This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

pl455通讯一段时间串口不回复

pl455直接接单片机mc9s8dz60串口,但是通讯一段时间就没有反应,测试vp电压5.3v, vref电压2.5v,V5VA0电压5v,所有电压貌似都是对的,但是pl455就是没有串口数据返回,大概1-2个小时就会出现,请教下这个问题?谢谢