PIC16F7X Datasheet, PDF (36/174 Pages) Microchip Technology – 28/40-Pin 8-Bit CMOS FLASH Microcontrollers

PIC16F7X
TABLE 4-3: PORTB FUNCTIONS
Name
Bit#
Buffer
Function
RB0/INT
RB1
RB2
bit0
TTL/ST⁽¹⁾ Input/output pin or external interrupt input. Internal software
programmable weak pull-up.
bit1
TTL
Input/output pin. Internal software programmable weak pull-up.
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 input
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.
TABLE 4-4: SUMMARY OF REGISTERS ASSOCIATED WITH PORTB
Address
Name
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3 Bit 2 Bit 1 Bit 0
Value on:
POR,
BOR
Value on
all other
RESETS
06h, 106h PORTB
86h, 186h TRISB
RB7
RB6
RB5 RB4 RB3 RB2 RB1 RB0 xxxx xxxx uuuu uuuu
PORTB Data Direction Register
1111 1111 1111 1111
81h, 181h OPTION_REG RBPU INTEDG T0CS T0SE PSA PS2 PS1 PS0 1111 1111 1111 1111
Legend: x = unknown, u = unchanged. Shaded cells are not used by PORTB.
DS30325B-page 34
 2002 Microchip Technology Inc.