Patent ID: 7752510
Filing Date: 2010-07-06
Classification: G01R

Abstract:
1. A test system, comprising: a tester unit; and a test board including a plurality of integrated devices being connected in series, each integrated device comprising: a functional circuit; a test circuit connected to the functional circuit for testing the functional circuit and for providing an error data item; and at least one register element comprising a control input, a data input and a data output, the data input being connected to the test circuit for storing the error data item; wherein the register elements of the plurality of integrated devices are connected in series, wherein a data output of a previous register element is connected to a data input of a subsequent register element and a data output of a last register element is connected to the tester unit, and wherein the tester unit is connected to each integrated device for providing the plurality of integrated devices with test input signals and for providing the control inputs of the register elements of the plurality of integrated devices with control signals, the control signals including a first output signal and a second output signal, wherein the first output signal causes the register elements to store the error data items applied in parallel to data inputs of the register elements in the register elements, and wherein the second signal comprises a number of pulses, each applied pulse causing each register element to shift its content to a next register element and the last register element to output its content to the tester unit.