Programmable Voltage Detector (Pvd); Figure 10. Bor Thresholds - ST STM32F423 Reference Manual

RM0430
When the supply voltage (V
generated.
The BOR can be disabled by programming the device option bytes. In this case, the
power-on and power-down is then monitored by the POR/ PDR or by an external power
supervisor if the PDR is switched off through the PDR_ON pin (see
reset (POR)/power-down reset
The BOR threshold hysteresis is ~100 mV (between the rising and the falling edge of the
supply voltage).
5.2.3

Programmable voltage detector (PVD)

You can use the PVD to monitor the V
selected by the PLS[2:0] bits in the
The PVD is enabled by setting the PVDE bit.
A PVDO flag is available, in the
if V is higher or lower than the PVD threshold. This event is internally connected to the
DD
EXTI line16 and can generate an interrupt if enabled through the EXTI registers. The PVD
output interrupt can be generated when V
V rises above the PVD threshold depending on EXTI line16 rising/falling edge
DD
configuration. As an example the service routine could perform emergency shutdown tasks.
) drops below the selected V
DD
(PDR)).

Figure 10. BOR thresholds

power supply by comparing it to a threshold
DD
PWR power control register
PWR power control/status register
drops below the PVD threshold and/or when
DD
RM0430 Rev 8
Power controller (PWR)
threshold, a device reset is
BOR
Section 5.2.1: Power-on
(PWR_CR).
(PWR_CSR), to indicate
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