摘 要
语音录放系统以AT89C51单片机为控制核心。ISD2560是一种永久记忆型语音录放电路器件，它具有音质自然、使用方便、单片存放、反复录音、低功耗、抗断电等特点，广泛应用于许多领域。ISD2560省去A/D和D/A转换器，集成度较高，内部包括前置放大器、内部时钟、定时器、采样时钟、滤波器、自动增益控制、逻辑控制、模拟收发器、解码器和480 KB的EEPROM。为降低成本，在最小硬件设计基础上，系统功能尽可能用软件程序实现，利用C51高级C语言编程开发。
关键：词AT89C52单片机，ISD2560，语音录放
前言
单片机是一款功能强大，集成度非常高的数字处理系统。它集成了ADC和PWM的模块而且还有硬件滤波器！它基本上可以处理生活中实时性不太强的数字信号和模拟信号，并实现通信。该课题设计基于AT89C51单片机，介绍和分析了录音器的基本原理，并作出较为简单的录音器模型展示其原理！主要运用了AT89C51单片机内部集成的ADC转换模块以及PWM功能，将从外部接收的模拟信号转换为数字信号，并存储在AT45DB41B存储芯片中，再将从AT45DB041B存储芯片中读取数字信号转化为模拟信号，送到外部的喇叭中进行播放。主要功能有录音，存储，删除，放音等！
Abstract
The voice recording system with AT89C52 MCU as the control core. ISD2560 is a permanent memory type voice recording circuit device, it has the quality of natural, easy to use, a monolithic storage, repeated recordings, low power consumption, power resistance and other characteristics, are widely used in many fields. ISD2560without A / D and D / A converter, high integration level, interior includes a preamplifier, an internal clock, timer, sampling clock, filters, automatic gain control, logic control, analog transceiver, decoder and480 KB EEPROM. In order to reduce the cost, the minimum based on the hardware design, system function as far as possible using a software program, using C51 advanced C programming language
Keywords: AT89C52, ISD2560, voice recording circuit
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目 录
第1章 绪论 ...................................................................................................................................... 1 1.1 引言 ........................................................................................................................................ 1 1.2 数字语音录放系统的发展 .................................................................................................... 1 第2章 单片机控制语音录放系统的设计 ...................................................................................... 2 2.1总体方案论证 ......................................................................................................................... 2 2.2 单片机AT89C52 ..................................................................................................................... 2 2.3 ISD2560语音芯片 ................................................................................................................. 4 第3章 硬件电路及软件实现 .......................................................................................................... 8 3.1 系统硬件电路设计 ................................................................................................................ 8 3.2 系统软件设计 ...................................................................................................................... 10 第5章 总结 .................................................................................................................................... 12 致谢 .................................................................................................................. 错误！未定义书签。 参考文献 .......................................................................................................................................... 13 附录 .................................................................................................................................................. 14 附录1：元器件清单 ................................................................................................................... 14 附录2：作品照片 ....................................................................................................................... 16
附录3：作品照片.......................................................................................................................17
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