
2009 Microchip Technology Inc.
DS39887C-page 13
PIC18F2458/2553/4458/4553
PORTB is a bidirectional I/O port. PORTB can be software
programmed for internal weak pull-ups on all inputs.
RB0/AN12/INT0/FLT0/
SDI/SDA
RB0
AN12
INT0
FLT0
SDI
SDA
21
I/O
I
I/O
TTL
Analog
ST
Digital I/O.
Analog input 12.
External interrupt 0.
PWM Fault input (CCP1 module).
SPI data in.
I2C data I/O.
RB1/AN10/INT1/SCK/
SCL
RB1
AN10
INT1
SCK
SCL
22
I/O
I
I/O
TTL
Analog
ST
Digital I/O.
Analog input 10.
External interrupt 1.
Synchronous serial clock input/output for SPI mode.
Synchronous serial clock input/output for I2C mode.
RB2/AN8/INT2/VMO
RB2
AN8
INT2
VMO
23
I/O
I
O
TTL
Analog
ST
—
Digital I/O.
Analog input 8.
External interrupt 2.
External USB transceiver VMO output.
RB3/AN9/CCP2/VPO
RB3
AN9
CCP2(1)
VPO
24
I/O
I
I/O
O
TTL
Analog
ST
—
Digital I/O.
Analog input 9.
Capture 2 input/Compare 2 output/PWM 2 output.
External USB transceiver VPO output.
RB4/AN11/KBI0
RB4
AN11
KBI0
25
I/O
I
TTL
Analog
TTL
Digital I/O.
Analog input 11.
Interrupt-on-change pin.
RB5/KBI1/PGM
RB5
KBI1
PGM
26
I/O
I
I/O
TTL
ST
Digital I/O.
Interrupt-on-change pin.
Low-Voltage ICSP Programming enable pin.
RB6/KBI2/PGC
RB6
KBI2
PGC
27
I/O
I
I/O
TTL
ST
Digital I/O.
Interrupt-on-change pin.
In-Circuit Debugger and ICSP programming clock pin.
RB7/KBI3/PGD
RB7
KBI3
PGD
28
I/O
I
I/O
TTL
ST
Digital I/O.
Interrupt-on-change pin.
In-Circuit Debugger and ICSP programming data pin.
TABLE 1-2:
PIC18F2458/2553 PINOUT I/O DESCRIPTIONS (CONTINUED)
Pin Name
Pin
Number Pin
Type
Buffer
Type
Description
SPDIP,
SOIC
Legend: TTL = TTL compatible input
CMOS = CMOS compatible input or output
ST = Schmitt Trigger input with CMOS levels
I
= Input
O
= Output
P
= Power
Note 1:
Alternate assignment for CCP2 when CCP2MX Configuration bit is cleared.
2:
Default assignment for CCP2 when CCP2MX Configuration bit is set.