PIC18F2450/4450
TABLE 9-3:
PORTB I/O SUMMARY
TRIS
Setting
Pin
Function
I/O
I/O Type
Description
RB0/AN12/
INT0
RB0
0
1
OUT
IN
DIG
TTL
LATB<0> data output; not affected by analog input.
PORTB<0> data input; weak pull-up when RBPU bit is cleared.
(1)
Disabled when analog input enabled.
(1)
AN12
INT0
RB1
1
1
0
1
IN
IN
ANA
ST
A/D input channel 12.
External interrupt 0 input.
RB1/AN10/
INT1
OUT
IN
DIG
TTL
LATB<1> data output; not affected by analog input.
PORTB<1> data input; weak pull-up when RBPU bit is cleared.
Disabled when analog input enabled.
(1)
(1)
AN10
INT1
RB2
1
1
0
1
IN
IN
ANA
ST
A/D input channel 10.
External interrupt 1 input.
RB2/AN8/
INT2/VMO
OUT
IN
DIG
TTL
LATB<2> data output; not affected by analog input.
PORTB<2> data input; weak pull-up when RBPU bit is cleared.
Disabled when analog input enabled.
(1)
(1)
AN8
INT2
VMO
RB3
1
1
0
0
1
IN
IN
ANA
ST
A/D input channel 8.
External interrupt 2 input.
OUT
OUT
IN
DIG
DIG
TTL
External USB transceiver VMO data output.
LATB<3> data output; not affected by analog input.
PORTB<3> data input; weak pull-up when RBPU bit is cleared.
RB3/AN9/VPO
(1)
Disabled when analog input enabled.
(1)
AN9
VPO
RB4
1
0
0
1
IN
OUT
OUT
IN
ANA
DIG
DIG
TTL
A/D input channel 9.
External USB transceiver VPO data output.
RB4/AN11/
KBI0
LATB<4> data output; not affected by analog input.
PORTB<4> data input; weak pull-up when RBPU bit is cleared.
Disabled when analog input enabled.
(1)
(1)
AN11
KBI0
RB5
1
1
0
1
1
x
IN
IN
ANA
TTL
DIG
TTL
TTL
ST
A/D input channel 11.
Interrupt-on-pin change.
RB5/KBI1/
PGM
OUT
IN
LATB<5> data output.
PORTB<5> data input; weak pull-up when RBPU bit is cleared.
Interrupt-on-pin change.
KBI1
PGM
IN
IN
Single-Supply Programming mode entry (ICSP™). Enabled by LVP
Configuration bit; all other pin functions disabled.
RB6/KBI2/
PGC
RB6
0
1
1
x
0
1
1
x
x
OUT
IN
DIG
TTL
TTL
ST
LATB<6> data output.
PORTB<6> data input; weak pull-up when RBPU bit is cleared.
Interrupt-on-pin change.
KBI2
PGC
RB7
IN
(2)
IN
Serial execution (ICSP) clock input for ICSP and ICD operation.
RB7/KBI3/
PGD
OUT
IN
DIG
TTL
TTL
DIG
ST
LATB<7> data output.
PORTB<7> data input; weak pull-up when RBPU bit is cleared.
Interrupt-on-pin change.
KBI3
PGD
IN
(2)
OUT
IN
Serial execution data output for ICSP and ICD operation.
(2)
Serial execution data input for ICSP and ICD operation.
Legend:
OUT = Output, IN = Input, ANA = Analog Signal, DIG = Digital Output, ST = Schmitt Buffer Input,
TTL = TTL Buffer Input, x= Don’t care (TRIS bit does not affect port direction or is overridden for this option)
Note 1: Configuration on POR is determined by PBADEN Configuration bit. Pins are configured as analog inputs when
PBADEN is set and digital inputs when PBADEN is cleared.
2: All other pin functions are disabled when ICSP™ or ICD operation is enabled.
DS39760A-page 102
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