Method and device for reconfiguring scan chains in consideration of planning groups

Abstract

The invention provides a method and device for reconfiguring scan chains in consideration of planning groups. The method for reconfiguring the scan chains comprises a first stage reconfiguration and a second stage reconfiguration. The first stage reconfiguration comprises the step of: firstly classifying a plurality of scan chains first, wherein the scan chains with starting and terminating points in the same planning group are scanned in a first scan chain set while the scan chains with the starting and terminating points not in the same planning group are scanned in a second scan chain set; and the scan chains with the starting and terminating points in a top layer are scanned in a third scan chain set; and then reconfiguring the scan chains in the first scan chain set in sequence first, then reconfiguring the scan chains in the third scan chain set finally. By the method and the device for reconfiguring the scan chains, the starting and terminating point position information of the scan chains is taken into consideration from the global perspective so that the scan chains penetrate through the planning groups as less as possible, thereby greatly reducing the ports on the planning groups and connecting lines among the planning groups and lowering the requirements on resources and the difficulty of subsequent design.

Description

technical field [0001] The invention relates to a scan chain reconfiguration method and device, in particular to a scan chain reconfiguration method and device in the planning and design stage of a chip module. Background technique [0002] When planning and designing a module for a chip including a test chain, the arbitrary distribution of scanning components will cause too many connections between various planning groups. At the same time, each planning group also needs to create more ports to undertake the input and output of scanning signals. This makes each planning group require a lot of resources when applied at the top level, thus increasing the difficulty of design. In order to reduce the number of ports on the plan group and the number of connections between the groups caused by the scan chain passing through the plan group, it is necessary to restructure the scan chain, that is, to adjust the positions of the scan components to form a new scan chain. [0003] f...

AI Technical Summary

Problems solved by technology

[0005] In view of this, the industry still needs a scan chain reconstruction technology solution to solve the problem of too many ports on the planning group and too many connections between groups

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