Tjaart van der Walt wrote:
>
> I am looking at writing a command parser for an SX28.
> Flying at 50 or 100 MIPS, the program will execute from
> external SPI memory (like a Stamp, just faster). There
> are plenty of SPI EEPROMs out there, but I haven't noticed
> an SPI RAM chip I can use for scratch memory/variables.
> Has anyone seen anything like this?

The new Atmel "Dataflash" has twin buffers for read/write of flash data.
These buffers could also be used for scratch memory.  Clock frequencies
vary from 1 to 15 MHz, size is mega +
Buffers are mostly just over 256 bytes each.

Realtime clock chipz usually have general purpose ram also.

regards,
Graham Daniel.


>
> At a  fraction of the cost, such a parser would emulate
> a real mean micro. Your PC becomes the ICE, and the
> RS232 port the programmer. On-the-fly program updates
> will be real easy too.
>
> --
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