Answers Database
M2.1i: Specifying PULLUPs/PULLDOWNs in UCF
Record #5859
Problem Title:
M2.1i: Specifying PULLUPs/PULLDOWNs in UCF
Problem Description:
Urgency: Standard
General Description:
Is it possible to specify pullup/pulldowns components in the UCF.
Solution 1:
Prior to M2.1i one could not specify pullups/pulldows in a ucf or pcf file. PULLUPs and PULLDOWNs
had to be instantiated in either schematic or HDL.
This is now possible in the UCF.
These statements configure the IO to use a PULLUP.
NET "pad_net_name" PULLUP;
INST "pad_instance_name" PULLUP;
For more details, please refer to the chapter titled Attributes, Constraints and Carry Logic
in the Libraries Guide.
End of Record #5859 - Last Modified: 07/26/99 12:19 |
