Patent ID: 8301943
Filing Date: 2012-10-30
Classification: G01R

Abstract:
1. A clocked storage device comprising: a storage cell coupled to receive an input, wherein the storage cell is configured to capture a state of the input responsive to a pulse clock generated from a clock signal received by the clocked storage device, and wherein the pulse clock is generated responsive to a first edge of the clock signal that begins a first phase of a clock cycle of the clock signal during use, and wherein a width of the pulse is less than 10% of a width of the first phase of the first clock during use; a latch coupled to receive a scan data input, wherein the latch is configured to be open during a second phase of the clock cycle, and wherein a latched scan data input signal from the latch is provided as the input to the storage cell responsive to scan being enabled; and a multiplexor coupled to receive the latched scan data input signal and to receive a data input to the clocked storage device, and wherein the multiplexor is configured to select between the latched scan data input and the data input to the clocked storage device responsive to a scan enable signal, wherein the multiplexor is configured to select the latched scan data input responsive to an assertion of the scan enable signal indicating that scan is enabled, and wherein an output of the multiplexor is the input to the storage cell.