#include <avr/io.h>    		

int main(void) 
{	
    unsigned char x, y;
    unsigned char mybyte = 0x29;

	DDRB = DDRC = 0xFF;		
    x = mybyte & 0x0F;		
    PORTB = x | 0x30;		
    y = mybyte & 0xF0;		
    y = y >> 4;  			
    PORTC = y | 0x30;		

	return 0;
}