msm9810 Oki Semiconductor, msm9810 Datasheet - Page 14

• Manufacturer Part Number: msm9810
• Description: 8-channel Mixing Oki Adpcm Type Voice Synthesis Lsi
• Manufacturer: Oki Semiconductor

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minimizing current consumption. At the same time, the control circuit is reset and initialized.
ADPCM2, 8-bit straight PCM, and 8-bit non-linear PCM.
quantization width and encodes 4-bit data for each sampling, so that the follow up to a voice
waveform improves.
because the voice data capacity decreases.
ADPCM. This system is compatible only with MSM9841/MSM9842.
This system is suitable for sound effects, where waveforms change rapidly, and for pulse shape
waveforms.
system is to improve the voice quality of low volume sounds.
4. Reset Function
When “L” level is input to the RESET pin, LSI enters power down state, stopping oscillation and
Power down status is as follows.
Be certain to input “L” level to the RESET pin when power is turned on.
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5. Playback System
This LSI has four types of playback systems to support various voices: 4-bit ADPCM, 4-bit
5-1 4-bit ADPCM
ADPCM (Adaptive Differential Pulse Code Modulation) system adaptively changes the
ADPCM data is converted by using an analysis tool.
For a human voice, animal voice and natural sounds, it is better to use the ADPCM system
5-2 4-bit ADPCM2
In 4-bit ADPCM 2, the follow-up characteristics to a voice waveform is even better than the 4-bit
ADPCM2 data is converted by using an analysis tool.
5-3 8-bit Straight PCM
The follow-up characteristics to a voice waveform to all voice areas is the best of all four types.
5-4 8-bit Non-linear PCM
This system plays back the center of a waveform to be a voice quality equivalent to 10 bits. This
8-bit non-linear PCM data is converted by using an analysis tool.
(1)
(2)
(3)
(4)
Oscillation stops and all internal circuits stop operation.
Current consumption is minimized. When an external clock is in use, input “L” level
to the XT pin in power down status, so that current does not flow into the oscillation
circuit.
When a crystal oscillator is in use, “L” level is output to the XT pin.
GND level is output to the D/A output pin (LDAO, RDAO).
MSM9810
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