Microchip and Atmel makes a whole range of serial Flash and
EEPROM devices, some as large as 1 Mbit (maybe larger now?). You
can get them in I2C and SPI versions, some in as small as 8 pin
surface mount packages. Your data write rate might force you to
use a device that can do "page writes", since most byte write
delay times are usually 5~10mS. Page (or multi-byte) writes could
save you considerable programming time, depending on the device
and your application.

Given your sample/data write rate, you may also want to look at
Ramtron's FRAM. It works like a serial EEPROM (I believe they
have both I2C and SPI interface devices), but does not require a
byte-programming delay like Flash or EEPROM but is still
non-volatile. They work quite nicely for fast writing
non-volatile data. I don't think they have single devices with
the density you're looking for, however.

http://www.ramtron.com/products/standalone.asp

Matt Pobursky
Maximum Performance Systems

On Fri, 8 Mar 2002 11:58:16 -0800, Bill Brooks wrote:
>Although I've been developing software for 17 years now, I'm new
>to PIC programming and my experience with electronics has thus
>far been limited to extremely simple circuits.  As a result, I
>know very little about what different types of components are
>available.
>
>I'm looking at developing a small PIC-based data logger that
>will store the recorded data (at a maximum rate of ~20
>bytes/sec) to some type of non-volatile memory, which should be
>at least 64kbytes in size.
>Someone recently posted a link to a great article on interfacing
>a PIC to compact flash memory cards, which I do plan on doing in
>the near future, but those are overkill for this application and
>they would use way too many pins.
>
>What are my options?  Are there small flash (or some other non-
>volatile mem technology) components that are SIMPLE to address
>and require a small number of pin connections?
>
>Thanks in advance for any help!
>
>Bill.
>

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