[doc] comment on corner case

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tangxifan 2024-11-26 18:14:17 -08:00
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@ -111,6 +111,8 @@ Clock Routing-related Settings
The following syntax are applicable to the XML definition tagged by ``clock_routing`` in bitstream setting files. The following syntax are applicable to the XML definition tagged by ``clock_routing`` in bitstream setting files.
This is to force the routing for clock tap multiplexers (green line in :numref:`fig_prog_clock_network_example_2x2`) even when they are not used/mapped. If no specified, only the used clock tap multiplexers will be configured to propagate clock signals. This is to force the routing for clock tap multiplexers (green line in :numref:`fig_prog_clock_network_example_2x2`) even when they are not used/mapped. If no specified, only the used clock tap multiplexers will be configured to propagate clock signals.
.. note:: This requires the benchmark has at least 1 global signal. Otherwise, the clock routing will be skipped, and there is no impact from this setting.
.. option:: network="<string>" .. option:: network="<string>"
The ``network`` name to be constrained, which should be a valid name defined in the clock network file (See details in :ref:`file_formats_clock_network`). For example, The ``network`` name to be constrained, which should be a valid name defined in the clock network file (See details in :ref:`file_formats_clock_network`). For example,