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EXEMPLAR: How to insert or disable insertion of global buffers to internal clock nets?
Keywords: fanout, high, leonardo, spectrum, bufg
Leonardo spectrum can insert global buffers to high fanout internal clock nets
automatically. The order of buffer insertion is :
1. Primary clock nets (high priority)
2. Internal clock nets, if there are enough global buffers.
To use this feature turn on this feature (default is false)
set insert_bufs_for_internal_clock true
To turn off this feature on a specific net you can set NOBUFF attribute
on that net.
Eg: set_attribute -net -name NOBUFF -value TRUE <net>
where net is the net which you do not want to buffer.