AR #16083 - 6.1i PACE - If VREF and VR special pins are prohibited at different times, the prohibit commands are not cumulative
6.1i PACE - If VREF and VR special pins are prohibited at different times, the prohibit commands are not cumulative
| AR# | 16083 |
| Topic | SW-Floorplanner/PACE |
| Last Modified | 2007-03-27 00:00:00.0 |
| Status | Archive |
Description
Keywords: PACE, prohibit, VREF, VR, cumulative, 5.1i, 6.1i
Urgency: Standard
General Description:
If VREF and VR special pins are prohibited using the function "IOBs -> Prohibit Special Pins", these commands are not cumulative. For example, if "VREF prohibit" is specified and "VR prohibit" is specified at a later time, the previous prohibit constraints are removed.
Solution
To work around this issue, copy the UCF constraints to a text file (e.g., WordPad), then paste the constraints back into the UCF after the latest prohibit has been specified.This issue should be fixed in the next major software release (after 6.1i).