Datasheet

PIC18F2450/4450
DS39760D-page 14 © 2008 Microchip Technology Inc.
PORTB is a bidirectional I/O port. PORTB can be software
programmed for internal weak pull-ups on all inputs.
RB0/AN12/INT0
RB0
AN12
INT0
21 18
I/O
I
I
TTL
Analog
ST
Digital I/O.
Analog input 12.
External interrupt 0.
RB1/AN10/INT1
RB1
AN10
INT1
22 19
I/O
I
I
TTL
Analog
ST
Digital I/O.
Analog input 10.
External interrupt 1.
RB2/AN8/INT2/VMO
RB2
AN8
INT2
VMO
23 20
I/O
I
I
O
TTL
Analog
ST
—
Digital I/O.
Analog input 8.
External interrupt 2.
External USB transceiver VMO output.
RB3/AN9/VPO
RB3
AN9
VPO
24 21
I/O
I
O
TTL
Analog
—
Digital I/O.
Analog input 9.
External USB transceiver VPO output.
RB4/AN11/KBI0
RB4
AN11
KBI0
25 22
I/O
I
I
TTL
Analog
TTL
Digital I/O.
Analog input 11.
Interrupt-on-change pin.
RB5/KBI1/PGM
RB5
KBI1
PGM
26 23
I/O
I
I/O
TTL
TTL
ST
Digital I/O.
Interrupt-on-change pin.
Low-Voltage ICSP™ Programming enable 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: PIC18F2450 PINOUT I/O DESCRIPTIONS (CONTINUED)
Pin Name
Pin Number
Pin
Type
Buffer
Type
Description
SPDIP,
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