You are using a deprecated Browser. Internet Explorer is no longer supported by Xilinx.
4.1i XC4000 MAP - Connection to TDO pad lost when signal is merged (WARNING::x4kdr:23...The comp..."DIA_RSCI" does not have any pins that are being used")
Keywords: merge, trim, unconnected, IOB, EPIC
MAP loses the connection to a TDO pad when the net driving the TDO pad is merged into another net. The circuit has the following configuration:
The resulting circuit included a configured TDO component with no net attached; this leads to the following DRC warning:
WARNING:x4kdr:23 - Blockcheck: The comp (mapped physical logic cell) "DIA_RSCI" does not have any pins that are being used.
This problem can be avoided by putting a KEEP (no merge) property on the net driving the OBUF:
NET netname KEEP;