1) Give priority to the key signal line or the signal line with rules, check the rules, and require the key signal lines with rules to meet the corresponding requirements.

Constraint rules; secondly, non-critical signal line routing, overall rule checking, requiring non-critical signal lines to meet common design requirements; comprehensive use of routing strategies to resolve conflicts.

Post-processing the wiring to improve signal quality and facilitate processing.

2) Rule priority: If a rule exists, the signal line required by the rule is preferentially arranged, and then the non-critical signal line is arranged.

3) Critical signal line priority: priority transmission of key signals such as power supply, analog signal, high-speed signal, clock signal, differential signal and synchronization signal.

4) Density priority: Start wiring from the most complicated device on the board, and start wiring from the most dense area on the board.

5) The vias, line widths, and safety spacing are avoided.

6) The distance from the line to the edge of the board is usually ≥ 2mm. If the condition is not met, at least 20mil is guaranteed;

7) Provide a special wiring layer for key signals such as clock signals, high-frequency signals, and sensitive signals, and ensure the minimum loop area. Signal quality is ensured by means of shielding and increased safety spacing.

8) The EMC environment between the power supply layer and the ground layer is poor, and the signal line sensitive to interference should be avoided.

9) Follow the rules of ground loop, crosstalk control rules, shield protection, chamfering, device removal, 3W, 20H and other rules.