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What may cause Uboot broken or flushed after a power down case?



Hello,TIer.

Our product based on DM8168 is used by our customer.Somedays ago,When our dm8168 product is used,and then the whole room is power down.After repower the system,the dm8168 can't boot up.

We find that the there is no character printed through UART port.We can communicate dm8168 through emulator.Then we flash the uboot to dm8168.It is back to normal.

In what situation,the uboot can be broken or flushed?

PS:We are using DM8168BCYG2 with DVRRDK 3.0

BR.