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MAX78000 can not run program after flash firmware.

Category: Hardware
Product Number: MAX78000

We design a board with MAX78000 MCU , then we write a UART program. We test with the MAX78000EVKIT first (ARM SWD), It's working.
Then we flash it into MAX78000 on our board with Segger J-link (ARM SWD). We have to plug in and out power many times (we powered our board by 3.3V through VREGI), then the program can run, otherwise the the program cannot run.
Please take a look on our schemtic and help me to find something wrong ?
Thank you,

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