This paper presents a system which automatically incorporates testability circuits into ECL chips. This system incorporates three types of circuit: (1) random access scan circuit, (2) clock suppression circuit for delay fault testing, and (3) pin scan-out circuit for chip I/O pin observation in board testing. Fanout destinations of each gate in the testability circuits are localized on a chip to keep the logical net length within the limit. This system was used to develop the new Fujitsu VP-2000 supercomputer.
['Noriyuki Ito']
Automatic incorporation of on-chip testability circuits