Why does DATA or EEPROM not work 18f2450 ?

[Bonxy]

Hi

When I use the DATA, EEPROM, READ or WRITE I get the following warnings and the code does not work (no values are stored to eeprom).

'Address exceeds maximum range for this processor'

I tried this in a new blank project an I still get the warnings

PBP V2.60, 18F2450 mpasm 5.31

Any Ideas ?.

[Bruce]

Does the 18F2450 have on-chip EEPROM?

[Bonxy]

Hi Bruce

I think it does, am I reading the datasheet wrong ?, does it not have eeprom ?

[Bruce]

Just downloaded & looked over the datasheet. Doesn't look like this one has on-chip EEPROM so that would explain the error.

[Bonxy]

OMG, I'm a total idiot, I've been looking at the 2455 datasheet all this time

My project is prety scuppered without being able to persist some values on power down, do you know if I could use something else with that processor, maybe peek or pokecode or something ?.

Thanks for your help Bruce

[Bruce]

The easy route would just be to use the 2455, but you could use ERASECODE, WRITECODE and READCODE.

This memory wears out a lot faster than EEPROM, and you have to erase before writes, and deal with different block sizes, etc, but it's do-able.

Melanie posted a nice tutorial here somewhere on this.