ATPROGRAM utility is taking some secodns to flash 128KB Bytes in flash.

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ATPROGRAM utility is taking 15 secodns to flash 128KB Bytes in flash

 

anybody have any idea to reduce the flashing time. ?

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The user manual gives times for erase and write. What does that work out to?

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try to increase the clock of your debugger. I used a swd interface and added "-cl 2mhz" to atprogram call which made it much faster. Maybe this is your problem as well...

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yes, you are correct. I tried to increase the clock, it works. thanks.