Hi Shuqing, For F28003x devices, they can use any of the peripheral boot options in the boot ROM (as shown in Table 4-5 from the TRM ) to update their bootloader. However, please be aware that these ROM bootloaders only load code into RAM so a flash kernel is necessary to program the on-chip flash. I recommend CAN/CAN-FD or SCI bootloading since we offer C2000Ware examples and user guides to demonstrate flash programming with these peripherals. CAN Flash Programming of C2000 Microcontrollers SCI Flash Programming of C2000 Microcontrollers Please let me know if this fits your requirements better. Best, Matt
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