微控制器射频抗扰性与受测引脚类型的关系  

Relationship between radio frequency immunity and type of the pin under test of microcontrollers

作　　者：粟涛[1] 杨叶花[1] 王自鑫[1] 陈弟虎[1] 

机构地区：[1]中山大学物理科学与工程技术学院,广东广州510275

出　　处：《电波科学学报》2013年第4期735-743,共9页Chinese Journal of Radio Science

基　　金：国家自然科学基金(61007026);中山大学青年教师培育项目(111gpy74)

摘　　要：针对微控制器抗扰性表征中杂波注入位置选取的问题,首次系统的研究了微控制器的射频抗扰性与杂波注入引脚类型之间的关系.对电源引脚、数据输入输出引脚和晶振引脚这三类受测引脚所对应的杂波传输路径建立模型,分析抗扰性的特性.发现不同引脚在中低频段的抗扰性都可以用特征值来表征,进而推导出计算此特征值的抗扰度公式.对多种微控制器的抗扰性进行测量,实验结果验证了抗扰度公式的合理性.此文加深了对复杂集成电路抗扰性机制的理解,为抗扰性受测引脚的选取和不同电路抗扰性的比较方法提供了依据.One important issue in characterizing the electromagnetic immunity of the microcontroller is the location for disturbance injection. This paper investigates the dependence of the immunity on the type of the pin under test. The paper con-structs models of the propagation paths of the electromagnetic interference（EMI） for supply pins, digital input/output pins and oscillator pins. Through analysis on the property of the EMI propagation paths, the paper defines a set of fingerprint parameters to characterize the immunity of microcontrollers in the middle frequency range, and derives immunity equations to calculate these parameters. The measure-ment results performed on various microcontrollers present the validation of the im-munity equations. The conclusion helps to understand the immunity mechanism of complicated integrated circuits and establish the criterion for the pin selection and the immunity comparison of different microcontrollers.

关 键 词：微控制器 引脚类型 电磁抗扰性 电磁兼容 集成电路 

分 类 号：TN973[电子电信—信号与信息处理]