> How can i program the PIC16F84 to delay for 1 sec before make a RA
> output equal to 1?
> With best regards
> gkranis@usa.net

George, there are two ways to do timedelays - using RTCC or program delay.
1) You mau set RTCC and it's pre-scaller to make 1 sec timer period. and
then explore RTCC value or use RTCC interrupt. With 1st method your program
will be like that:
         bsf        PORTA,0              ;  set RA0=1
         call    RTCC_START     ;  start timer
         call    WAIT_RTCC           ; wait for the end of the timer period
         bcf    PORTA,0               ;  set RA0=0
;
 With 2nd -
         call    SET_RTCC_Interrupt_parametr
         bsf     PORTA,0    ; set RA0=1
         bsf     STATUS,GIE  ; enable interrupt  // suppose that RTCC
interrupt was enabled before
        ....... do something ......

 Interrupt subroutine:
        bcf   PORTA,0    ; set RA0=0
       clear interrupt flag end exit.

2) Programming delay
         bsf PORTA,0   ; set RA0=1
         call WAIT_1S  ; time delay
         bcf PORTA,0  ; set RA0=0
         .......

 WAIT_1S   movlw  C1  ; 1st constant
                     movwf  loop1
WAIT_1S_  movlw  C2 ; 2nd constant
                     movwf  loop2
                     decfsz  loop2,f
                     goto $-1
                     decfsz loop1,f
                     goto    WAIT_1S_
                     return

 Your constants (C1 & C2) depends of PIC clock frequency.

Alex Torres, Kharkov, Ukraine (exUSSR)
altor@chat.ru
2:461/28@FidoNet
http://www.geocities.com/SiliconValley/Lab/6311