AN3155 datasheet(17/37 Pages) STMICROELECTRONICS

Il numero della parte	AN3155

Spiegazioni elettronici	USART protocol used in the STM32 bootloader

PDF	37 Pages

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Produttore elettronici	STMICROELECTRONICS [STMicroelectronics]

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AN3155

Bootloader command set

All other addresses are considered not valid and are NACKed by the device.

When an application is loaded into RAM and then a jump is made to it, the program must be

configured to run with an offset to avoid overlapping with the first RAM memory used by the

bootloader firmware (refer to STM32 product datasheets and to the “STM32 microcontroller

system memory boot mode” application note - AN2606 for more details about the RAM

offset for the device you are using).

The Jump to the application works only if the user application sets the vector table correctly

to point to the application address.

Some products may return two NACKs instead of one single NACK when Read Protection

(RDP) is active (or Read Potection level 1 is active). To know if a given product returns one

single NACK or two NACKs in this situation, please refer to the known limitations section

relative to that product in AN2606.

Figure 11. Go command: device side

AN3155 Scheda tecnica(PDF) 17 Page - STMicroelectronics