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ML22804 bảng dữ liệu(PDF) 22 Page - List of Unclassifed Manufacturers

tên linh kiện ML22804
Giải thích chi tiết về linh kiện  LAPIS Semiconductor ADPCM Algorithm-Based Speech Synthesis LSI
PDF  41 Pages
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nhà sản xuất  ETC2 [List of Unclassifed Manufacturers]
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ML22804 bảng dữ liệu(HTML) 22 Page - List of Unclassifed Manufacturers

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FEDL2280XFULL-04
ML22808/ML22804/Ml22802-XXX
Power Down Function
This LSI has the power down function.
When in a power down state, all the circuits including the oscillator
circuit stop operating, thus minimizing the supply current.
When supplying an external clock to the XT pin, tie
the pin at a “L” level during power down.
The figure below shows a equivalent circuit to an oscillator circuit.
approx. 1 M
Ω
Power down signal
(During power down = “L”)
Master clock inside the
LSI
XT
XT
The Initial Status at Reset Input and the Status at Power Down of Output Pins
The status of relative output pins at reset input and power down is shown below.
Digital
output pin
State
Analog
output pin
State
NCR
“H” level
AOUT
GND level
BUSY
“H” level
Voice Synthesis Algorithm
The ML22804/ML22808-xxx contain four algorithm types to match the characteristic of playback voice: 4-bit
ADPCM2 algorithm, 8-bit straight ADPCM2 algorithm, 8-bit non-linear PCM algorithm, and 16-bit straight
PCM algorithm.
Key feature of each algorithm is described in the table below.
Voice synthesis
algorithm
Applied waveform
Feature
4-bit ADPCM2
Normal voice waveform
LAPIS Semiconductor ’s specific speech synthesis algorithm
of improved waveform follow-up with improved 4-bit ADPCM.
8-bit Nonlinear PCM
Algorithm, which plays back mid-range of waveform as 10-bit
quivalent voice quality.
e
8-bit PCM
Normal 8-bit PCM algorithm
16-bit PCM
High-frequency
components
inclusive
sound effect etc.
Normal 16-bit PCM algorithm
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