Patent ID: 8095839
Filing Date: 2012-01-10
Classification: G01R

Abstract:
1. An integrated circuit comprising: A. bond pads; B. combinational core circuitry having combinational functional circuitry and having functional input leads and functional output leads, the combinational functional circuitry being constructed and arranged only for its functional operation and being free of any scan paths; C. scan distributor circuitry having an input coupled with one bond pad and having parallel outputs, each of the parallel outputs being coupled with a functional input lead of the combinational core circuitry and the parallel outputs being coupled with all of the functional input leads of the combinational core circuitry, the scan distributor circuitry loading functional vector inputs to the parallel outputs in response to receiving functional vector inputs from the one bond pad; D. scan collector circuitry having parallel inputs coupled with all of the functional output leads of the combinational core circuitry and having one output coupled with another bond pad; and E. controller circuitry connected to the scan distributor circuitry, the scan collector circuitry, and the combinational core circuitry, the controller circuitry including an input and an output connected to bond pads separate from the bond pads connected to the scan distributor circuitry and the scan collector circuitry.