Patent ID: 7516378

Claim:
An integrated circuit comprising: A. bond pads; B. cores of functional circuitry, each core having functional circuitry, functional input leads and functional output leads, the cores being interconnected with one another and with the bond pads, the functional circuitry of at least one of the cores being constructed and arranged only for its functional operation and being free of any scan paths, the functional input leads of the one core being connected only with functional output leads of the other cores and functional output leads of the one core being connected only with functional input leads of the other cores; C. scan distributor circuitry having an input coupled with one bond pad and having parallel outputs, each of the parallel outputs being coupled with one of the functional input leads of the one core circuitry and the parallel outputs being coupled with all of the functional input leads of the one core circuitry, the scan distributor circuitry loading test stimulus data to the parallel outputs simultaneously with receiving test stimulus data from the one bond pad; and D. scan collector circuitry having parallel inputs connected with all of the functional output leads of the one core circuitry and having one output coupled with another bond pad.