Abstract: Flat panel display technology has gradually developed into mainstream screen display technology, and automated routing is one of the important research tasks in the field of panel circuit and touch screen circuit design. Different routing solutions are required according to different routing requirements, such as fixed resistance routing or equal resistance routing. This type of routing task usually requires the routing with a designated routing area and maximum resistance between the two sets of ports. The resistance of each route is limited within the specified range, so as to meet the requirements of the IC to drive the load. Parallel port rectangular area routing is a common and important routing target, and it is necessary to find a suitable space allocation plan. The resistance-driven intelligent routing algorithm in the rectangular routing area of parallel ports is to group ports during the rout planning, then perform multi-segment pre-routing for each group of ports, and finally adjust the resistance to a limited area with an adaptive step. Three comparison experiments are successfully completed for the routing of 30 parallel port instances. Compared with the simple three-segment routing method and the fixed-step resistance adjustment method, it can effectively reduce the average routing time by about 40% and the average memory by 31%, and the routing resistance compliance rate is 100%.

Key words: fixed resistance routing, parallel port, rectangle border, panel circuit design, space allocation