Whoa! Thanks for pointing this out, I completely missed that. I will
have to go with 4 to 8 of the 512 Kilobit chips it seems, though I can't
seem to find where to buy it - Digikey wants a minimum of 360 units ordered.
In fact most places seem to want a minimum order quantity, except arrow
electronics, which isn't listed at microchip.com for all parts.

    One poster said these chips have a 20ms write time. I see 5ms in the
manual though. With the 64 byte write mentioned by the same poster though,
there should be enough time to write all the data, with 20ms or 5ms write
times.

    Another question, are there alternative serial chips out there with more
storage? It could even be volatile storage, since I can make it a
requirement that the data be downloaded to a laptop immediately after
acquisition. I suppose a parallel type chip would do too, but I get the
impression serial is easier to work with for a beginner.

    Thanks to all for the suggestions on adding extra channels, I've already
picked up a lot from these discussions. I am leaning toward the mux solution
for the additional channels, maybe with a daughterboard full of muxes that
can be replaced to add more channels in the future.

Lindsay

----- Original Message -----
From: "Herbert Graf" <mailinglist@FARCITE.NET>
To: <PICLIST@MITVMA.MIT.EDU>
Sent: Sunday, April 07, 2002 7:54 PM
Subject: Re: [PIC] School Project - Flight Data Acquisition


> > Lindsay Pallickal wrote:
> >
> > > 24FC256 serial eeprom - 256k of data storage
> >
> > Are you expecting this chip to be 256K bytes or 256K bits??
>
>         I don't think so, the person said they figured it would give them
about 10
> minutes of storage, I did the math based on 32k bytes and it came out to
> about 12 minutes, so it appears the person does realize it's 256k bits =
32k
> bytes. TTYL
>
> --
> http://www.piclist.com hint: PICList Posts must start with ONE topic:
> [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads
>
>
>

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