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Series equivalent scans across multiple scan topologies

  • US RE47,864 E1
  • Filed: 07/19/2013
  • Issued: 02/18/2020
  • Est. Priority Date: 07/29/2008
  • Status: Active Grant
First Claim
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1. A method for performing series equivalent scans in a target system comprising a complex scan topology with a plurality of branches, the method comprising:

  • performing shift operations in the complex scan topology while scan path connectivity of only one branch of the complex scan topology is enabled, wherein a first branch and a second branch are different test access port technologies, and wherein a first protocol is used to perform shift operations on the first branch and a different second protocol is used to perform shift operations on the second branch; and

    performing capture and update operations in the first branch and the second branch of the complex scan topology in parallel.

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