ISD4004+单片机声音发声系统设计+电路图+源程序
毕业论文关键字： 单片机 语音芯片 键盘输入
Abstract
In recent years, with the development of single-chip computer technology and voice IC, intelligent voice products bring people a more convenient service, a more colorful life.This design is based on single chip microcomputer and voice module, main implementation way is by single-chip microcomputer timer scanning the keyboard to read user type in the command module, and then through the SPI communication methods of signal control and calls, voice module so that the corresponding sound voice module.The system includes main control module, voice module, display module, keyboard module and power module, also involves the extension of the programmable parallel input/output interface.The characteristic of this design is directly with the master microcontroller to control the speech synthesis chip, don't need in the voice module embedded small control chip again, simplified the hardware circuit diagram and save for a small control chip driver writing.Voice choose ISD4004 chip, can be directly the voice analog signal input, conversion, and storage, do not need to use broadcast speech processing software to form a large number of audio files then loaded into the chip, the operation is simple and convenient.In order to make the speaker pronunciation is accurate, clear, this design uses special Chinese pinyin pronunciation software to provide a sound source, and design the amplifier and filter circuit to convert to speech signal amplifying, filtering processing.
Key words: single chip microcomputer voice chip keyboard input
目 录
摘要.Ⅰ
AbstractⅡ 1 绪论1
1.1 新型声音发声系统概述1
1.2 本次设计主要任务要求2
1.3 研发方向和技术关键2
1.4 本次设计的改进方向3
2 系统设计方案论证4
2.1 方案选择4
2.1.1 方案一4
2.1.2 方案二4
2.1.3 方案三5
2.2 系统设计原理5
2.3 系统设计框图6
3 硬件设计.7
3.1 主控模块.7
3.1.1 主控芯片的选择论证7
3.1.2 主控芯片简介8
3.1.3 复位及晶振电路9
3.1.3 输入输出（I/O）接口扩展9
3.2 语音模块.11
3.2.1 语音芯片选择论证11
3.2.2 ISD4004芯片简介12
3.2.3 ISD4004寻址机制.13
3.2.4 语音模块组成元件概述17
3.2.5 语音模块组成电路解析18
3.2.6 录音方式选择论证20