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Posts: 55
Registered: ‎10-25-2016

CPU core could not start

when i connected EFM8UB evaluation and try to  run sample code i am getting

 

J-Link V6.10G Error

communication timed out: Requested 4 bytes,received 0 bytes

could not start CPU Core(errorcode:-1)

how to overcome from these problem???

Posts: 406
Registered: ‎02-21-2014

Re: CPU core could not start

Could you check the power switch on the STK to make sure it's set to 'AEM'?

Posts: 55
Registered: ‎10-25-2016

Re: CPU core could not start

yes it is set to AEM Mode ,actually device is connected but when i upload code in evaluation board that time error is coming ,do u think some file is missing in simplicity studio or problem in evaluation board??/

Posts: 113
Registered: ‎07-12-2016

Re: CPU core could not start

hi @pradnya,

 

Did you even try to upgrade the J-Link FW of the evaluation board ? And how about the FW version of your board.

Do you have any other boards on hand, and how about the performance of others ?

 

Untitled.png

 

Thanks

Posts: 406
Registered: ‎02-21-2014

Re: CPU core could not start

Could you also try erasing the device in the flash programmer after updating the kit firmware (if that doesn't work) ?

 

erase.png

 

If neither of those work, I would open a support ticket to see if we can get your kit replaced. It might also be helpful if we could get your kit to see what's gone wrong with it.

 

 

Posts: 55
Registered: ‎10-25-2016

Re: CPU core could not start

My Board is EFM8UB1 Universal bee kit (ST2000A)

Curently i am using EFM8UB11FI6G(24 pin)on custom board ,i have pcb ,when i connect my custom board everything is working fine and when i connect the evaluation board it is showing error cpu core not detected

Posts: 55
Registered: ‎10-25-2016

Re: CPU core could not start

@BrianL when i try to erase it is showing same error  ,communication timed out

Posts: 406
Registered: ‎02-21-2014

Re: CPU core could not start

And your kit is in Debug Mode: MCU when you attempt to connect to the chip on the kit?

 

MCUDebugMode.png