Datasheet

PIC16C77X
 1999-2013 Microchip Technology Inc. Advance Information DS30275B-page 31
TABLE 3-3 PORTB FUNCTIONS
TABLE 3-4 SUMMARY OF REGISTERS ASSOCIATED WITH PORTB
Name Bit# Buffer Function
RB0/INT bit0 TTL/ST
(1)
Input/output pin or external interrupt input. Internal software
programmable weak pull-up.
RB1/SS
bit1
TTL/ST
(3)
Input/output pin or SSP slave select. Internal software programmable
weak pull-up.
RB2/AN8 bit2 TTL Input/output pin or analog input8. Internal software programmable
weak pull-up.
RB3/AN9/LVDIN bit3 TTL Input/output pin or analog input9 or Low-voltage detect input. 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.
3: This buffer is a Schmitt Trigger input when used as the SSP slave select.
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 RB7 RB6 RB5 RB4 RB3 RB2 RB1 RB0 xxxx 11xx uuuu 11uu
86h, 186h TRISB PORTB Data Direction Register 1111 1111 1111 1111
81h, 181h OPTION_REG RBPU
INTEDG T0CS T0SE PSA PS2 PS1 PS0 1111 1111 1111 1111
9Fh ADCON1
ADFM VCFG2 VCFG1 VCFG0 PCFG3 PCFG2 PCFG1 PCFG0 0000 0000 0000 0000
Legend: x = unknown, u = unchanged. Shaded cells are not used by PORTB.
774.book Page 31 Tuesday, January 29, 2013 12:02 PM