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AN2606 Datasheet(PDF) 43 Page - STMicroelectronics |
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AN2606 Datasheet(HTML) 43 Page - STMicroelectronics |
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43 / 155 page  DocID13801 Rev 21 43/155 AN2606 STM32F2xxxx devices bootloader 154 The system clock is derived from the embedded internal high-speed RC. No external quartz is required for the bootloader code. 10.1.2 Bootloader selection The figure below shows the bootloader selection mechanism. Figure 12. Bootloader V2.x selection for STM32F2xxxx devices USART3 bootloader (on PB10/PB11) USART3 Enabled Once initialized, the USART3 configuration is: 8 bits, even parity and 1 Stop bit USART3_RX pin Input PB11 pin: USART3 in reception mode USART3_TX pin Output PB10 pin: USART3 in transmission mode USART1 and USART3 bootloaders SysTick timer Enabled Used to automatically detect the serial baud rate from the host. Table 18. STM32F2xxxx configuration in System memory boot mode (continued) Bootloader Feature/Peripheral State Comment |
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