unsigned char Counter;
void main(void) 
{
  
  DDRA = 0xFF;  
  DDRB = DDRB | DDRB_BIT4_MASK; 
  DDRT = DDRT & ~DDRT_DDRT7_MASK; 
  Counter = 0;  
  PACTL = 0b01010010; 
  PACN32 = 0xFFF4;  
  PORTB = PORTB & ~PORTB_BIT4_MASK; 
  __asm CLI;
  for(;;) 
  {
  } 
}
interrupt (((0x10000-Vtimpaaovf)/2)-1) void PACA_ISR(void)
{
  PORTB = PORTB | PORTB_BIT4_MASK; 
  PAFLG = PAFLG | PAFLG_PAOVF_MASK; 
  Counter++; 
  PORTA = Counter; 
  PACN32 = 0xFFF4; 
  PORTB = PORTB & ~PORTB_BIT4_MASK; 
}