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ULINK: Maximum number of devices supported in a JTAG Chain

Information in this knowledgebase article applies to:

  • ULINK2 Debug Adapter
  • ULINKpro Debug Adapter
  • ULINKplus Debug Adapter


What is the maximum number of devices that are supported in a JTAG chain?


Theoretically, 64 devices are supported in a JTAG chaining by ULINK2 and ULINKpro.

Note, JTAG chaining is currently not supported with ULINKplus, but might be implemented in the Keil MDK versions released after 5.25.


Last Reviewed: Monday, November 9, 2020

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