The hardware design and realization of IC card electronic door locks controlling system
Abstract：With the progress of technology, the automatic door locks control system which takes the the Single Micro Chip Computer as the core is stepping into people's lives. This paper focuses on the system which takes the series Single Micro Chip Computer MCS-51 as the core, which controls Liquid Crystal Display modules and keyboard scanning through the 8255 chip directly, and contacts the IC card read-write technology. In order to guarantee the security of the door lock's use, the system design offers an comparision between the IC card password and the password which the user input. If inputed password and the IC card password read out on the system read-out are same, the door lock will be opened automaticly. If you input wrong password three times continuously, the system will automatically stop the use of the card, and the alarm will be transmited to the key station promptly through the RS-485 serial telecommunications bus st-bus. The advantage of this design is simple in the hardware circuits, software functional improvements, the control system′s reliablily, and has certain practical. After this system is developed, it can be used in other intelligent electrical appliances' control and has a good application prospect.
Key words : Single Chip Micro Computer, IC cards, Liquid Crystal Display, Electronic door locks