| 摘要 |
PURPOSE:To curtail necessary memory capacity, by placing a compression mechanism of information on results of test in front of an expected value collating section. CONSTITUTION:A control signal is inputted from a control signal input terminal 11 to operate selectors 4-1 and 4-2 with a controller 8, a circuit 3 to be tested is separated from an internal circuit 2 to fetch a test signal involved from a test signal generating memory section 7 and the signal is supplied to a circuit through the selector 4-1 to implement a function test. Then, the results of testing are inputted into a check sum generation circuit 13 through the selector 4-2 to weight (n) input signals as grouped by the number (m) and output signals are cut down to the number n/m to be inputted into an expected value collating section 5. The collating section 5 collates said output signals with a check sum expected value for the results of testing previously taken out of an expected value memory section 6 with the controller 8 and the results are outputted with an expected value collation results output terminal 12. Thus, necessary memory capacity can be curtailed.
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