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before sold external cryristal, there is no problem to download program, but once sold external crystial, and started external crystal in program, then, always failure to download program. error: flash download failed, -"Cortex-M3"

wkevi.1
Associate

‎2020-04-08 07:54 AM

 
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emil28
Senior

‎2020-04-08 09:09 AM

Hello,

Can you give us more details, like the uC used, the board, a schematic...

Emil

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