Datasheet

PIC18F2220/2320/4220/4320
DS39599G-page 106 © 2007 Microchip Technology Inc.
TABLE 10-3: PORTB FUNCTIONS
TABLE 10-4: SUMMARY OF REGISTERS ASSOCIATED WITH PORTB
Name Bit# Buffer Function
RB0/AN12/INT0 bit 0 TTL
(1)
/ST
(2)
Input/output pin, analog input or external interrupt input 0.
Internal software programmable weak pull-up.
RB1/AN10/INT1 bit 1 TTL
(1)
/ST
(2)
Input/output pin, analog input or external interrupt input 1.
Internal software programmable weak pull-up.
RB2/AN8/INT2 bit 2 TTL
(1)
/ST
(2)
Input/output pin, analog input or external interrupt input 2.
Internal software programmable weak pull-up.
RB3/AN9/CCP2 bit 3 TTL
(1)
/ST
(3)
Input/output pin or analog input. Capture 2 input/Compare 2 output/
PWM output when CCP2MX Configuration bit is set
(4)
.
Internal software programmable weak pull-up.
RB4/AN11/KBI0 bit 4 TTL Input/output pin (with interrupt-on-change) or analog input.
Internal software programmable weak pull-up.
RB5/KBI1/PGM bit 5 TTL/ST
(5)
Input/output pin (with interrupt-on-change). Internal software
programmable weak pull-up. Low-voltage ICSP™ enable pin.
RB6/KBI2/PGC bit 6 TTL/ST
(5)
Input/output pin (with interrupt-on-change). Internal software
programmable weak pull-up. Serial programming clock.
RB7/KBI3/PGD bit 7 TTL/ST
(5)
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 TTL input when configured as digital I/O.
2: This buffer is a Schmitt Trigger input when configured as the external interrupt.
3: This buffer is a Schmitt Trigger input when configured as the CCP2 input.
4: A device Configuration bit selects which I/O pin the CCP2 pin is multiplexed on.
5: This buffer is a Schmitt Trigger input when used in Serial Programming mode.
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
PORTB RB7 RB6 RB5 RB4 RB3 RB2 RB1 RB0 xxxx xxxx uuuu uuuu
LATB LATB Data Latch Register xxxx xxxx uuuu uuuu
TRISB PORTB Data Direction Register 1111 1111 1111 1111
INTCON
GIE/GIEH PEIE/GIEL TMR0IE INT0IE RBIE TMR0IF INT0IF RBIF 0000 000x 0000 000u
INTCON2 RBPU
INTEDG0 INTEDG1 INTEDG2 — TMR0IP —RBIP1111 -1-1 1111 -1-1
INTCON3 INT2IP INT1IP
— INT2IE INT1IE — INT2IF INT1IF 11-0 0-00 11-0 0-00
ADCON1
— — VCFG1 VCFG0 PCFG3 PCFG2 PCFG1 PCFG0 --00 0000 --00 0000
Legend: x = unknown, u = unchanged, — = unimplemented locations read as ‘0’. Shaded cells are not used by PORTB.