Re: [avr-chat] Multiple IDs in avrdude conf?

[Rick Mann]

On Jan 23, 2012, at 23:28 , Joerg Wunsch wrote:

> Rick Mann <address@hidden> wrote:
> 
>>>> If I don't pass 'atmega644a' to GCC, it won't build properly.
>>> 
>>> Because the ATmega644A is not the same as an ATmega644, but rather an
>>> ATmega644P without `P' (picopower).  ...
> 
>> Interestingly, the signature for my ATmega644A parts is 0x1e9609,
>> same as for the '644 part. The signature for the '644P is 1E 96
>> 0A. So I was going with the '644 definition.
> 
> That's indeed kind of strange.  The ATmega644A has two UARTs (as the
> smaller 324P and 164P always had), while the ATmega644 has only one.
> I think that's the major difference.
> 
> Sure, it's a drop-in replacement nevertheless, but using the same
> device IDs is confusing, for sure.

Agreed.

-- 
Rick