Design of Dynamically Assignmentable TAM Width for Testing Core-Based SOCs

Test access mechanism (TAM) and testing schedule for system-on-chip (SOC) are challenging problems. Testing schedule must be effective to minimize testing time, under the constraint of test resources. This paper presents a new method based on generalized rectangle packing, as two-dimensional packing. A core cuts into many pieces and utilizes the design of reconfigurable core wrappers, and is dynamic to change the width of the TAM executing the core test. Therefore, a core can utilize different TAM width to complete test