PKE智能钥匙系统设计

The design of PKE intelligent key system

介绍了一种基于微芯公司PIC16F639和PIC18F4680单片机的汽车无钥匙门禁系统的设计方案。设计了应答器模块的高频发射与低频接收电路,基站模块的高频接收与低频发射电路,并给出了应答器模块的工作流程图。详尽分析了Keeloq加密解密过程以及系统间的通信协议。结果显示,此设计方案能够满足实际应用中的各种通信要求。

This paper puts forward a new scheme of designning passive keyless entry system,which base on the PIC16F639 and PIC18F4680 of Microchip company.Designs the high-fruquency sending and low-frequency receiving hardware circuit of transponder,also the high-fruquency receiving and low-frequency send hardware circuit of base station. Gives the software flowchart of transponder.Analyses the process of Keeloq coding and decoding,moreover the communication protocol between base station and transponder in detail. The results show that this design can meet variety communication requirements in daily application.