PIC18F2450/4450
TABLE 1-2:
PIC18F2450 PINOUT I/O DESCRIPTIONS (CONTINUED)
Pin Number
Pin Buffer
Type Type
Pin Name
Description
PDIP,
QFN
SOIC
PORTB is a bidirectional I/O port. PORTB can be software
programmed for internal weak pull-ups on all inputs.
RB0/AN12/INT0
RB0
21
22
23
18
19
20
I/O
I
I
TTL
Analog
ST
Digital I/O.
Analog input 12.
External interrupt 0.
AN12
INT0
RB1/AN10/INT1
RB1
I/O
I
I
TTL
Analog
ST
Digital I/O.
Analog input 10.
External interrupt 1.
AN10
INT1
RB2/AN8/INT2/VMO
RB2
AN8
INT2
VMO
I/O
I
I
TTL
Analog
ST
Digital I/O.
Analog input 8.
External interrupt 2.
External USB transceiver VMO output.
O
—
RB3/AN9/VPO
RB3
24
25
26
27
28
21
22
23
24
25
I/O
I
O
TTL
Analog
—
Digital I/O.
Analog input 9.
External USB transceiver VPO output.
AN9
VPO
RB4/AN11/KBI0
RB4
I/O
I
I
TTL
Analog
TTL
Digital I/O.
Analog input 11.
Interrupt-on-change pin.
AN11
KBI0
RB5/KBI1/PGM
RB5
I/O
I
I/O
TTL
TTL
ST
Digital I/O.
Interrupt-on-change pin.
Low-Voltage ICSP™ Programming enable pin.
KBI1
PGM
RB6/KBI2/PGC
RB6
I/O
I
I/O
TTL
TTL
ST
Digital I/O.
Interrupt-on-change pin.
In-Circuit Debugger and ICSP programming clock pin.
KBI2
PGC
RB7/KBI3/PGD
RB7
I/O
I
I/O
TTL
TTL
ST
Digital I/O.
Interrupt-on-change pin.
In-Circuit Debugger and ICSP programming data pin.
KBI3
PGD
Legend: TTL = TTL compatible input
ST = Schmitt Trigger input with CMOS levels
= Output
CMOS = CMOS compatible input or output
I
= Input
O
P
= Power
DS39760A-page 14
Advance Information
© 2006 Microchip Technology Inc.
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