Yahoo Groups archive

AVR-Chat

Index last updated: 2026-04-28 22:41 UTC

Message

RE: [AVR-Chat] Need confirmation on ATMega upgrade path

2012-01-30 by Chuck Hackett

> From: Clark Martin
> ....
> I hit the wall using the ATMega 32 (on a model railroading project), went
> looking and chose the ATMEga1284P.  Software and hardware wise it was a
> drop in replacement.  The only thing I had to do to use the new chip was
> change the settings in my make file.

Thanks Clark, that's what I needed to know from someone who's "been there"
...

> The 1284 has more RAM, Flash and EEPROM and it has an additional timer
> and serial port.  In that project I did make use of the additional timer
but
> not the serial port.

I doubt if I could use the extra serial port because I'm using almost all 44
pins now (and the PCBs already produced).

The additional timer may come in handy though.

> I don't know if the 1284 you are looking at is pin compatible with the 32
you
> are using but I suspect it is.

I brought up the PDFs side by side and they appear to have compatible
pinouts unless I missed something.

Thanks for the feedback ...
 
Cheers,

Chuck Hackett
"Good judgment comes from experience, experience comes from bad judgment"
7.5" gauge Union Pacific Northern (4-8-4) 844
http://www.whitetrout.net/Chuck

Attachments

Move to quarantaine

This moves the raw source file on disk only. The archive index is not changed automatically, so you still need to run a manual refresh afterward.