Datasheet
© 2007 Microchip Technology Inc. DS39629C-page 113
PIC18F6390/6490/8390/8490
TABLE 9-3: PORTB FUNCTIONS
Pin Name Function
TRIS
Setting
I/O Buffer Description
RB0/INT0 RB0 0 O DIG LATB<0> data output.
1 I TTL PORTB<0> data input; programmable weak pull-up.
INT0 1 I ST External interrupt 0 input.
RB1/INT1/SEG8 RB1 0 O DIG LATB<1> data output; disabled when LCD segment enabled.
1 I TTL PORTB<1> data input; weak pull-up when RBPU
bit is cleared.
INT1 1 I ST External interrupt 1 input.
SEG8 x O ANA Segment 8 analog output for LCD. Disables digital output.
RB2/INT2/SEG9 RB2 0 O DIG LATB<2> data output; disabled when LCD segment enabled.
1 I TTL PORTB<2> data input; weak pull-up when RBPU
bit is cleared.
INT2 1 I ST External interrupt 2 input.
SEG9 x O ANA Segment 9 analog output for LCD
RB3/INT3/
SEG10
RB3 0 O DIG LATB<3> data output; disabled when LCD segment enabled.
1 I TTL PORTB<3> data input; weak pull-up when RBPU
bit is cleared.
INT3 1 I ST External interrupt 3 input.
SEG10 x O ANA Segment 10 analog output for LCD.
RB4/KBI0/
SEG11
RB4 0 O DIG LATB<4> data output; disabled when LCD segment enabled.
1 I TTL PORTB<4> data input; weak pull-up when RBPU
bit is cleared.
KBI0 1 I TTL Interrupt-on-pin change.
SEG11 x O ANA Segment 11 analog output for LCD.
RB5/KBI1 RB5 0 O DIG LATB<5> data output; disabled when LCD segment enabled.
1 I TTL PORTB<5> data input; weak pull-up when RBPU
bit is cleared.
KBI1 1 I TTL Interrupt-on-pin change.
RB6/KBI2/PGC RB6 0 O DIG LATB<6> data output; unavailable when ICD or ICSP™ enabled.
1 I TTL PORTB<6> data input; unavailable when ICD or ICSP enabled.
KBI2 1 I TTL Interrupt-on-pin change; unavailable when ICD or ICSP enabled.
PGC x I ST Serial execution (ICSP) clock input for ICSP and ICD operation.
(1)
RB7/KBI3/PGD RB7 0 O DIG LATB<7> data output; unavailable when ICD or ICSP enabled.
1 I TTL PORTB<7> data input; unavailable when ICD or ICSP enabled.
KBI3 1 I TTL Interrupt-on-pin change; unavailable when ICD or ICSP enabled.
PGD x O DIG Serial execution data output for ICSP and ICD operation.
(1)
x I ST Serial execution data input for ICSP and ICD operation.
(1)
Legend: O = Output, I = Input, ANA = Analog Signal, DIG = Digital Output, ST = Schmitt Buffer Input, TTL = TTL Buffer Input,
x = Don’t care (TRIS bit does not affect port direction or is overridden for this option).
Note 1: All other pin functions are disabled when ICSP or ICD are enabled.