MX93032-MI

MX93032 APPLICATION NOTE [M1 VERSION] 1.0 GENERAL DESCRIPTIONS MX93032-M1 is an engine chip on which digital answering machine (DAM) with full duplex speaker phone is implemented. Besides, CAS tone detection capability and FSK decoder for Caller-ID service has also been implemented as well. It provides speech processing / management modules, including speech compression/decompression, silence management, telephone line signal processing, Macronix MX29F16A FLASH management, line echo cancellation and acoustical echo cancellation, etc. The MX93032-M1 has built-in DSP mode and MCU mode. In DSP mode, users do not need external microprocessors and can effectively reduce the overall system cost in DAM with full-duplex speakerphone system. In MCU mode, the MX93032-M1 is controlled by an MCU (micro controller) via a 8 bit parallel or serial interface. 2.0 FEATURES Switchable 4.8kbps/12.8kbps speech compression/ decompression algorithm for message recording/playback. Minimum 15 or 40 minutes of recording time for one 16M bits MX29F16A FLASH based on 12.8K or 4.8K compression rate, respectively. Low (4.8kbps) or High (12.8kbps) compression rate with silence management technique for voice prompt making. Voice prompt can be stored in Flash memory. Support total 127 messages, maximum 7 OGMs and maximum 8 personal mailboxes. DTMF generation and detection with near-end echo cancellation. Provide single low crystal solution (FLL). Built-in DSP mode and MCU mode. In DSP ...