ULINK: Could Not Stop Cortex-M Device
Information in this knowledgebase article applies to:
When I try to connect my ULINK adapter to my target board, I get the following message:
Could not stop Cortex-M device! Please check the JTAG cable
What can cause the error?
This error is an indication that the ULINK adapter cannot control the Cortex-M device. There are many possible reasons for this. Note: This is not an exhaustive list:
If error message appears at beginning of debug mode, try disabling Run to main in Options for Target => Debug tab. This may allow user to step through initial startup or boot code to view more debug information, before the error message.
Last Reviewed: Tuesday, April 4, 2017
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