Atmel has 2Mbyte (if i remember right) that use SPI. They are flash.

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On Tue, 4 May 1999, Chris Lauren wrote:

> Hello there,
>
> I am working on a PIC data logger and I need to store 1 to 2 MB (by 8 bit word
) of data in a non volatile memory, I can use several I2C devices, but I wonder
if anyone out there have seen any large capacity serial EE proms or serial batte
ry backed up ram chips ? (Access speed is not an issue)
>
> Chris
>
>