LIST		P=16F84A
	INCLUDE		<P16F84A.INC>
	__CONFIG	_CP_OFF &  _WDT_OFF & _PWRTE_ON & _XT_OSC

	CBLOCK  0x0C
   CONTADOR
	ENDC
	
#DEFINE  SPK	PORTB,0


	ORG	0
Inicio

	bsf		STATUS,RP0				; Acceso al Banco 1.
	bcf		SPK						
	bcf		STATUS,RP0				; Acceso al Banco 0.

Principal

	bsf		SPK
					               			
     call	Retardo_500micros 
     call	Retardo_500micros                            

	bcf		SPK					

     call	Retardo_500micros
     call	Retardo_500micros 

     goto escero
espera_1seg  
              movlw     0xff               
              movwf     CONTADOR  
      
                                       
  escero           decfsz	CONTADOR,1	
  
             goto     Principal

             goto    SPKOFF
  
SPKOFF    bcf	SPK

             goto SPKOFF
              
	INCLUDE  <RETARDOS.INC>	

	END