6.6. Connections - hierarchical pins

6.6. Connections - hierarchical pins

You will create here points of connection (hierarchy pins) for the symbol which has been just created.

These points of connection are similar to normal component pins, with however the possibility to connect a complete bus with only one point of connection.

There are two ways to do this:

• Place the different pins before drawing the sub-sheet (manual placement).
• Place the different pins after drawing the sub-sheet, and the global labels (semi-automatic placement).

The second solution is quite preferable.

Manual placement:

• To select the tool .
• Click on the hierarchy symbol where you want to place this pin.

See below an example of the creation of the hierarchical pin called “CONNEXION”.

You can define its graphical attributes, and size or later, by editing this pin sheet (Right click and select Edit in the PopUp menu).

Various pin symbols are available:

• Input
• Output
• Bidirectional
• Tri-State
• Passive

These pin symbols are only graphic enhancements, and have no other role.

Automatic placement:

• Select the tool .
• Click on the hierarchy symbol from where you want to import the pins corresponding to global labels placed in the corresponding schematic. A hierarchical pin appears, if a new global label exists, i.e. not corresponding to an already placed pin.
• Click where you want to place this pin.

All necessary pins can thus be placed quickly and without error. Their aspect is in accordance with corresponding global labels.