目 录
摘 要..........................................................................................................................................I
Abstract..........................................................................................................................................II
第 1 章 绪论 .................................................................................................................................1
1.1 智能电表的概念..............................................................................................................1
1.2 智能电表的发展背景......................................................................................................1
1.3 智能电表的结构..............................................................................................................2
1.4 智能电表的主要特点......................................................................................................2
第 2 章 主要芯片的介绍 .............................................................................................................4
2.1 微控制器 STC89C51 单片机..........................................................................................4
2.1.1 简介 .....................................................................................................................4
2.1.2 主要特性 .............................................................................................................4
2.1.3 引脚功能 .............................................................................................................4
2.2 电能计量芯片 CS5460A .................................................................................................6
2.2.1 简介 .....................................................................................................................6
2.2.2 主要特征 .............................................................................................................7
2.2.3 引脚功能 .............................................................................................................7
2.3 外部寄存器 X5045..........................................................................................................8
2.3.1 简介 .....................................................................................................................8
2.3.2 主要特性 .............................................................................................................8
2.3.3 引脚功能 .............................................................................................................9
2.4 时钟芯片 DS1302............................................................................................................9
2.4.1 简介 .....................................................................................................................9
2.4.2 主要特性 .............................................................................................................9
2.4.3 引脚功能 ...........................................................................................................10
2.5 74HC138 译码器 ...........................................................................................................10
2.5.1 简介 ...................................................................................................................10
2.5.2 主要特性 ...........................................................................................................10
2.5.3 真值表 ...............................................................................................................11
2.6 LED 数码管 ...................................................................................................................11
第 3 章 总体设计方案 ...............................................................................................................12
3.1 设计功能要求................................................................................................................12
3.2 智能电表的总体方案设计............................................................................................12
第 4 章 硬件部分的组成 ...........................................................................................................14
4.1 电压电流采样模块的设计............................................................................................14
4.1.1 电压调理电路 ...................................................................................................15
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