Unable to prgogram SAMD20 with Atmel ICE and Atmel studio

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#1
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Hi,

 

I'm using Atmel Studio 7 and Atmel ICE to program a SAMD20 device on our custom board.

 

I was able to program the SAMD20 several times. I then used Tools->DeviceProgramming dialog box to erase the chip. The erase failed and thereafter I can't even program the SAMD20 anymore. I can't even read the device ID

 

No matter what I try, I always get the same error msg: Error no device detected: error 4109

 

I've tried restarting Atmel studio and also rebooting my PC but nothing helps. Any tips on how to resolve this issue?

 

thanks

Mia Dawson

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Hi,

 

I've same issue with SAMR21 after a Security Bit set.

 

Can't erase chip any more, even keeping RESET proceed by a power up.

 

Any idea?

 

Paulo