Patent Document ID: 8788897
Application ID: 13631862
Patent Flag: 1

Claim One:
1. A control cell, comprising a functional scan register having a data input that is arranged as part of a first scan chain and that is arranged to provide an output in response to a scan chain input; and a scanning control register having a control input wherein the scanning control register is arranged as part of a second scan chain that is arranged to provide an output when operating in a scan chain test mode that is arranged to selectively control the output of the functional scan register; wherein the scanning control register is arranged to be transparent when not operating in the scan chain test mode; wherein an input from the first scan chain is latched by the functional scan register and is output by the functional scan register when the output of the scanning control register is a binary logical high value; wherein the output of the functional scan register is arranged to toggle when the output of the scanning control register is a binary logical low value; wherein the output of the functional scan register is at least one of capacitively and inductively coupled to a net-under-test.