MX93521FC

MX93521 ALL DIGITAL VOICE RECORDER MACHINE BASED ON THE MX93521 VOCODER CHIP 1. FEATURES Excellent sound quality by adopting 4800bps CELP speech compression alogorithm. Silent Compression algorithm to further compress si lence between speech. Flash Memory Management alogorithm to manage down-graded Flash Memory to store compressed speech data. With silent compression, one 4Mbit flash memory could store up to 18 minutes speech. Support 4/8/16/32 Mbit Samsung Flash Memory or its compatible parts Support both parallel and serial microprocessor inter face. Codec Interface circuit (support both TP3054 and MX93000) Host controllable LCD Module Interface Host writable message header (4 bytes) for identifica -tion or index purpose Powerful Editing Function Varieties of operating function including Rewind, Fast Forward, Repeat and message editing etc. Voice activated recording Use Flash memory to store user data (data bank) Upload/Download speech message data from/to HOST VOCODER mode (VOice COmpressor/ DEcompressoR) Direct CODEC Play Mode (Play PCM/u-Law data re ceived from HOST) Play Voice Prompt from ROM/FLASH memory DTMF tone genarator 2.GENERAL DESCRIPTION This document describes how to implement an all-digital voice recorder using the MX93521 chip. The MX93521 is a Digital Recorder Data Pump which is controlled by an external microprocessor to perform various recorder function. The MX93521 is fully controlled by a HOST controller through a simp...