Datasheet

DocID029162 Rev 6 27/208
STM32F413xG/H Functional overview
42
3.17.2 Internal reset OFF
This feature is available only on packages featuring the PDR_ON pin. The internal power-on
reset (POR) / power-down reset (PDR) circuitry is disabled by setting the PDR_ON pin to
low.
An external power supply supervisor should monitor V
DD
and should set the device in reset
mode when V
DD
is below 1.7 V. NRST should be connected to this external power supply
supervisor. Refer to
Figure 7: Power supply supervisor interconnection with internal reset
OFF.
A comprehensive set of power-saving mode allows to design low-power applications.
When the internal reset is OFF, the following integrated features are no longer 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
functionality is no more available and VBAT pin should be connected to V
DD
.
3.18 Voltage regulator
The regulator has three operating modes:
– Main regulator mode (MR)
– Low power regulator (LPR)
– Power-down
Figure 7. Power supply supervisor interconnection with internal reset OFF
(1)
1. The PRD_ON pin is available only on WLCSP81, UFBGA100, UFBGA144 and LQFP144 packages.
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