In microcontroller systems, the issue of electromagnetic compatibility (EMC) is one of the most challenging to resolve. It primarily stems from electromagnetic interference (EMI) both inside and outside the system, which can easily lead to abnormal operation of the microcontroller, thereby affecting the stability and reliability of the entire system. Therefore, it is essential to identify these EMI phenomena.
1. Program Runaway
Description: During program execution, electromagnetic interference causes the program counter (PC) value to change, leading the program to jump to unintended addresses and resulting in abnormal program execution.
Impact: Although the system can usually be restored by resetting or using software frame measurement, frequent program runaway can severely affect system stability and user experience.
2. Infinite Loop
Description: During program execution, electromagnetic interference causes the program counter (PC) value to change, leading the program to jump to unintended addresses and resulting in abnormal program execution.
Impact: Although the system can usually be restored by resetting or using software frame measurement, frequent program runaway can severely affect system stability and user experience.
3. Abnormal Program Code Execution
Description: Interference leads to incorrect reorganization or interpretation of program instructions, causing the microcontroller to execute unintended and erroneous program code.
Impact: Such errors may result in incorrect modification of data parameters, erroneous control outputs, or even hardware damage, posing a serious threat to system safety and reliability.
4. Abnormal Data Communication
Description: Electromagnetic interference affects data communication between the microcontroller and external devices or sensors, leading to data loss, errors, or communication interruptions.
Impact: Abnormal data communication can affect the overall functionality and performance of the system, potentially causing the system to fail to respond correctly to external inputs or output erroneous information.
5. Hardware Failure
Description: Electromagnetic interference affects data communication between the microcontroller and external devices or sensors, leading to data loss, errors, or communication interruptions.
Impact: Abnormal data communication can affect the overall functionality and performance of the system, potentially causing the system to fail to respond correctly to external inputs or output erroneous information.
This is an original article by Fan Yi Education. Please indicate the source when reprinting!