Figure 8. Power Supply Supervisor Interconnection With Internal Reset Off - ST STM32H7 3 Series Application Note

Power supplies

Figure 8. Power supply supervisor interconnection with internal reset OFF

The supply ranges which never go below 1.71 V minimum should be better managed by the
internal circuitry (no additional component needed, thanks to the fully embedded reset
controller).
When the internal reset is OFF, the following integrated features are no more supported:
• The integrated power-on reset (POR) / power-down reset (PDR) circuitry is disabled.
•
The brownout reset (BOR) circuitry must be disabled.
• The embedded programmable voltage detector (PVD) is disabled.
•
V
BAT
All the packages, except for the LQFP100, allow to disable the internal reset through the
PDR_ON signal when connected to V
16/48
functionality is no more available and V
DocID029918 Rev 1
pin should be connected to V
BAT
.
SS
AN4938
.
DD