Answers Database
M1.5i/2.1i: Timing: Instantiated TDO Pad Conflicts With UCF Constraint Causing error baste:263
Record #6662
Product Family: Software
Product Line: Merged Core
Product Part: Timing
Problem Title:
M1.5i/2.1i: Timing: Instantiated TDO Pad Conflicts With UCF Constraint Causing error
baste:263
Problem Description:
Urgency: Standard
General Description:
When the TDO pin either has a location constraint placed
upon it, either as a schematic attribute or in a .ucf file, the
following errors could occur:
ERROR:OldMap:69 - LOC constraint "P76" on TDO symbol
"$I1" (pad signal=TDOOUT) not supported.
In M1.5.29i, when a TDO buf is instantiated in VHDL (FPGA Express Flow) and the TDO pin is also lo
cked in the .ucf file the following fatal error occurs:
ERROR:baste:263 - The LOC constraint "P76" (a TESTDATA location) is not valid
for symbol "M2A<4>.PAD" (pad signal=M2A<4>), which is being mapped to the
following site types:
CLKIOB
IOB
When a schematic test case was run in M1.5.29i, with the constraint on the schematic as a pad attrib
ute, the
following fatal error occurred:
ERROR:baste:16 - LOC constraint "P76" on TDO symbol "$I1" (pad signal=TDOOUT)
not supported.
When the constraint was put in a ucf file in M1.5.29i (and removed from the pad attribute on the sch
ematic)
the following fatal error occurred:
ERROR:baste:16 - LOC constraint "P76" on TDO symbol "$I1" (pad signal=TDOOUT)
not supported.
Solution 1:
To avoid the error, do not put a loc constraint on the TDO pin,
since this pin is already locked down to a specfic location on
the device..
End of Record #6662 - Last Modified: 07/14/99 09:01 |
