MSM9841 Datasheet, PDF (1/9 Pages) OKI electronic componets – Recording and Playback LSI with Built-in FIFO

FEDL9841-04
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MSM9841
Recording and Playback LSI with Built-in FIFO
FEDL9841-04
This version: _MJu_Sl._M20₉0₈0₄₁
Previous version: Jun. 1999
This document contains minimum specifications. For full specifications, please contact your
nearest Oki office or representative.
GENERAL 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
• 16/8-bit bus interface support
• 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)
• Supports four compression algorithms for record and playback:
4, 5, 6, 7, 8-bit ADPCM2; 4-bit ADPCM; 8; 16-bit PCM; and 8-bit Nonlinear PCM
• Sampling frequency: 4.0 kHz, 6.4 kHz, 8.0 kHz, 12.8 kHz, 16.0 kHz, 32.0 kHz* (fosc=4.096 MHz)
• Sampling frequency: 22.05 kHz*, 44.1 kHz* (fosc=5.6448 MHz)
• For the built-in ADC, set the sampling frequency at 16 kHz or less.
• DMA interface support
• Volume control (8 steps: 0 dB to –21 dB)
• Built-in 14-bit A/D converter
• Built-in 14-bit D/A converter
• Built-in low pass filter (LPF) : (input side: analog LPF)
: (output side: digital LPF)
• Power supply voltage: 2.7 V to 5.5 V
• Package:
56-pin plastic QFP (QFP56-P-910-0.65-2K) (Product name: MSM9841GS-2K)
*note 32 kHz, 22.05 kHz and 44.1 kHz are available only for playback.
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