David Duffy (AVD) escribi=F3:
> For our open source text messaging system, we need to buffer incoming =

> and outgoing messages in SRAM, as the lower end  PICs have nowhere near =

> enough RAM for the application.
> =

> Microchip have their SPI 23xx series but only in 1.9V & 3.6V types. What =

> are others using that's readily available, SPI and not too expensive?
> David...
> =


Which is your target cost? and how much ram do you need? Is =

3.6V a problem? Are you using 5V?

An 18Fxxjxx device costs less than 3 dollars and there are =

devices with about 4Kbytes of ram, you can store about 30 =

messages there if you want to buffer them.  And yes this =

pics work at 3.6V

On the other hand you could use FRAM memories (can work at =

about 15MHz with and can store data in case of power =

failures), they are fast but not very very cheap.

Is just a thought...


-- =

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Mauricio Giovagnini (Maunix)
www.maunix.com.ar
Cordoba, Arg.
LinkedIn Profile: http://www.linkedin.com/in/mgiovagnini
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