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| Semiconductor ML2516 Analog Storage Speech Recording LSI This version does no more include ML2517 since a full data sheet is available now. This version: 1.03, June 1999 Previous: 1.02, February 1999 Preliminary GENERAL DESCRIPTION ML2516 utilises analog storage of speech and sound effects into Flash memory cells. The term "analog" refers to a method that involves the charging of Flash cells with an analog voltage level corresponding to the input waveform at a given sampling point. Therefore, the value of one sample is stored in a single cell or bit. Though we are talking about entirely different methods, compared with digital storage, analog storage, requires only about 1/8th of memory. The ML2516 incorporates over 2 million cells. A sampling frequency of 4.0kHz provided, 8.7 minutes recording and playback time are available. The recorder operate under serial MCU control. An internal oscillation circuit is included in that the device does not need a master clock. Alternatively, an external clock can be applied. Typical applications are for cellular phones, answering machines and voice memos. TARGET FEATURES * Internal 2 megacell analog storage Flash 10000 (min.) erase/write cycles 10 years (min.) data retention Write/read accuracy approx. 8-bit (10mV reference level) * Storage of digital data possible (target) * Two OpAmps for microphone and line input * Serial MCU control * Sampling frequencies: 4.0, 5.3 and 6.4kHz (development target is to include 8kHz sampling) * Sequential and direct recording modes (in direct mode recording is made in selectable memory areas) * Recording times: ca. 5.4 minutes (@6.4kHz) ca. 6.6 minutes (@5.3kHz) ca. 8.7 minutes (@4.0kHz) * Internal LPF (-40dB/oct.) * Internal generation of oscillation * External clock frequency range: 1.0 ~ 8.192MHz * Power supply voltage: +2.7 ~ 3.3V * Maximum current: 45mA (when recording) * Operating temperature: -10 ~ +70C (development target is -40 ~ +85C) * Packages: ML2516: 32-pin TSOP1 (TSOPI32-P-814-0.50-1K) * Order number: ML2516TA For reference, a 4 megacell device, designated the ML2517, is in development as well. Page 1 Semiconductor ML2516 TYPICAL APPLICATION CIRCUIT 100nF 100nF 100nF +3.0V DVDD VDD P1.1 P1.2 RESET CS DI DO SCK MON LOUT AVDD MSC1157 AOUT Host P1.3 MCU P1.4 P1.5 VSS P1.6 ML2516 ML2517 Line in LIN EXTCLK ROSC 30k DGND SG AGND 1F Page 2 Semiconductor PACKAGE DIMENSIONS TSOPI32-P-814-0.50-1K ML2516 Unit in millimeters typically, unless otherwise specified. Page 3 |
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