80196kc系列单片机 循环显示4000h和4001h地址下低四位数据，每次循环开始前led灯齐暗齐亮各3秒，数据显示时间维持3秒-Series single-chip display 80196kc cycle address 4000h and 4001h under the low four figures before the start of each cycle dark QI Liang Qi led lights the second 3, the data show that