[sdiy] SRAM versus DRAM

[Magnus Danielson]

Scott Gravenhorst skrev:
> Dan Snazelle <subjectivity at hotmail.com> wrote:
>>
>> in a project that calls for SRAM can you use DRAM instead?
> 
> Perhaps, but SRAM is _far_ easier to interface to "stuff".
> 
> Learn SRAM first...

I agree. SRAM gets you up and walking. DRAM can get you running... but 
there is more details to be matched. For a first project do SRAM.
SRAM can be had in quite large sizes anyway, so most needs can be 
provided with a simple interface. Modern chips may however require 
different voltage levels, but first do something with traditional 5V 
CMOS chips. DRAM is becomming more and more complex... traditional DRAM 
had their challanges, but it was worth it because of the ease to build 
larger memory banks. The address multiplexing, RAS and CAS signaling and 
timing, the refresh. Not impossible, but for a design done from sratch, 
you need to keep track of your timing diagrams. For simple SRAM you can 
dabble much more before it doesn't work for you.

Cheers,
Magnus