Testability conditions for two-dimensional bilateral arrays

The authors present different sets of testability conditions for two-dimensional bilateral arrays. Different conditions are established with respect to the dependency of the testing process on the signal flow. Each set of testability conditions establishes the controllability and observability of every test vector. These testability conditions are proved to be applicable under different processing models as related to the three inputs of each cell in the array. Complexity issues, such as number of test vectors and time units, are also discussed.<>