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MSM9841
 Record/Playback IC with Built-in FIFO Data
Sheet
Documents
| » PDF of this Data Sheet (128 KB) is
available. |
MSM9841.pdf
|
The data
sheet
contains minimum specifications. For full specifications, please
contact your nearest Oki office or
representative.
Description
The
MSM9841 is a mono/stereo record and playback LSI with a built-in 1K bit FIFO for
easy interface with external systems or non-semiconductor memory. It utilizes
multiple record and playback modes, including the new ADPCM2 algorithm, which
allows for even higher quality sound reproduction. The record and playback
functions of the MSM9841 is controlled by an MCU via 8/16-bit bus interface.
Features
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16/8-bit bus interface support |
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FIFO capacity: User-definable (256/512/1024
bits)
(buffering time of 32 ms when using 8 kHz sampling frequency, 4-bit
ADPCM2/ADPCM, and in monaural playback) |
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Supports four compression algorithms for record and playback:
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4, 5, 6, 7, 8-bit ADPCM2; 4-bit ADPCM; 8; 16-bit PCM; and
8-bit Nonlinear PCM |
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Sampling frequency: 4.0 kHz, 6.4 kHz, 8.0 kHz, 12.8 kHz, 16.0
kHz, 32.0 kHz* (fosc=4.096 MHz) |
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Sampling frequency: 22.05 kHz*, 44.1 kHz* (fosc=5.6448 MHz)
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For the built-in ADC, set the sampling frequency at 16 kHz or
less |
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DMA interface support |
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Volume control (8 steps: 0 dB to –21 dB) |
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Built-in 14-bit A/D converter |
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Built-in 14-bit D/A converter |
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Built-in low pass filter (LPF)
: (input side: analog
LPF)
: (output side: digital LPF) |
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Power supply voltage: 2.7 V to 5.5 V |
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Package: 56-pin plastic QFP (QFP56-P-910-0.65-2K)
(Product
name: MSM9841GS-K) |
| *note 32 kHz, 22.05 kHz and 44.1 kHz are available only for playback
| |
