The scan chain of the length which equalizes the scan chain, is equalized method in order to insert in the integrated circuit which is designed hierarchically, the system and the program

摘要

Topic The scan chain is equalized, the scan chain of the length which is equalized the system and method in order to insert in the integrated circuit which is designed hierarchically are offered.Solutions The system and method in order to equalize the scan chain, further in details, the scan chain which equalizes the load, the system and method in order to insert in the integrated circuit which is designed hierarchically are offered. This method includes with the step which it presumes or calculates maximum scan chain length L, or and while each hierarchical blocking the step which draws up the scan chain of maximum amount of length L. This method and, distributing those which add the scan bit of all remaining most significant levels to the addition scan chain of maximum length LR to the scan chain of addition tip/chip level of maximum length L the scan bit of remainder which is while each hierarchical blocking by using the scan chain of step and the maximum length L which are distributed to the addition scan chain, furthermore includes with the step which draws up the scan chain of tip/chip level by forming the scan chain of addition tip/chip level of maximum length L. Selective figure Figure 1