A distributed BIST control scheme for complex VLSI devices

BIST is a viable approach to test today's digital systems. Constraints, such as power, noise, area overhead, and others, limit the possibilities of parallel BIST execution in complex VLSI devices. This paper presents a BIST scheduling process that takes into consideration such constraints, and introduces a new BIST control methodology, that implements the BIST schedule with a highly modular architecture. In fact, due to the uniformity of interface, the BIST control elements are independent of the BIST scheme used in the embedded blocks of a device. This BIST control architecture can provide block level diagnostic information.>