Datasheet

Functional overview STM32L486xx
22/258 DocID025977 Rev 6
Note: If these supplies are tied to ground, the I/Os supplied by these power supplies are not 5 V
tolerant (refer to
Table 19: Voltage characteristics).
Note: V
DDIOx
is the I/Os general purpose digital functions supply. V
DDIOx
represents V
DDIO1
or
V
DDIO2
, with V
DDIO1
= V
DD
. V
DDIO2
supply voltage level is independent from V
DDIO1
.
Figure 2. Power supply overview
3.9.2 Power supply supervisor
The device has an integrated ultra-low-power brown-out reset (BOR) active in all modes
except Shutdown and ensuring proper operation after power-on and during power down.
The device remains in reset mode when the monitored supply voltage V
DD
is below a
specified threshold, without the need for an external reset circuit.
The lowest BOR level is 1.71V at power on, and other higher thresholds can be selected
through option bytes.The device features an embedded programmable voltage detector
(PVD) that monitors the V
DD
power supply and compares it to the VPVD threshold. An
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