Hi Ali,

> The question is: Is it possible to reconfigure somehow pin assignation  
> in order to use hardware USI module with my pin assignation? I never  
> used micros from ATMEL before so any suggest highly appreciable.

No, if you plan to use the hardware TWI module (i2c), the pin
assignation is fixed. In my opinion, the 2 solutions are:
  - Modify the pcb to invert the 2 pins
  - If it's really impossible, implement a software i2c, which is
    not a simple task.

By the way, there's an i2c module in aversive:
http://cvsweb.droids-corp.org/cgi-bin/viewcvs.cgi/aversive/modules/comm/i2c/

Olivier

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