CHAPTER 6: Low Power Consumption Mode
214 FM4 Peripheral Manual, Doc. No. 002-04856 Rev. *E
Built-in regulator voltage stabilization wait at return
The CPU automatically secures a voltage stabilization wait time (a few hundred s) for the operation
mode transition of the built-in regulator before returning from Stop mode. After the voltage stabilization
wait time has lapsed, the CPU executes the return operation.
Notes:
− If the priority of an interrupt used for making the CPU return from Stop mode is not set to a level
for making the CPU return from Stop mode, after an interrupt has been generated, the clock
returns from Stop mode, but the CPU does not return from Stop mode and continues stopping.
Therefore, always set the priority of an interrupt used for making the CPU return from Stop mode
to a level that can make the CPU return from Stop mode.
− Before making the CPU transit to Stop mode, ensure that no factor for returning from Stop mode
shown in Table 3-4 has been set. (include the interrupt pending register in the NVIC) If such
factor has been set, clear that factor.
− If the CPU transits to Stop mode during debugging, as the clock supply to the CPU stops, the
CPU cannot return to a RUN mode by using the ICE. Use a reset or an interrupt to make the CPU
return to a RUN mode.
− Before making the CPU transit to Stop mode, ensure that the Flash memory automatic algorithm
has terminated.
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