STM32H7 datasheet(27/357 Pages) STMICROELECTRONICS

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DS12110 Rev 10

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STM32H742xI/G STM32H743xI/G

Functional overview

Error code correction (ECC)

Over the product lifetime, and/or due to external events such as radiations, invalid bits in

memories may occur. They can be detected and corrected by ECC. This is an expected

behavior that has to be managed at final-application software level in order to ensure data

integrity through ECC algorithms implementation.

SRAM data are protected by ECC:

•

7 ECC bits are added per 32-bit word.

•

8 ECC bits are added per 64-bit word for AXI-SRAM and ITCM-RAM.

The ECC mechanism is based on the SECDED algorithm. It supports single-error correction

and double-error detection.

3.4

Boot modes

At startup, the boot memory space is selected by the BOOT pin and BOOT_ADDx option

bytes, allowing to program any boot memory address from 0x0000 0000 to 0x3FFF FFFF

which includes:

•

All flash address space

•

All RAM address space: ITCM, DTCM RAMs and SRAMs

•

The System memory bootloader

The boot loader is located in non-user System memory. It is used to reprogram the flash

memory through a serial interface (USART, I2C, SPI, USB-DFU). Refer to STM32

microcontroller System memory Boot mode application note (AN2606) for details.

3.5

Power supply management

3.5.1

Power supply scheme

STM32H742xI/G STM32H743xI/G power supply voltages are the following:

•

VDD = 1.62 to 3.6 V: external power supply for I/Os, provided externally through VDD

pins.

•

VDDLDO = 1.62 to 3.6 V: supply voltage for the internal regulator supplying VCORE

•

VDDA = 1.62 to 3.6 V: external analog power supplies for ADC, DAC, COMP and

OPAMP.

•

VDD33USB and VDD50USB:

VDD50USB can be supplied through the USB cable to generate the VDD33USB via the

USB internal regulator. This allows supporting a VDD supply different from 3.3 V.

The USB regulator can be bypassed to supply directly VDD33USB with

VDD33USB ≈ 3.3 V (see electrical characteristics).

•

VBAT = 1.2 to 3.6 V: power supply for the VSW domain when VDD is not present.

•

VCAP: VCORE supply voltage, which values depend on voltage scaling (1.0 V, 1.1 V,

1.2 V or 1.35 V). They are configured through VOS bits in PWR_D3CR register and

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