Answers Database
M1.4 CPLD - Fitter report & timing simulation (F1.4) gives incorrect equations.
Record #3803
Product Family: Software
Product Line: CPLD Implementation
Product Part: CPLD
Product Version: 1.4
Problem Title:
M1.4 CPLD - Fitter report & timing simulation (F1.4) gives incorrect equations.
Problem Description:
1. Customer design is a top-level ABEL file for F1.4 (XC9572-7PC84). Timing simulation & fitter repo
rt give wrong results. Functional simualtion works correctly. In the ABEL code, the equation & signa
ls of concern is "ACK=ACKWR # (NB_RD_ACK)(RDCEN)"
In the fitter report under the equations section, ACK has a completely different equation.
2. In the ABEL code, ACKN=!ACK (sounds simple enough). But in the fitter report, ACKN=ACKN_BUFR
Solution 1:
This problem is fixed in the latest M1.4 CPLD Tools Update
available on the Xilinx Download Area:
ftp://ftp.xilinx.com/pub/swhelp/M1.4_alliance/cpld_sol10_m14.tar.Z
ftp://ftp.xilinx.com/pub/swhelp/M1.4_alliance/cpld_sun10_m14.tar.Z
ftp://ftp.xilinx.com/pub/swhelp/M1.4_alliance/cpld_hp10_m14.tar.Z
ftp://ftp.xilinx.com/pub/swhelp/M1.4_alliance/cpld_nt10_m14.zip
These update files also include the changes from previous cpld updates.
All zip files are created using WinZip. To obtain this utility,
access WinZip's web site at http://www.winzip.com
End of Record #3803 - Last Modified: 08/26/98 17:00 |
