DocID024130 Rev 2

19/22

AN4231

Application code structure

3.3

Conclusions

STANDBY mode allows maximizing power saving. During the STANDBY mode, all

memories that are not powered down in this mode, enter in a power saving state. This

increases the power saving and the data in the memories are retained.

This application note has described how to manage the STANDBY exit from FLASH to

RAM, using the Z4 core of the device. This is the lowest power consumption mode and also

the fastest for wakeup process because it does not need wait for FLASH initialization.

It is possible (see Figure 8), modifying the RGM init function, to switch from Flash to RAM or

from FLASH to FLASH and to decide which core is used. In case of usage of Z0 core at

STANDBY exit, no MMU configuration is necessary.