(1) what is the component symbol? Control circuit diagram language used to describe the control lines and control process,
(2) what is the packaging? The actual components, the size of the chips, length, upright, patches, the size of the welding plate and so on with graphic way,
(3) what is the principle diagram? Said circuit board connection between devices on the principle chart,
(4) what is the PCB figure? Structures, LSI on printed circuit board, IC, transistors, resistors, capacitors and other electronic components, and through welding to achieve the electrical connection in the finished product,
(5) what is the component library? Concentration of different components of the position,
(6) what is the PCB package library? What is the network label?
The actual electronic components, chips of various parameters by using the graphical expression comes out, so that can be invoked when draw PCB figure,