密碼鎖



摘  要

AT89C51單片機的全稱是單片微型計算機（Single Chip Microcomputer）。為了使用方便，它把組成計算機的主要功能部件：中央處理器（CPU）、數(shù)據(jù)存儲器（RAM）、程序存儲器（ROM、EPROM、E2PROM或FLASH）、定時/計數(shù)器和各種輸入/輸出接口電路等都集成在一塊半導體芯片上，構成了一個完整的計算機系統(tǒng)。與通用的計算機不同，單片機的指令功能是按照工業(yè)控制的要求設計，因此它又被稱為微控制（Microcontroller）。本系統(tǒng)由單片機系統(tǒng)、矩陣鍵盤、LED顯示和報警系統(tǒng)組成。系統(tǒng)能完成開鎖、超時報警、超次鎖定、管理員解密、修改用戶密碼基本的密碼鎖的功能。除上述基本的密碼鎖功能外，還具有調(diào)電存儲、聲光提示等功能，依據(jù)實際的情況還可以添加遙控功能。本系統(tǒng)成本低廉，功能實用。
關鍵詞：AT89C51；矩陣鍵盤；LED顯示；報警系統(tǒng)；密碼鎖；

Abstract

At89C51 monolithic integrated circuit's full title is the monolithic microcomputer (Single Chip Microcomputer). For the easy to operate, it composes computer's major function part: The central processor (CPU), the Randon access memory(RAM), the Read Only Memory (ROM, EPROM, E2PROM or FLASH), fixed time/the counter and each kind of input/output interface electric circuit and so on integrates on together the semiconductor chip, constituted a complete computer system. Is different with the general computer, monolithic integrated circuit's command function is defers to the industrial control the request design, therefore it is called the micro control (Microcontroller). This system by the monolithic integrated circuit system, the matrix keyboard, the LED demonstration and the alarm system is composed. The system can complete the unblanking, the overtime warning, ultra locking, the manager to decipher, the revision user password basic combination lock function. Besides above basic combination lock function, but also has adjusts the electricity to save, functions and so on acousto-optic prompt, rests on the actual situation also to be possible to increase the remote control function. This system cost is inexpensive, the function is practical.
Keyword：AT89C51; Matrix Keyboard; LED display; Alarm System Locks;