#include <stdio.h>
void main()
{
int x = 0x12345678;
char *tabla = (char*)&x;
printf("0x%X\r\n", tabla[0]);
printf("0x%X\r\n", tabla[1]);
printf("0x%X\r\n", tabla[2]);
printf("0x%X\r\n", tabla[3]);
}