[sdiy] SRAM versus DRAM

[John Luciani]

On Tue, Jun 23, 2009 at 8:15 PM, Dan Snazelle<subjectivity at hotmail.com> wrote:
>
>
> in a project that calls for SRAM can you use DRAM instead?
>
> I know they are fundamentally different in that one type has to be refreshed  but i suppose i do not understand
> WHY the refresh is important
>
> in the case of a digital delay for example

IIRC the DRAM refresh rates are on the order of micro-seconds not the
many milliseconds
you would need in a digital delay.

A number of uC's have DRAM refresh circuitry that automatically does
the refresh for
you. I worked with a Coldfire chip that did.

(* jcl *)

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