Answers Database
2.1i Virtex Map - Map drops inverter when FF pushed into IOB.
Record #7279
Product Family: Software
Product Line: FPGA Implementation
Product Part: map
Product Version: 2.1i
Problem Title:
2.1i Virtex Map - Map drops inverter when FF pushed into IOB.
Problem Description:
Design has an input that is inverted and then registered by a FF. When the
"map -pr b" switch is used, the inverter is trimmed and the FF is pushed into
the IOB (i.e. the logic is incorrect). If the "-pr b" switch is not used, the
inversion is preserved.
This problem has also been seen on output paths.
Solution 1:
This problem is fixed in the latest 2.1i Service Pack available at:
http://support.xilinx.com/support/techsup/sw_updates/
End of Record #7279 - Last Modified: 10/22/99 13:41 |
