| 摘要 |
PROBLEM TO BE SOLVED: To simplify the structure of a circuit by comparing a data output from a device to be measured with an expected data pattern, making determination, temporarily storing the data and the result of the determination according to address data when the result of the determination is entered, and generating an output clock signal based on an output request signal. SOLUTION: As a writing pattern supplied to a device 4 to be measured, a pattern generator 3 outputs a writing pattern A to a driver circuit 2, and a comparator 5 outputs the expected pattern of fail determination time. The driver circuit 2 generates a writing pattern B to be supplied to the device 4 to be measured based on the entered writing pattern A, generates an address B to be accessed, and outputs this to the device 4 to be measured. The comparator 5 compares the data output of the device 4 to be measured with the expected pattern supplied from the pattern generator 3, and outputs determination result data A when there is fail data.
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