. PIC16F84A 14 -. 14 . 1 (1024) .
MCLR (Master Clear) PC, MCLR 000h. , .
. () PIC16F84A 8- , Microchip . . 12 (), (). , , .
PIC16F84A , 0 1. . 5- RP0 STATUS. 0 0, 1 1. 0. . , 68, . 0.
:
STATUS , ;
OPTION_REG (), , , (pull-up) ;
INTCON .
/. PIC16F84A 13 (), ( ) . 1 . , PORT; , TRIS; OBF; IBF. OBF IBF . EN. EN = 1 1 0 . EN = 0 Z-. OBF TRIS. 0, EN OBF . , PORT (0 1), . TRIS 1, EN 0, OBF Z-, .. . IBF, . IBF . IBF Z- . , TRIS 0, 1.
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: (RA0-RA4) (RB0-RB7). ( ) TRISA TRISB. . . : RB0-RB3 , RB4-RB7 :
movlw b11110000; W 11110000
movwf TRISB; W TRISB
. , RB0 RB4-RB7 . RA4 TMR0. , , 50 . .
1.