#include <avr\io.h>		
#include <avr\interrupt.h>

ISR(USART_RXC_vect)
{  
 	PORTB = UDR ;
}

int main (void)
{
 	DDRB = 0xFF;				
  	UCSRB = (1<<RXEN)|(1<<RXCIE);	
 	UCSRC = (1<< UCSZ1)|(1<<UCSZ0)|(1<<URSEL);
  	UBRRL = 0x33 ;
  	sei();					

  	while (1);				

  	return 0 ;
}