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AN2606 bảng dữ liệu(PDF) 43 Page - STMicroelectronics

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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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