| 摘要 |
PURPOSE:To simplify a constitution by storing an output data of an LST to be measured by a line memory, thereafter inputting it to an LSI tester to decide a logic. CONSTITUTION:An input data inputted through a bus 1, terminals 16, 17 from an LSI tester is given to a control circuit 4 through a CRT controller lSI 12 and a high speed buffer 3. A control circuit 9, in accordance with a mode changeover input signal given to a terminal 8, produces a sampling clock (SC) pulse from a master clock pulse applied to a terminal 7. This (SC) pulse is applied to the circuit 4. The circuit 4 synchronizes with this SC pulse, performs a sampling to a drawing data from an LSI 2 fed through the buffer 3 on a data of one line. This sampling data is fed to a line memory 5. The memory 5 successively inputs the data of one line by a shift clock pulse applied through a speed change-over OR circuit 12 from the circuit 9 and the stored data of the one line is successively outputted 6. |
