For more details on synchronous versus asynchronous memory design, please refer to AN 210: Converting Memory from Asynchronous to Synchronous for Stratix Design at http://www.altera.com/literature/an/an210.pdf.
Article ID: 000082852 Content Type: Troubleshooting Last Reviewed: 02/13/2006
Is it possible to implement asynchronous RAM in Stratix devices?
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Description The Stratix devices' TriMatrix™ memory blocks can be read asynchronously. However, writing to them must be synchronous.