Datasheet

PIC16F84A
DS35007C-page 18  2001-2013 Microchip Technology Inc.
TABLE 4-3: PORTB FUNCTIONS
TABLE 4-4: SUMMARY OF REGISTERS ASSOCIATED WITH PORTB
Name Bit Buffer Type I/O Consistency Function
RB0/INT bit0 TTL/ST
(1)
Input/output pin or external interrupt input.
Internal software programmable weak pull-up.
RB1 bit1 TTL Input/output pin. Internal software programmable weak pull-up.
RB2 bit2 TTL Input/output pin. Internal software programmable weak pull-up.
RB3 bit3 TTL Input/output pin. Internal software programmable weak pull-up.
RB4 bit4 TTL Input/output pin (with interrupt-on-change).
Internal software programmable weak pull-up.
RB5 bit5 TTL Input/output pin (with interrupt-on-change).
Internal software programmable weak pull-up.
RB6 bit6 TTL/ST
(2)
Input/output pin (with interrupt-on-change).
Internal software programmable weak pull-up. Serial programming clock.
RB7 bit7 TTL/ST
(2)
Input/output pin (with interrupt-on-change).
Internal software programmable weak pull-up. Serial programming data.
Legend: TTL = TTL input, ST = Schmitt Trigger.
Note 1: This buffer is a Schmitt Trigger input when configured as the external interrupt.
2: This buffer is a Schmitt Trigger input when used in Serial Programming mode.
Address Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
Value on
Power-on
Reset
Value on
all other
RESETS
06h PORTB RB7 RB6 RB5 RB4 RB3 RB2 RB1 RB0/INT xxxx xxxx uuuu uuuu
86h TRISB TRISB7 TRISB6 TRISB5 TRISB4 TRISB3 TRISB2 TRISB1 TRISB0 1111 1111 1111 1111
81h OPTION_REG RBPU
INTEDG T0CS T0SE PSA PS2 PS1 PS0 1111 1111 1111 1111
0Bh,8Bh INTCON GIE
EEIE T0IE INTE RBIE T0IF INTF RBIF 0000 000x 0000 000u
Legend: x = unknown, u = unchanged. Shaded cells are not used by PORTB.