STM32H7 datasheet(28/357 Pages) STMICROELECTRONICS

Part #	STM32H7

Description	32-bit Arm® Cortex®-M7 480MHz MCUs, up to 2MB flash, up to 1MB RAM, 46 com. and analog interfaces

PDF	357 Pages

Scroll/Zoom	100%

Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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28 / 357 page

Functional overview

STM32H742xI/G STM32H743xI/G

28/357

DS12110 Rev 10

ODEN bit in the SYSCFG_PWRCR register. The VCORE domain is split into the

following power domains that can be independently switch off.

–

D1 domain containing some peripherals and the Cortex®-M7 core.

–

D2 domain containing a large part of the peripherals.

–

D3 domain containing some peripherals and the system control.

During power-up and power-down phases, the following power sequence requirements

must be respected (see Figure 3):

•

When VDD is below 1 V, other power supplies (VDDA, VDD33USB, VDD50USB) must

remain below VDD + 300 mV.

•

When VDD is above 1 V, all power supplies are independent.

During the power-down phase, VDD can temporarily become lower than other supplies only

if the energy provided to the microcontroller remains below 1 mJ. This allows external

decoupling capacitors to be discharged with different time constants during the power-down

transient phase.

Figure 3. Power-up/power-down sequence

1. VDDx refers to any power supply among VDDA, VDD33USB, VDD50USB.

MSv47490V1

0.3

VBOR0

3.6

Operating mode

Power-on

Power-down

time

VDDX

(1)

VDD

Invalid supply area

VDDX < VDD + 300 mV

VDDX independent from VDD

STM32H7 Datasheet(PDF) 28 Page - STMicroelectronics