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STM32H757II Datasheet(PDF) 26 Page - STMicroelectronics

No. de pieza STM32H757II
Descripción Electrónicos  Dual 32-bit Arm® Cortex®-M7 up to 480MHz and -M4 MCUs, 2MB Flash, 1MB RAM, 46 com. and analog interfaces, SMPS, DSI, crypto
PDF  251 Pages
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Fabricante Electrónico  STMICROELECTRONICS [STMicroelectronics]
Página de inicio  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STM32H757II Datasheet(HTML) 26 Page - STMicroelectronics

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Functional overview
STM32H757xI
26/251
DS12931 Rev 1
Figure 4. Power-up/power-down sequence
1. VDDx refers to any power supply among VDDA, VDD33USB, VDD50USB and VDDDSI.
2. VDD and VDDSMPS must be wired together into order to follow the same voltage sequence.
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 VDD power supply and compares it to a fixed threshold.
The devices remain in Reset mode when VDD is below this threshold,
•
Power-down reset (PDR)
The PDR supervisor monitors VDD power supply. A reset is generated when VDD drops
below a fixed threshold.
The PDR supervisor can be enabled/disabled through PDR_ON pin.
•
Brownout reset (BOR)
The BOR supervisor monitors VDD power supply. Three BOR thresholds (from 2.1 to
2.7 V) can be configured through option bytes. A reset is generated when VDD drops
below this threshold.
MSv47490V1
0.3
1
VBOR0
3.6
Operating mode
Power-on
Power-down
time
V
VDDX
(1)
VDD
Invalid supply area
VDDX < VDD + 300 mV
VDDX independent from VDD



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