基于STC89C52单片机的电子密码锁

Design of Electronic Secure Code Lock Based on STC89C52

为了提高个人资料、部门文件档案的保密性和安全性,采用高速、低功耗且具备ISPI、AP、内部E2PROM功能的STC89C52单片机,设计了保密性更高的电子密码锁,并详细介绍STC89C52单片机内部E2PROM有关的特殊功能寄存器、读写子程序。该电子密码锁的上锁、开锁、修改密码都在片内进行,不涉及外围芯片,减小了PCB面积,降低故障率和成本,提高了可靠性、保密性,值得推广。

In order to improve the security and safety of personal data,archival departments, a new electronic secure code lock with high security is designed based on STC89C52, which has ISP,IAP, Internal E^2 PROM and high speed,low - power. The SFR and reading/writing/erasing sub -routines of STC89C52 Internal E^2 PROM are introduced. The designed lock, unlock and code modifying is done in internal E^2 PROM, hardware - independent,decreased PCB areas, lower cost, reducing the fault rate,improving the reliability,security and safety,it is popularized.