摘要
传统的考勤方法,不仅占用大量的授课时间,也不能真实、准确地反映学生出勤情况。根据实际应用的需求,设计了基于U2270B射频芯片和Freescale MCU用于学生考勤系统的RFID阅读器。从阅读器硬件设计和软件设计两方面,详细阐述了125KHz、134.2KHz的双频选择和考勤设备低功耗以及记录存储等功能的实现。
Traditional method in the checking attendance, not only takes the massive teaching time, also cannot really and accurately reflect the students' attendance . According to practical application's demand, we design RFID the microreade based on the radio frequency chip-U2270B and Freescale MCU which is used to check the students' attendance. The paper expounds detailedly how to choose the dual-frequency between 125KHz and 134KHz, how to keep low power consumption of the Attendance System,and how to store records from the software and the hardware designation.
作者
桑静
王宜怀
Sang Jing1 Wang Yi-huai2 (1.Yangzhou Polytechnic College, Yangzhou 225009, China 2. College of Computer Science and Technology of Soochow University, Suzhou 215006 China)
出处
《电脑知识与技术》
2008年第S2期135-136,共2页
Computer Knowledge and Technology
