Datasheet

Functional overview STM32H750VB STM32H750IB STM32H750XB
22/201 DS12556 Rev 2
Figure 2. Power-up/power-down sequence
1. V
DDx
refers to any power supply among V
DDA
, V
DD33USB
, V
DD50USB
.
3.5.2 Power supply supervisor
The devices have an integrated power-on reset (POR)/ power-down reset (PDR) circuitry
coupled with a Brownout reset (BOR) circuitry:
• Power-on reset (POR)
The POR supervisor monitors V
DD
power supply and compares it to a fixed threshold.
The devices remain in Reset mode when V
DD
is below this threshold,
• Power-down reset (PDR)
The PDR supervisor monitors V
DD
power supply. A reset is generated when V
DD
drops
below a fixed threshold.
The PDR supervisor can be enabled/disabled through PDR_ON pin.
• Brownout reset (BOR)
The BOR supervisor monitors V
DD
power supply. Three BOR thresholds (from 2.1 to
2.7 V) can be configured through option bytes. A reset is generated when V
DD
drops
below this threshold.
MSv47490V1
0.3
1
V
BOR0
3.6
Operating modePower-on Power-down time
V
V
DDX
(1)
V
DD
Invalid supply area V
DDX
< V
DD
+ 300 mV
V
DDX
independent from V
DD
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