AR# 6794: 1.5is2 Map : FATAL_ERROR:baste:bastetspec.c:1197:1.87.18.4 - Failed to create DP_PATHDELAY_FROMTO for tspec
AR# 6794
1.5is2 Map : FATAL_ERROR:baste:bastetspec.c:1197:1.87.18.4 - Failed to create DP_PATHDELAY_FROMTO for tspec
説明
Keywords : map. baste, constraint, latch, from to
Urgency: Standard
Problem Description : When a FROMTO constraint is placed on a pad driving an IBUF ending at the G input of a IFFX Latch, the following error is issued by map:
FATAL_ERROR:baste:bastetspec.c:1197:1.87.18.4 - Failed to create DP_PATHDELAY_FROMTO for tspec TSlat Process will terminate. Please call Xilinx support.
ソリューション
A sample timing constraint is :
NET "TEST" TNM_NET = "TNMclk"; TIMESPEC "TSlat" = FROM "TNMclk" TO "LATCHES" 10.000000 ns;
The above constraint caused the error message. A work around is to replace the above constraint with the one below.
NET TEST2 MAXDELAY=10 ns;
Where TEST2 is the output of the IBUF or BUFG that drives the input of the latch.