Patent ID: 6900627

Claim:
An apparatus for testing a semiconductor integrated circuit, comprising: a test circuit board constructed so as to exchange a signal with a semiconductor integrated circuit under test, the semiconductor integrated circuit including an analog-to-digital converter circuit for converting an analog signal to a digital signal or a digital-to-analog converter circuit for converting a digital signal to an analog signal; a test ancillary device disposed in the vicinity of the test circuit board, the test ancillary device including data memory for storing digital test data output from the analog-to-digital converter circuit or digital test data produced by converting analog test data output from the digital-to-analog converter circuit into a digital signal, and an analysis section for analyzing the digital test data stored in the data memory; wherein the data memory is divided into two memory sections such that, when digital test data is stored in one memory section, digital test data previously stored in the other memory section is loaded for analysis purpose.