Patent ID: 7305603
Filing Date: 2007-12-04
Classification: G01R

Abstract:
1. An apparatus for performing a boundary scan test of a device, comprising: a boundary scan cell defined by an asynchronous flip-flop having a data input connected to receive a data signal from the device during normal operation of the device, a data output connected to an input/output pin of the device, a system clock input connected to receive a system clock signal from the device during normal operation of the device, a set input, and a reset input; and a test controller having a test clock input, a first test data output, and a second test data output, the first test data output being connected to the set input of the asynchronous flip-flop, the second test data output being connected to the reset input of the asynchronous flip-flop, the test controller being configured to control the asynchronous flip-flop through the set input and the reset input during test mode operation of the boundary scan cell.