![]() Placement modes are still specified by the command line keys ireg_in_iob/oreg_in_iob/ioreg_in_iob, but also introduces more granular control in the form of attributes at I/O ports: (* NOIOBFF *) - registers are never placed in this IO, (* IOBFF *) - registers must be placed in this IO, in case of failure a warning (not an error) with the reason for nonplacement is issued, _attribute_absence_ - no diagnostics will be issued: managed to place - good, failed - not bad either. Signed-off-by: YRabbit <rabbit@yrabbit.cyou> |
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example | ||
gowin | ||
ng-ultra | ||
xilinx |