> ... the EEADR and EEADRH
> registers form a 2-byte word that holds the 12-bit address
> of the EEPROM location being read. These devices
> (PIC16F685/PIC16F689/PIC16F690) have 4K words of
> program EEPROM with an address range from 0h to
> 0FFFh. The program memory allows one-word reads.
> ...
> 
> So as a test I set EEADRH to b'00000001' and EEADR to 0x00, thinking that it
> should put the value in location 256, but it put the value in location 0.
> I'm pretty sure I've got the BANKSEL's correct since both EEADR and EEADRH
> are in the same bank.  The code is straight out of the datasheet, but let me
> know if you'd like me to post it.
> 
> Is there a trick to using the EEPROM above 255? (and if so, do you have any
> working sample code to do it? :-) )

I think Microchip goofed in its wording. They talk about "program 
eeprom", meaning the (flash) program storage. Not the data eeprom.

Wouter van Ooijen

-- -------------------------------------------
Van Ooijen Technische Informatica: www.voti.nl
consultancy, development, PICmicro products
docent Hogeschool van Utrecht: www.voti.nl/hvu

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