Damaged Mechanism Research of RS232 Interface under Electromagnetic Pulse

RS232 interface executes the role of Transportation and Communication, which has became the important interface between MCU of embedded system and peripheral equipment. Because RS232 mainly work in bottom of communication protocol, so it is important to protect the infrastructure of RS232. In test, pulse double electromagnetic is pulled into RS232 data transmission lines by coupling clamp, simulated differential-mode pulse voltage, basing on the test data, it will get the damaged mechanism of RS232 interface, meanwhile presenting the Logistic model of injected voltage pulse and probability of damage to the port interface, and getting the performance evaluation of RS232 interface, moreover estimating the voltage pulse range of upper and lower bounds at the port in the normal and damage state.