Use FRAM from www.ramtron.com

Pailoor

Barry King wrote:

> > Has anyone (I'm sure there is) that has used a pic for datalogging?  More
> > particularly, used an EEPROM  / FLASH /SRAM to store data?  I need to store
> > about 25-30 samples per second for at least 20 seconds.  Any suggestions?
> > It doesn't necessarily have to be non volatile especially if the write rates
> > are too slow for NV, but it would be a nice touch.  I want to store data for
> > later retrieval by a PC.
> We build dataloggers, and our current product uses I2C interfaced
> EEPROM.  MicroChip makes some, as do Atmel, Xicor, and maybe ST
> Microelectronics.  Some are EE, some are Flash.
>
> Watch out for the endurance specs, and make sure your applicaiton is
> smart about how many re-writes it does, how often.
>
> If you want removable cards, look at SanDisk's MultiMedia Cards, or
> ISSI's SerialFlash, or MediaStick.  There's another new one that's
> used on complex cell phones, too...
>
> Many of the datalogger boxes that have come out lately use battery or
> supercap backed SRAM, 'cause its so cheap per bit.  But the parallel
> interface ones use a lot of PIC pins.
>
> ------------
> Barry King, KA1NLH
> Engineering Manager
> NRG Systems "Measuring the Wind's Energy"
> Hinesburg, Vermont, USA
> barry@nrgsystems.com
> "The witty saying has been deleted due to limited EPROM space"

--
Website : http://business.vsnl.com/chiptech


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