Boot Pin Connection; System Bootloader Mode; Table 2. Stm32H743/753Xx Bootloader Communication Peripherals; Figure 15. Boot Mode Selection Implementation Example - ST STM32H7 3 Series Application Note

Boot configuration
4.2

Boot pin connection

Figure 15
STM32H743/753xx microcontrollers.
1. Resistor values are given only as a typical example.
4.3

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 2 shows the supported communication peripherals by the system bootloader.
Bootloader peripherals
24/48
shows the external connection required to select the boot memory of

Figure 15. Boot mode selection implementation example

Table 2. STM32H743/753xx bootloader communication peripherals

DFU
USART1
USART2
USART3
CAN2
I2C1
I2C2
I2C3
I2C4
SPI1
SPI2
DocID029918 Rev 1
Bootloader pins
USB OTG FS (PA11/PA12) in device mode
PA9/PA10
PA2/PA3
PB10/PB11
PB5/PB13
PB6/PB9
PF0/PF1
PA8/PC9
PD12/PD13
PA4/PA5/PA6/PA7
PI0/PI1/PI2/PI3
AN4938