March Test for Static 3-Coupling Faults in Random-Access Memories

− A march test of length 30n for detecting static 3-coupling faults in n × 1 random-access memories (RAMs) is presented. To reduce the length of the test, only the coupling faults between physically adjacent memory cells have been considered. The test assumes that the storage cells are arranged in a rectangular grid and that the mapping from logical addresses to physical cell locations is known completely. In this paper any memory fault is modelled by a set of primitive faults. The ability of this march test to detect all primitive 3coupling faults is proved by using an Eulerian graph model. To compare this march test with other published tests, simulation results are also presented in this paper. Key−Words: RAM testing, Static 3-coupling faults, March test, Memory fault simulation.