Datasheet

Functional overview STM32F745xx STM32F746xx
26/227 DocID027590 Rev 4
Figure 7. PDR_ON control with internal reset OFF
2.18 Voltage regulator
The regulator has four operating modes:
• Regulator ON
– Main regulator mode (MR)
– Low-power regulator (LPR)
– Power-down
• Regulator OFF
2.18.1 Regulator ON
On packages embedding the BYPASS_REG pin, the regulator is enabled by holding
BYPASS_REG low. On all other packages, the regulator is always enabled.
There are three power modes configured by software when the regulator is ON:
• MR mode used in Run/sleep modes or in Stop modes
– In Run/Sleep mode
The MR mode is used either in the normal mode (default mode) or the over-drive
mode (enabled by software). Different voltages scaling are provided to reach the
best compromise between the maximum frequency and dynamic power
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