AR# 10796: 3.3.06i Virtex-II PAR - Router unable to complete connections on BLKRAM GLOBAL_LOGIC_1 signals.
3.3.06i Virtex-II PAR - Router unable to complete connections on BLKRAM GLOBAL_LOGIC_1 signals.
Keywords: routed, router, VCC, PWR, unrouted
General Description: A case has been seen where PAR reports 65 signals that are not completely routed. When the design is viewed in FPGA Editor, the signals are all found to be GLOBAL_LOGIC_1 type that are sourced by PWR_VCC_X and connected to DINB0 inputs of block RAMs. (The problem is related to the fact that the BLKRAM comps are part of an RPM macro.)
This problem is being investigated for a possible fix.
Meanwhile, a work-around is to set the following variable, which changes the PWR/GND routing algorithm:
set VCCGND_OFF=1 (PCs) setenv VCCGND_OFF 1 (Work Stations)