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Emergency power-off MC55i | Thales IoT Developer Community

arossi

June 19, 2019 - 12:04pm, 348 views

Hello,

I would like to understand better why the emergency power-off is "dangerous" on MC55i. In the datasheet I read:

"Caution: Use the EMERGOFF pin only when, due to serious problems, the software is not responding for more than 5 seconds. Pulling the EMERGOFF pin causes the loss of all information stored in the volatile memory since power is cut off immediately. Therefore, this procedure is intended only for use in case of emergency, e.g. if MC55i fails to shut down properly."

What does really happen to the module? Is the module writing on its flash and when the power supply is cut off, the flash can be corrupted? Or something else?

Thanks.

Best regards.