
PIC18FXX8
DS41159E-page 12
2006 Microchip Technology Inc.
PORTB is a bidirectional I/O port.
PORTB can be software
programmed for internal weak
pull-ups on all inputs.
RB0/INT0
RB0
INT0
21
33
8
36
I/O
I
TTL
ST
Digital I/O.
External interrupt 0.
RB1/INT1
RB1
INT1
22
34
9
37
I/O
I
TTL
ST
Digital I/O.
External interrupt 1.
RB2/CANTX/INT2
RB2
CANTX
INT2
23
35
10
38
I/O
O
I
TTL
ST
Digital I/O.
Transmit signal for CAN bus.
External interrupt 2.
RB3/CANRX
RB3
CANRX
24
36
11
39
I/O
I
TTL
Digital I/O.
Receive signal for CAN bus.
RB4
25
371441
I/O
TTL
Digital I/O.
Interrupt-on-change pin.
RB5/PGM
RB5
PGM
26
38
15
42
I/O
I
TTL
ST
Digital I/O.
Interrupt-on-change pin.
Low-voltage ICSP
programming enable.
RB6/PGC
RB6
PGC
27
39
16
43
I/O
I
TTL
ST
Digital I/O. In-Circuit
Debugger pin.
Interrupt-on-change pin.
ICSP programming clock.
RB7/PGD
RB7
PGD
28
40
17
44
I/O
TTL
ST
Digital I/O. In-Circuit
Debugger pin.
Interrupt-on-change pin.
ICSP programming data.
TABLE 1-2:
PIC18FXX8 PINOUT I/O DESCRIPTIONS (CONTINUED)
Pin Name
Pin Number
Pin
Type
Buffer
Type
Description
PIC18F248/258
PIC18F448/458
SPDIP, SOIC
PDIP
TQFP
PLCC
Legend: TTL = TTL compatible input
CMOS = CMOS compatible input or output
ST
= Schmitt Trigger input with CMOS levels
Analog = Analog input
I
= Input
O
= Output
P
= Power
OD
= Open-Drain (no P diode to VDD)