Aadu Adok wrote:
> I need to store some data (hundreds of bytes) in my PIC interrupt
> handler. New byte arrives every 600us. What you think - is serial eeprom
> (like 24LC16B) right choice for handling this task?
>
> I looked around but did'nt find how fast can 24LC16B store one byte. Any
> ideas?

A single byte write will almost certainly be slower, but most EEPROMs can
write a "page" of bytes for the same write time.  Pages vary, but I vaguely
remember some of the 24LC series has pages in the 8,16,32 byte size, and the
the write time was a few mS.  This means the average rate is probably
adequate.

A knee jerk architecture that comes to mind is using two buffers each the
size of the EEPROM page.  When the interrupt routine fills one, it sets a
flag and starts filling the other.  The foreground code writes the filled
buffer to the EEPROM when the flag is set, with appropriate bookkeeping
about swapping buffers.


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