MSM6688 - ADPCM Solid-State Recorder IC
The MSM6688/6688L is a “solid-state recorder” IC developed using the ADPCM method.
By externally connecting a microphone, a speaker, a speaker drive amplifier, and a dedicated register to store ADPCM data, it can record and play back voice data in a manner similar to a tape recorder.
The MSM6688 sup
