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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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AN2606 датащи(PDF) 23 Page - STMicroelectronics |
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AN2606 датащи(HTML) 23 Page - STMicroelectronics |
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23 / 155 page  DocID13801 Rev 21 23/155 AN2606 STM32F10xxx devices bootloader 154 4 STM32F10xxx devices bootloader 4.1 Bootloader configuration The STM32F10xxx bootloader is activated by applying pattern1 (described in Table 2: Bootloader activation patterns). The following table shows the hardware resources used by this bootloader. The system clock is derived from the embedded internal high-speed RC, no external quartz is required for the bootloader execution. Table 6. STM32F10xxx configuration in System memory boot mode Bootloader Feature/Peripheral State Comment USART1 bootloader RCC HSI enabled The system clock frequency is 24 MHz using the PLL. RAM - 512 bytes starting from address 0x20000000 are used by the bootloader firmware. System memory - 2 Kbytes starting from address 0x1FFFF000 contain the bootloader firmware. IWDG - The independent watchdog (IWDG) prescaler is configured to its maximum value and is periodically refreshed to prevent watchdog reset (in case the hardware IWDG option was previously enabled by the user). USART1 Enabled Once initialized, the USART1 configuration is: 8 bits, even parity and 1 Stop bit. USART1_RX pin Input PA10 pin: USART1 in reception mode USART1_TX pin Output push-pull PA9 pin: USART1 in transmission mode SysTick timer Enabled Used to automatically detect the serial baud rate from the host. |
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