MSM9842 Overview
The MSM9842 is a mono/stereo playback LSI with a built-in 1K bit FIFO for easy interface with external systems or non-semiconductor memory. It utilizes multiple playback modes, including the new ADPCM2 algorithm, which allows for even higher quality sound reproduction. The playback function of the MSM9842 is controlled by an MCU via 8/16-bit bus interface.
MSM9842 Key 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 AD
- 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)
- DMA interface support
- Volume control (8 steps: 0 dB to -21 dB)
- Built-in 14-bit D/A converter
- Built-in low pass filter (LPF)
- Power supply voltage: 2.7 V to 5.5 V
- Package: 56-pin plastic QFP (QFP56-P-910-0.65-2K) (Product name: MSM9842GA)