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AN2606 Datasheet(PDF) 1 Page - STMicroelectronics |
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AN2606 Datasheet(HTML) 1 Page - STMicroelectronics |
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1 / 155 page  March 2015 DocID13801 Rev 21 1/155 1 AN2606 Application note STM32 microcontroller system memory boot mode Introduction The bootloader is stored in the internal boot ROM memory (system memory) of STM32 devices. It is programmed by ST during production. Its main task is to download the application program to the internal Flash memory through one of the available serial peripherals (USART, CAN, USB, I2C, SPI, etc.). A communication protocol is defined for each serial interface, with a compatible command set and sequences. This document applies to the products listed in Table 1. They are referred as STM32 throughout the document. The main features of the bootloader are the following: • It uses an embedded serial interface to download the code with a predefined communication protocol • It transfers and updates the Flash memory code, the data, and the vector table sections This application note presents the general concept of the bootloader. It describes the supported peripherals and hardware requirements to be considered when using the bootloader of STM32 devices. However the specifications of the low-level communication protocol for each supported serial peripheral are documented in separate documents. For specifications of the USART protocol used in the bootloader, refer to AN3155. For the specification of the CAN protocol used in the bootloader, refer to AN3154. For the specification of the DFU (USB device) protocol used in the bootloader, refer to AN3156. For the specification of the I2C protocol used in the bootloader, refer to AN4221. For the specification of the SPI protocol used in the bootloader, refer to AN4286. Table 1. Applicable products Type Part number or product series Microcontrollers STM32L0 series: STM32L051xx, STM32L052xx, STM32L053xx, STM32L062xx, STM32L063xx STM32L1 series. STM32L4 series: STM32L476xx, STM32L486xx STM32F0 series: STM32F03xxx, STM32F04xxx, STM32F05xxx, STM32F07xxx STM32F1 series. STM32F2 series. STM32F3 series: STM32F301xx, STM32F302xx, STM32F303xx, STM32F318xx, STM32F328xx, STM32F334xx, STM32F358xx, STM32F373xx, STM32F378xx STM32F4 series: STM32F401xx, STM32F405xx, STM32F407xx, STM32F411xx, STM32F415xx, STM32F417xx, STM32F427xx, STM32F429xx, STM32F437xx, STM32F439xx, STM32F446xx www.st.com |
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