Thanks for the hint; I supposed that something like this memory mapping
existed  by seeing they wrote to memory in things like FLIP. I check these
things out. Thanks again.

2007/7/10, Michael Schippling <[EMAIL PROTECTED]>:

Speaking for ATMEGA and T1 (probably the same in T2) the basic pin,
port, and register definitions are in:
        /usr/local/avr/include/avr/iom128.h
And as just recently mentioned here, the control registers are
memory mapped so writing to them makes things happen directly.
Search out a copy of the ATMEGA128 manual for TooMuchInformation
about what each bit does.

MS


Bernardo Avila Pires wrote:
>
>   Hi! Can you help me, please? Where do I find the declarations of DDRA,
> PORTA, PINA, etc ? It seems to me that the bit values are written to
> memory and I suppose the CPU reads from them. Is that so? Is there such
> information in the ATMega docs?
>   Thank you very much.
>
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