Patent ID: 7283404
Filing Date: 2007-10-16
Classification: G11C

Abstract:
1. A method of operating a cycle boundary latch (CBL) comprising: providing a master latch coupled to a slave latch; transmitting test data, from a test data input via the master and slave latches to a CBL output, thus defining a test mode of operation; transmitting other data, from another data input, through the CBL to the CBL output via a path that bypasses the master latch, thus defining a functional mode of operation; wherein transmitting the test data comprises transmitting the test data via the master latch to a first input of a switch including the first input, a second input and a switch output that communicates with the CBL output; wherein transmitting the other data comprises transmitting the other data to the second input of the switch; instructing the switch to select the test data at the first input and supply the first data to the switch output, wherein a first clock signal performs the instructing of the switch to select the test data; and instructing the switch to select the other data at the second input and to supply the other data to the switch output, wherein a second clock signal performs the instructing of the switch to select the other data.