ST STM32H725 User Manual

5.2 Boot pin connection
Figure 13. Boot mode selection implementation example shows the external connection required to select the
boot memory of STM32H723/33, STM32H725/35 and STM32H730 microcontrollers.
Figure 13. Boot mode selection implementation example
VDD
STM32H7
BOOT
10 kΩ
Resistor values are given only as a typical example.
5.3 System bootloader mode
The embedded bootloader code is located in the system memory. It is programmed by ST during production. It is
used to reprogram the Flash memory using one of the following serial interfaces.
Table 6. STM32H723/733, STM32H725/735 and STM32H730 microcontroller bootloader communication
peripherals shows the supported communication peripherals by the system bootloader.
Table 6. STM32H723/733, STM32H725/735 and STM32H730 microcontroller bootloader communication
peripherals
Bootloader peripherals Bootloader pins
DFU USB OTG FS (PA11/PA12) in device mode
USART1 PA9/PA10
USART2 PA2/PA3
USART3 PB10/PB11 or PD8/PD9
FDCAN1 PH13/PH14 or PD0/PD1
I2C1 PB6/PB9
I2C2 PF0/PF1
I2C3 PA8/PC9
SPI1 PA4/PA5/PA6/PA7
SPI3 PA15/PC10/PC11/PC12
SPI4 PE11 / PE12 / PE13 / PE14
AN5419
Boot pin connection
AN5419 - Rev 2
page 27/50

ST STM32H725 Specifications

General

Brand	ST
Model	STM32H725
Category	Microcontrollers
Language	English