Package: 24-pin plastic DIP (DIP24-P-600) (Product name: MSM5218RS)
BLOCK DIAGRAM
V_DD
BIN/TOC
SICK
ADSI
SCON
XT
XT
S₁
S₂
VCK
RESET
12-bit
S•R 12
f SI
OSC
Timing
Circuit
ADPCM
Analyzer
ADPCM
Synthesizer
10 _10-bit
DAC
12 12-bit
S•R
4B/3B
ANA/SYN
D₃
D₂
D₁
D₀
DAOUT
MSB/SO
SOCK
T₁ T₂
V_SS
DAS