> Could you emulate the EEPROM with the PIC? Then you have complete
control
> over the contents and can avoid it being written over.
>
> Assuming you have the pins free and the time to write the code for a
slave
> microwire system.. Haven't tried, could be nasty.

I thought of that, but FTDI chip apparently uses a fairly high bit rate
which would make it difficult to emulate the EEPROM chip.  If they had
used IIC I could use the IIC slave hardware in the PIC, but they used
3-wire serial protocol of chips like the 93LC46B.  I haven't looked up
what that is yet, but I'm assuming the timing would be too tight to
implement a slave in the PIC and still to other things at the same time.


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