Projéto de um semáforo com o pic16f628A

 
 @ DEVICE pic16F628A
 @ DEVICE pic16F628A, WDT_OFF
 @ DEVICE pic16F628A, PWRT_OFF
 @ DEVICE pic16F628A, BOD_OFF
 @ DEVICE pic16F628A, PROTECT_OFF
 @ DEVICE pic16F628A, MCLR_OFF
 @ DEVICE pic16F628A, INTRC_OSC_NOCLKOUT
 TRISB=0   
PROG:
   PROTB=%100001
   PAUSE 9000
   PORTB=%100010
   PAUSE 3000
   PORTB=1100
   PAUSE 9000
   PORTB=%010100
   PAUSE 3000
GOTO  PROG
END