Intel® Quartus® Prime Software
Intel® Quartus® Prime Design Software, Design Entry, Synthesis, Simulation, Verification, Timing Analysis, System Design (Platform Designer, formerly Qsys)

Preserving an Instance

SOkte
Novice
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What is the synthesis attribute for preserving an instance (not register)

example: Blockram instance whose outputs are not used.

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sstrell
Honored Contributor III
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There is none. If a block is not used, it might get optimized away.

 

If you want to do this, the easiest way to do it would be to add virtual pin assignments in the Assignment Editor on the outputs of the block.

 

#iwork4intel

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Kenny_Tan
Moderator
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you can set it as a design partition, once it is set. Usually, it wouldn't simply optimized away the output of your block ram. But you had to make sure that your output of the ram is in the boundary of the design partition.

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