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MS87V1021 - Recording and Playback IC

General Description

The MS87V1021 is a single chip recording and playback IC that is controlled by the microcontroller in serial mode, compresses voice with the 4-bit OKI ADPCM algorithm or 4-bit OKI ADPCM2 algorithm with high tone quality, and has 2-Mbit DRAM in which recorded data is stored and 512-Kbit mask ROM in w

Key Features

  • as Normal Recording and Playback, Delayed playback, Retroactive playback, Fast forwarding, and Rewinding. The internal memory in which voice data is stored allows a recording/playback system to be constructed merely by externally connecting it to a microphone, a speaker driving amplifier, and a speaker.

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Full PDF Text Transcription (Reference)

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OKI Semiconductor MS87V1021 Recording and Playback IC with Built-in 2-Mbit DRAM PEDS87V1021-02 Issue Date: Feb. 20, 2002 Preliminary GENERAL DESCRIPTION The MS87V1021 is a single chip recording and playback IC that is controlled by the microcontroller in serial mode, compresses voice with the 4-bit OKI ADPCM algorithm or 4-bit OKI ADPCM2 algorithm with high tone quality, and has 2-Mbit DRAM in which recorded data is stored and 512-Kbit mask ROM in which fixed messages reside. The MS87V1021 includes such features as Normal Recording and Playback, Delayed playback, Retroactive playback, Fast forwarding, and Rewinding.