Datasheet

 2010 Microchip Technology Inc. DS39616D-page 117
PIC18F2331/2431/4331/4431
TABLE 11-3: PORTB I/O SUMMARY
Pin Function
TRIS
Setting
I/O
I/O
Type
Description
RB0/PWM0 RB0 0 O DIG LATB<0> data output; not affected by analog input.
1 I TTL PORTB<0> data input; weak pull-up when RBPU
bit is cleared.
Disabled when analog input is enabled.
PWM0 0 O DIG PWM Output 0.
RB1/PWM1 RB1 0 O DIG LATB<1> data output; not affected by analog input.
1 I TTL PORTB<1> data input; weak pull-up when RBPU
bit is cleared.
Disabled when analog input is enabled.
PWM1 0 O DIG PWM Output 1.
RB2/PWM2 RB2 0 O DIG LATB<2> data output; not affected by analog input.
1 I TTL PORTB<2> data input; weak pull-up when RBPU
bit is cleared.
Disabled when analog input is enabled.
PWM2 0 O DIG PWM Output 2.
RB3/PWM3 RB3 0 O DIG LATB<3> data output; not affected by analog input.
1 I TTL PORTB<3> data input; weak pull-up when RBPU
bit is cleared.
Disabled when analog input is enabled.
PWM3 0 O DIG PWM Output 3.
RB4/KBI0/PWM5 RB4 0 O DIG LATB<4> data output; not affected by analog input.
1 I TTL PORTB<4> data input; weak pull-up when RBPU
bit is cleared.
Disabled when analog input is enabled.
KBI0 1 I TTL Interrupt-on-change pin.
PWM5 0 O DIG PWM Output 5.
RB5/KBI1/
PWM4/PGM
RB5 0 O DIG LATB<5> data output.
1 I TTL PORTB<5> data input; weak pull-up when RBPU
bit is cleared.
KBI1 1 I TTL Interrupt-on-change pin.
PWM4
(3)
0 O DIG PWM Output 4; takes priority over port data.
PGM
(2)
x I ST Single-Supply Programming mode entry (ICSP™). Enabled by LVP
Configuration bit; all other pin functions are disabled.
RB6/KBI2/PGC RB6 0 O DIG LATB<6> data output.
1 I TTL PORTB<6> data input; weak pull-up when RBPU
bit is cleared.
KBI2 1 I TTL Interrupt-on-change pin.
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.
1 I TTL PORTB<7> data input; weak pull-up when RBPU
bit is cleared.
KBI3 1 I TTL Interrupt-on-change pin.
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: DIG = Digital level output; TTL = TTL input buffer; ST = Schmitt Trigger input buffer; ANA = Analog level input/output;
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 is enabled.
2: Single-Supply Programming must be enabled.
3: RD5 is the alternate pin for PWM4.