ST STM32F7 Series User Manual

DocID027559 Rev 5 19/54
AN4661 Power supplies
53
Figure 11. Reset circuit
1.3.4 Internal reset ON
On the packages embedding the PDR_ON pin, the power supply supervisor is enabled by
holding PDR_ON high. On the other packages, the power supply supervisor is always
enabled.
For more details about the internal reset ON, refer to the datasheets (DS10915, DS10916).
1.3.5 Internal reset OFF
This feature is available only on the packages featuring the PDR_ON pin. The internal
power-on reset (POR) / power-down reset (PDR) circuitry is disabled through the PDR_ON
pin.
An external power supply supervisor should monitor V
DD
and NRST and should maintain
the device in reset mode as long as V
DD
is below a specified threshold. PDR_ON should be
connected to V
SS
. Refer to Figure 12: Power supply supervisor interconnection with internal
reset OFF.
Figure 12. Power supply supervisor interconnection with internal reset OFF
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ST STM32F7 Series Specifications

General

Brand	ST
Model	STM32F7 Series
Category	Microcontrollers
Language	English