用伟福Lab2000P单片机实验仪上80C196的HSI功能统计输入的脉冲个数。可以用板上500KHz信号和单脉冲的输出相‘与’得到一定个数的输入脉冲。-By Wei-fu Lab2000P Singlechip Tester on the HSI function 80C196 statistics the number of input pulses. 500KHz signal can be used on-board and single-pulse output phase