Silicon Labs EFM32: While debugging, I got the error "Connection with device lost. This is likely due to a loss of power or unplugged debug adapter." Please tell me what to do.

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Silicon Labs EFM32: Error "Connection with device lost. This is likely due to a loss of power or unplugged debug adapter." while debugging. Please tell me what to do.

EFx32

The debug path may have been blocked by writing user code (moving to EM4, stopping the HF oscillator, setting the debug pin to disabled). Or the same error occurs even if the watchdog timer is activated.
Erase (unlock) the contents of the flash by referring to another topic.

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