This chip if I recall has a 16 bit or 8 bit hard wired select line for
addressing


Dennis




> -----Original Message-----
> From: PDRUNEN@AOL.COM [SMTP:PDRUNEN@AOL.COM]
> Sent: Monday, 4 September 2000 5:18
> To:   PICLIST@MITVMA.MIT.EDU
> Subject:      [PIC]: National vs MicroChip 93LC46
>
> Hi
>
> Some time ago I wrote a routine to access a National Semi
> 93LC46.  It worked find, I limited the code to only accessing one
> byte at a time and allowed extra clock delay time.
>
> Since then, the vendor was moved over to using the MicroChip 93LC46.
> With this chip, they tell me that my software is now giving them a EEPROM
> fault.
>
> The software on power up read/write the $55/$AA to a EEPROM location to
> determine if the EEPROM is working, if not, it will flash an LED fault
> code.
>
> Can anyone tell me if what problems, if any, could be caused by subing a
> MicroChip
> in place of a National?
>
> I had always thought that if your code worked with the National part then
> it
> would work with the MicroChip.  But, the reverse case may not work.
>
> Thanks,
>
> Paul
>
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