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Please kindly check if your MCU has CAN bootloader inside first.
You can refer to following KBA for information about 16LX serial writing or programming:
Program with FLASH serial via CAN
To program with serial writer (e.g. YDC products) via CAN to FLASH MCU is supported.
At first of all, boot program (possible to get from YDC) is needed to be programmed already to FLASH MCU, but it can be programmed to FLASH MCU via CAN by it.
very useful information! thankyou!
As a matter of fact, I am not sure that if the bootloader inside the MCU. I do not have source files, I just got firmware file. It begins at 70000H, see attach.
I also upload the firmware file for you , would you please check it for me? thanks!
我们的MCU出厂是没有带CAN Bootloader，通常都是客户自己开发或者第三方开发的。所以抱歉我无法提供帮助。请联系开发你们使用的CAN bootloader相关人员。
关于MB90F497 Bootloader参考例程，请参考下面链接里的UART bootloader.