Similarities and differences between Allegro, OrCAD, net alias, port, off page connector and how to select them

In the use of cadence Series tools orcad When drawing schematic diagram , Several symbols have very similar functions , Works in a similar way , But it's not exactly the same , Subtle differences may cause you to make wrong choices when drawing complex schematic diagrams , Do it last DRC An error is reported during detection .

As shown in the figure above , There are three functions , It is the function of placing network symbols ：
1、net alias： Network alias , seeing the name of a thing one thinks of its function , It is to make the connected network easy to remember , Meaningful name .
2. place port： Place a port , A man is his name , That is to put a port , Use a network name to connect two ports .
3. place off-page connector： Place off page connecting symbols
On the schematic diagram , They look like this ：

How to distinguish and use them , Look at the picture and talk ：

1. net alias： There is no independent symbol , Need to put wire On , Its scope of use is limited to On the same schematic page .
2. palce port： This network symbol requires two connected port All have the same properties , For example, all of them are input perhaps ouput, This symbol is generally used in hierarchy diagram design , Characterization is a port with the same attributes .
3. place off-page connector： This symbol is used in Connect the same network of two different schematics , Cannot be used on the same schematic , Otherwise, the report will be wrong .
   From this, we can briefly summarize ：
   The same page is used for network connection net alias, Network connection between different pages place off-page connector, For hierarchy diagram design palce port, Don't mix the three , There will be no mistake .

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