Storage medium of memory in STM32 three boot modes

STM32 The storage medium corresponding to the three boot modes is the three boot modes corresponding to the boot mode. The storage media are all built into the chip. They are:

1) User Flash = Flash built into the chip.

2) SRAM = The RAM area built into the chip is the memory.

3) System Memory = A specific area inside the chip. The chip is preset with a Bootloader in this area when it leaves the factory. This is the ISP program usually called. The content of this area is not modified or erased after the chip is shipped, ie it is a ROM area.

There are two pins BOOT0 and BOOT1 on each STM32 chip. The level of these two pins at the time of chip reset determines the area from which the chip is executed after the chip reset. See below. Table:

stm32 startup mode