Article ID: 000083005 Content Type: Troubleshooting Last Reviewed: 09/11/2012

Can I implement multiple unrelated memories in one MLAB in a Stratix® III device?

Environment

BUILT IN - ARTICLE INTRO SECOND COMPONENT
Description

You can not implement multiple memories that do not share the same address and control bits.

A Stratix III MLAB has 10 ALMs. When you use a MLAB as memory, each of the ALMs can be configured as a 32x2 or a 64x1 wide RAM. Thus you can accomodate upto a  64x10 or 32x20 memory  in one MLAB. All the ALMs share the same address bits.  Hence you can not combime multiple memories with different address bits and implement in a single MLAB.

MLABs can be used to implement either memory or logic. When you are using a MLAB as memory, you will not be able to use the unused ALMs in the MLAB even if you do not use the full capacity (640 bits) of a MLAB. 

Related Products

This article applies to 1 products

Stratix® III FPGAs

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