4-5 Assign name to each port
Assign port name is to make the netlist more recognizable for Layout VS.
Schematic (LVS) check and Layout Extraction in ICverify. In the mean while,
using
exactly the same names as those you gave in the schematic is highly recommended.
If you don't, ICverify will try to recognize each port by categorization
and even guessing, you will inevitably get warnings/errors.
To assign port name:
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From 'IC Palettes', select 'Easy Edit'.
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Reserve your work for edit by selecting from main menu bar:
File -> Cell -> Reserve
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In your work sheet, select the metal1 you want to be 'VCC' port.
In this example, the 'VCC' port should be the top-most metal1.
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From main menu bar:
Connectivity -> Port -> Make Port:
A prompt dialog bar will appear in the bottom of window.
Figure 4-21. Make port dialog bar
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For the 'Port Name', enter 'VCC'. Make sure the 'Direction'
is 'in'. Then click 'OK'
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Repeat the steps above to assign 'GND', 'IN', 'OUT'
ports.
Note:'GND' and 'IN' are of 'in'
Direction while 'OUT' is of 'out' Direction.
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Now , you have finished the layout. It's time to save your work !
5. Save/Reserve Cell
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Save Cell:
To save your work, from main menu bar:
File -> Cell -> Save Cell
Note: After you save your work, the system will automatically
set your work to 'Read-Only' mode. To set your work to 'Editable'
mode , Please go through the following steps .
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Reserve Cell:
To reserve your work for edit, from main menu bar:
File -> Cell -> Reserve
Then ,the system will set your work to 'Editable' mode.
6. Hierarchy
To attach a layout cell from a different file to the
layout cell in the present file, do the following :
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Easy Edit -> Cell
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Give the complete pathname of the cell to be connected in the "Cell
Name" of the box.
7. Printing
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From main menu bar:
File -> Print -> Print Cell
A dialog box will appear as shown in Fig 6-1.
Figure 6-1. Print Cell dialog box
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Select 'Setup Print ...' the dialog box shown in Fig 6-2 will appear.
Figure 6-2. Setup Print dialog box
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For mono print out, type 'laser' for 'Printer Name' box ljps;
for color print out, type 'djet' for 'Printer Name' box.
Then click 'OK'.
Note: The printer names refer to SCU Design Center printers.
For users outside SCU Design Center, please check with your system administrator
for printer name.
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To print out the layouts, select 'All Layers' at the left corner
dialogue box. Then click 'OK' again.
Note: Layout printing is time consuming. Please
be patient.
Click here to go to 'VLSI Design Flow Using
Mentor-Graphics Tools'