Information

© 2005 Microchip Technology Inc. DS80239A-page 9
PIC18F2331/2431/4331/4431
PORTB is a bidirectional I/O port. PORTB can be software
programmed for internal weak pull-ups on all inputs.
RB0/PWM0
RB0
PWM0
21 18
I/O
O
TTL
TTL
Digital I/O.
PWM output 0.
RB1/PWM1
RB1
PWM1
22 19
I/O
O
TTL
TTL
Digital I/O.
PWM output 1.
RB2/PWM2
RB2
PWM2
23 20
I/O
O
TTL
TTL
Digital I/O.
PWM output 2.
RB3/PWM3
RB3
PWM3
24 21
I/O
O
TTL
TTL
Digital I/O.
PWM output 3.
RB4/KBI0/PWM5
RB4
KBI0
PWM5
25 22
I/O
I
O
TTL
TTL
TTL
Digital I/O.
Interrupt-on-change pin.
PWM output 5.
RB5/KBI1/PWM4/PGM
RB5
KBI1
PWM4
PGM
26 23
I/O
I
O
I/O
TTL
TTL
TTL
ST
Digital I/O.
Interrupt-on-change pin.
PWM output 4.
Low-Voltage ICSP™ Programming entry pin.
RB6/KBI2/PGC
RB6
KBI2
PGC
27 24
I/O
I
I/O
TTL
TTL
ST
Digital I/O.
Interrupt-on-change pin.
In-Circuit Debugger and ICSP programming clock pin.
RB7/KBI3/PGD
RB7
KBI3
PGD
28 25
I/O
I
I/O
TTL
TTL
ST
Digital I/O.
Interrupt-on-change pin.
In-Circuit Debugger and ICSP programming data pin.
TABLE 1-2: PIC18F2331/2431 PINOUT I/O DESCRIPTIONS (CONTINUED)
Pin Name
Pin
Number
Pin
Type
Buffer
Type
Description
DIP,
SOIC
QFN
Legend: TTL = TTL compatible input CMOS = CMOS compatible input or output
ST = Schmitt Trigger input with CMOS levels I = Input
O = Output P = Power
OD = Open-Drain (no diode to V
DD)