18F1320 ... Strange Memory

[Acetronics2]

YES, I do confirm ... old versions are always thrown to the trash box ...

PbP used version seen in the MPLAB / Output/ Build window too ...

Alain

[Melanie]

Just because I'm a nice girl, I've ordered one... hopefully, I'll have a 18F1320-I/P tomorrow...

[Acetronics2]

Hi, Mel

And you know why I tried to use the 18F1320 ???

Just because 16F648 and 16F88 are not so easy to find by one part ...

This gadget will be published this summer inside THE only FREE model Webzine ( http://aeronews.free.fr/index.html ) ... no money to earn for me .. or so little !!!

.... Funny, I got This from Jeff Schmoyer ...

" If it works well with the 16F88, you might want to stick
to that device. You might also want to compare the
erratas from Microchip on the devices you are using. "

What to think of that ???

Thanks for your Help,

Alain

[mister_e]

That's maybe just another Microchip way of reinvent the wheel.... This may be another specific device who need another special method to write to eeprom and plah plah... BUT how about if you use the assembler method stated in the datasheet AND/OR errata to write to the eeprom?

Could also be another MPASM problem... wich is still possible. Did you contact Microchip tech-Support http://support.microchip.com Usually they answer within 24 hours

Sorry Alain i don't have any handy 18F1320 to test it. I'll order some sample for myself too to play with them when health permit to stay awake more than 1 hour steady.

[Acetronics2]

BUT how about if you use the assembler method stated in the datasheet AND/OR errata to write to the eeprom?

Hi, Steve

I looked at the 2 methods µchips proposes ( Sleep/ Wake on Interrupt or WR polling ) ...
In fact the two methods are based on the WR bit clearing ... so why would one be better than the other !!!

Writing time is given by the hardware ... no way to increase it !!!

PbP uses the polling method, and I don't see anything hazadous in that the GIE bit is firmly set to 0 ... and I never set it to 1 in that program.

Hope you'll soon be on your legs ...

Amitiés from the " Maudit Français"

Alain

[Melanie]

I'm thinking that swapping a $2 part for the most expensive item on the menu at Le Cinq next time I'm in Paris is a good investment *smiles*

[mister_e]

Probably the only thing you'll have for your 2$ is a smile... and again LOL!

[Luciano]

Alain,

What is the manufacturing date code of your 18F1320?

Luciano


Picture from the internet:

[Acetronics2]

Hi,Luciano

I have 05250SE as a code.

I bought them at the end of last year ( 2005 ) from FARNELL.

I've seen the errata giving an increasing EEPROM Writing time from 4 to 5.5 ms ...

may be, MPLAB didn't follow ...

something strange is I have to program it in 4 times ( ! ) to get 100% success

1) Erase all
2) Config words only( Ok only at second pass ...)
3) Program only
4) EEPROM only

setting to "Auto select" fails at each trail ... " Erase all at first" too

Alain