After the MCU or the microcomputer system is subjected to strong interference, the program may be out of control, causing the CPU to enter an infinite loop or causing the program to run away. The "watchdog" technology can continuously monitor the running time of the program. Once the time limit is exceeded, it is confirmed that the system has "dead" the watchdog immediately resets the CPU and returns it to the normal program flow. The watchdog function can be implemented in both hardware and software.

2, instruction redundancy technology

3, software trap technology

4, multiple sampling technology

5, delay to prevent jitter technology

6, timing refresh output

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