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Interfacing AT91SAM9260 with cheap SRAM or SRAM?

Started by Mark October 25, 2006
I was hoping to only spend $1 to $2 for 32k SRAM (or SDRAM) to
interface with the AT91SAM9260. Looking at the schematic for the
AT91SAM9260 evaluation board, I can see it uses two Micron
MT48LC16M16A2 32KB SDRAM chips. Looking on digikey.com and avnet.com,
this chip is about $7 in quantities of 10,000, which is much too
expensive for the project.

Does anyone think I will be able to find 32KB SRAM (or SDRAM)  that is
compatible with the AT91SAM9260, and that is around $2?  I am pretty
newbie-ish whenit comes to SRAM/SDRAM so this question may come off as
very stupid. Thanks - mark

Mark wrote:

> I was hoping to only spend $1 to $2 for 32k SRAM (or SDRAM) to > interface with the AT91SAM9260. Looking at the schematic for the > AT91SAM9260 evaluation board, I can see it uses two Micron > MT48LC16M16A2 32KB SDRAM chips. Looking on digikey.com and avnet.com, > this chip is about $7 in quantities of 10,000, which is much too > expensive for the project.
The Micron chips you referred to are 32MB, not kB. How much do you exactly need ? The MT48LC4M16A2P sells for $2.38 at digikey in 10,000 quantities, and is 8MB. If you need kilobytes, you'll need an SRAM, since the SDRAMs aren't that small.
Arlet wrote:
> Mark wrote: > > > I was hoping to only spend $1 to $2 for 32k SRAM (or SDRAM) to > > interface with the AT91SAM9260. Looking at the schematic for the > > AT91SAM9260 evaluation board, I can see it uses two Micron > > MT48LC16M16A2 32KB SDRAM chips. Looking on digikey.com and avnet.com, > > this chip is about $7 in quantities of 10,000, which is much too > > expensive for the project. > > The Micron chips you referred to are 32MB, not kB. > > How much do you exactly need ? The MT48LC4M16A2P sells for $2.38 at > digikey in 10,000 quantities, and is 8MB. > > If you need kilobytes, you'll need an SRAM, since the SDRAMs aren't > that small.
doh! thanks for your help! cant believe i foobared that, but i am happy anyway :)