摘要
本文介绍了以单片机STC89C54RD+为核心的倒计时系统的基本组成,重点阐述了时钟电路、点阵式LED显示电路、ISP在系统编程和倒计时显示内容的设置等关键技术。实践证明,基于上述技术研制的天津农学院本科教学评估倒计时系统具有结构紧凑、价格低廉、可靠性高等特点。
A Conversely Accounting Time System based on STC89C54 RD＋ was introduced in this paper. The clock circuit designing, dot-matrix LED display circuit designing and ISP technique were mainly elaborated. Practices proved that the Conversely Accounting Time System for TJAU （Tianjin Agricultural University） undergraduate instruction evaluation based on the technique has many advantages, such as tight structure, low price and high credibility.
出处
《天津农学院学报》
CAS
2007年第2期37-40,共4页
Journal of Tianjin Agricultural University
基金
天津农学院学生创新基金资助项目"本科教学评估倒计时牌的设计"(无编号)
