Why do some chip pins in Protel99 PCB turn green and some are normal?

In Protel99 PCB, some chip pins turn green and some are normal: the reason is that the rules are set incorrectly. The solution is to change the minimum value of the rule directly to 0.

Protel99 is a circuit board design software developed by ProklTechnology, which has the characteristics of powerful function, simple interface, easy to learn and understand. At the same time, protel99 software has rich design functions, such as schematic design, printed circuit board design, PCB board design and so on. It can also design 32 signal layers, 16 ground layer and 16 mechanical layer, which is the most popular circuit board on the network at present.

Protel99 software consists of two parts: advanced schematic design and advanced PCB design. Advanced schematic diagram consists of two parts: schematic editor and principle library. In addition, protel99 integrates signal integrity tools, accurate models and circuit board analysis. By using signal integrity analysis in the design cycle, it can help you achieve one-time success and eliminate blindness.