MICROCOMPUTER AND METHOD FOR TESTING THE SAME

摘要

[PROBLEMS] To achieve an at-speed test of a source synchronous interface within ASIC at a board level. [MEANS FOR SOLVING PROBLEMS] A microcomputer (ASIC) incorporates a plurality of ICs connected by use of source synchronous interfaces. In an IC on the data transmission side, to begin with, a data output flip-flop (F1) and a sync clock output flip-flop (F2) input test data. Then, a PLL circuit (11) for generating an operation clock in an actual operation generates a clock signal. In accordance with this clock signal, the first and second flip-flops output the test data and the sync clock. On the other hand, in an IC on a data receiving side, data receiving flip-flops (F3,F4) take in the test data outputted from the flip-flop (F1) in accordance with the sync clock outputted from the flip-flop (F2).