Semiconductor integrated circuit device with test interface circuit for performing test on embedded memory from outside

摘要

A first test clock signal and a second test clock signal are generated from a common basic test clock signal using a delay line with a changeable delay time and a delay stage with a fixed delay time. A memory circuit is operated in synchronization with one of the first and second test clock signals, and the memory circuit is provided with a signal/data according to the other test clock signal. Thus, the set-up time and the hold time of a signal for the memory can be measured with accuracy in a memory-merged system LSI.