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STM8S103F3P3 has a continued fever,temperature:70°C

Question asked by lizhong.zhang on Jan 11, 2017

appearance:

1.NRST PIN work on law electrical level,it has 200mV;
2.UART1_CK work on high electrical level, so Max485 IC can't receive data;
3.MCU has a continued fever,temperature:70°C;
4.It's power supply work normal;
STM8 MCU has four problem, but when reset its power, STM8 can work normal;
We have been troubled by this problem,somebody can give me any Solution,many thanks!

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