Boundary Scan has become widespread in recent years. However, Boundary Scan
is less suitable for fast, modern memories, such as SDRAM, because the tes
t method is relatively slow. Philips and Fujitsu have decided to co-operate
in finding a solution to this test problem. The resulting method described
here, called SCITT, only requires an additional 1% silicon and is offered
as a good value addition to Boundary Scan.