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AN2606 Datasheet(PDF) 44 Page - STMicroelectronics |
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AN2606 Datasheet(HTML) 44 Page - STMicroelectronics |
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44 / 155 page  STM32F2xxxx devices bootloader AN2606 44/155 DocID13801 Rev 21 10.1.3 Bootloader version This following table lists the STM32F2xxxx devices V2.x bootloader versions: Table 19. STM32F2xxxx bootloader V2.x versions Bootloader version number Description Known limitations V2.0 Initial V2.x bootloader version When a Read Memory command or Write Memory command is issued with an unsupported memory address and a correct address checksum (ie. address 0x6000 0000), the command is aborted by the bootloader device, but the NACK (0x1F) is not sent to the host. As a result, the next 2 bytes (which are the number of bytes to be read/written and its checksum) are considered as a new command and its checksum. For the CAN interface, the Write Unprotect command is not functional. Instead you can use Write Memory command and write directly to the option bytes in order to disable the write protection.(1) 1. If the “number of data - 1” (N-1) to be read/written is not equal to a valid command code (0x00, 0x01, 0x02, 0x11, 0x21, 0x31, 0x43, 0x44, 0x63, 0x73, 0x82 or 0x92), then the limitation is not perceived from the host since the command is NACKed anyway (as an unsupported new command). |
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