4. We can change the types of Pin Pair combinations that determine how OrCAD X evaluates timing for length matching.
Choose the correct option accordingly.
The Longest Pin Pair option will make the longest connection in that group dictate the length matching limits. The Longest
Driver/Receiver makes the decision based on the longest driver and receiver pin pairs (pin from the transmitter chip to the pin
of the receiver chip) as explained. The All Drivers/Receivers option is the typical safe default. This automatically adjusts the
limits as necessary.
5. Choose the All Drivers/All Receivers for the Match Group, DDR3_D0(7).
For final Electrical constraint set assignments, do the following:
1. Go to the Electrical Constraint Set > Routing > Total Etch Length worksheet. Select the PCI_DIFF (set value to 3500 mils
= 88.900 mm).
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OrCAD X High-Speed Digital Design Guide
