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ML22804 датащи(PDF) 22 Page - List of Unclassifed Manufacturers |
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ML22804 датащи(HTML) 22 Page - List of Unclassifed Manufacturers |
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22 / 41 page ![]() 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 22/41 |
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