Answers Database
Orcad Express: Assigning Pin location constraints and other Xilinx attributes.
Record #4134
Product Family: Software
Product Line: OrCAD
Product Part: Express
Problem Title:
Orcad Express: Assigning Pin location constraints and other Xilinx attributes.
Problem Description:
Urgency: Standard
General Description: Assigning attributes to parts in a Xilinx design
How can I assign attributes to parts and nets in my Xilinx design?
Solution 1:
How to assign attributes to parts and nets in an Orcad/Xilinx design
Attributes may be assigned by adding user-defined properties to the
design with values that are accepted by Xilinx.
To declare a net property and assign it a value:
1.In the schematic page editor, select a wire. Then click the right
mouse button and choose Edit Properties. Express displays the Net
Properties dialog box.
2.Choose User Properties. Express displays the User Properties dialog
box.
3.Choose New. Express displays the New Property dialog box.
4.Specify the new property's name, and supply its value. Then choose
the OK button. Express returns to the User Properties dialog box
and displays the new property and its associated value in the
Properties list.
A) If the user creates an XNF file from Express, the net property
name may be any string you need to document the attribute.
For example, use the following property name and associated
value to place a timing name attribute on a net:
Name: my_time_name
Value: TNM=group1
B) If the user creates an EDN file from Express, the net property
name must be the name of the attribute. For example, use the
following property name and associated value to define a pad
location constraint:
Name: TNM
Value: group1
5.Choose OK twice to exit the dialog boxes and return to the
schematic page editor.
To assign a hierarchical block or part property value
1.In the schematic page editor, select a hierarchical block or part
instance. Click the right mouse button and choose Edit Properties.
Express displays the Edit Hierarchical Block dialog box or the
Edit Part dialog box respectively.
2.Choose User Properties. Express displays the User Properties dialog
box.
3.Choose New. Express displays the New Property dialog box.
4.Specify the new properties name, and supply its value. Then choose
the OK button. Express returns to the User Properties dialog box
and displays the new property and its associated value in the
Properties list.
A) If the user creates an XNF file from Express, the net property
name may be any string you need to document the attribute.
For example, use the following property name and associated
value to define a pin location constraint:
Name: pin_location
Value: LOC=P41
B) If the user creates an EDN file from Express, the net property
name must be the name of the attribute. For example, use the
following property name and associated value to define a pin
location constraint:
Name: LOC
Value: P41
5.Choose OK twice to exit the dialog boxes and return to the
schematic page editor.
See http://www.orcad.com/techserv/vendors/xilinxm1.htm
End of Record #4134 - Last Modified: 08/26/98 13:15 |
