MSM9841 Overview
Key Specifications
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.
Key Features
- 16/8-bit bus interface support
- 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)
