#include <mc9s12dp512.h>
#define MYBIT PORTB_BIT5 
void main(void)
  {
    unsigned int z;
    DDRB_BIT5 = 1;		
    for(z=0;z<50000;z++)
      {
        MYBIT = 1;
        MYBIT = 0;
      }
    while(1);			
  }