| 摘要 |
PURPOSE:To reduce the size of a chip and to enhance a yield by handling a remaining circuit as a logic super LSI having circuit functions except a defective circuit if the remaining circuit operates normally even if part of the LSI has a defect and using in combination with another logic super LSI which performs insufficient circuit function. CONSTITUTION:The internal circuit of a logic super LSI chip 1 is divided into two circuit blocks 2, 3 having the prescribed functions, and an output signal of the block 2 to be inputted to the block 3 and logically processed by the block 2 is always once led out to terminals 4, 5 on the chip 1. In order to further allow the block 3 to logically process with the external wirings, terminals 6, 7 are provided on the chip 1. Similarly, an output signal to be similarly logically processed by the block 3 and to be inputted to the block 2 is similarly handled. When thus constructed, the chip 1 is inspected by an electric probe, and if any block is improper, it is supplemented by another block. |
