Abstract:We address access control of reconfigurable scan networks, like IEEE Std. 1687 networks. We propose an onchip test block to perform: (1) test for faulty scan-chains, (2) localization of faulty scan-chains and (3) repair by excluding faulty scan-chains, and an access control block to (1) control so scanchains (instruments) are only accessed in allowed combinations, (2) detection of access attempts to instrument in not allowed combinations, and (3) monitoring how theses attempts are made. The key features are tw… Show more
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