Hardware/Software Co-testing of Embedded Memories in Complex SOCs

A novel approach for testing embedded memories in complex systems-on-a–chip (SOCs) is presented. The proposed solution aims to balance the usage of the existing on-chip resources and dedicated design for test (DFT) hardware such that the functional power constraints are not exceeded during test while trading-off the testing time against DFT area and performance overhead. The suitability of software-centric and hardware-centric approaches for embedded memory testing is examined and to combine the advantages of both directions, a new built-in self-test (BIST)-based method, called hardware/software co–testing, is introduced. The proposed solution is programmable, scalable and guarantees low routing overhead.