多功能电子密码锁的VHDL设计

利用EDA技术，在可编程逻辑器件CPLD上实现了一种多功能电子密码锁。为弥补传统密码锁的不足，进一步提高可靠性，该系统中所有数据的存储、运算都完全由硬件实现。利用VHDL语言对电路进行行为描述，QuartusⅡ软件中的EDA工具进行仿真及下载。整个设计过程采用自顶向下方案，设计效率高，开发成本低。采用了MAXⅡ系列的CPLD作为硬件核心，其功耗低，逻辑执行速度远高于单片机，在安防行业中有较强的市场竞争力。

VHDL design of multifunctional electronic coded lock

A multifunctional electronic coded lock is realized on CPLD by means of EDA technology. To make up the defi-ciencies of traditional coded lock and improve its reliability,the storage and computation of all the data in the system are imple-mented by the hardware. Circuit behaviors are described with VHDL. Simulation and download are implemented by the EDA tool in the software QuartusⅡ. The entire design adopts a top-down scheme with high efficiency and low development cost. The CPLD in the series of MAXII is taken as its hardware core of the coded lock,which has low power consumption and a logic exe-cution ability much stronger than that of single chip,so the electronic coded lock shows a strong market competitiveness in secu-rity industry.