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TMS320F280049: bootloader重新上电后不运行

Part Number: TMS320F280049

现象1.刷完bootloader调试器正常运行   2.刷完bootloader通过电源重新上电bootloader不运行(通过CAN没有发报文判断的),重新拔插KL15或断开调试器重新连接后(就是插拔USB的接口就行)后正常运行

3.刷APP后通过电源重新上电APP可以正常运行。

4.在280049M和280049C上bootloader和app都可以正常运行

希望大佬帮我看一下原因