PIC18F2331/2431/4331/4431
TABLE 11-3: PORTB I/O SUMMARY
TRIS
Setting
I/O
Pin
Function
I/O
Description
Type
RB0/PWM0
RB0
0
1
O
I
DIG
TTL
LATB<0> data output; not affected by analog input.
PORTB<0> data input; weak pull-up when RBPU bit is cleared.
Disabled when analog input is enabled.
PWM0
RB1
0
0
1
O
O
I
DIG
DIG
TTL
PWM Output 0.
RB1/PWM1
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 is enabled.
PWM1
RB2
0
0
1
O
O
I
DIG
DIG
TTL
PWM Output 1.
RB2/PWM2
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 is enabled.
PWM2
RB3
0
0
1
O
O
I
DIG
DIG
TTL
PWM Output 2.
RB3/PWM3
LATB<3> data output; not affected by analog input.
PORTB<3> data input; weak pull-up when RBPU bit is cleared.
Disabled when analog input is enabled.
PWM3
RB4
0
0
1
O
O
I
DIG
DIG
TTL
PWM Output 3.
RB4/KBI0/PWM5
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 is enabled.
KBI0
PWM5
RB5
1
0
0
1
1
0
x
I
O
O
I
TTL
DIG
DIG
TTL
TTL
DIG
ST
Interrupt-on-change pin.
PWM Output 5.
RB5/KBI1/
PWM4/PGM
LATB<5> data output.
PORTB<5> data input; weak pull-up when RBPU bit is cleared.
Interrupt-on-change pin.
KBI1
I
(3)
PWM4
O
I
PWM Output 4; takes priority over port data.
(2)
PGM
Single-Supply Programming mode entry (ICSP™). Enabled by LVP
Configuration bit; all other pin functions are disabled.
RB6/KBI2/PGC
RB7/KBI3/PGD
RB6
0
1
1
x
0
1
1
x
x
O
I
DIG
TTL
TTL
ST
LATB<6> data output.
PORTB<6> data input; weak pull-up when RBPU bit is cleared.
Interrupt-on-change pin.
KBI2
PGC
RB7
I
(1)
I
Serial execution (ICSP™) clock input for ICSP and ICD operation.
LATB<7> data output.
O
I
DIG
TTL
TTL
DIG
ST
PORTB<7> data input; weak pull-up when RBPU bit is cleared.
Interrupt-on-change pin.
KBI3
PGD
I
(1)
O
I
Serial execution data output for ICSP and ICD operation.
(1)
Serial execution data input for ICSP and ICD operation.
Legend:
DIG = Digital level output; TTL = TTL input buffer; ST = Schmitt Trigger input buffer; ANA = Analog level input/output;
x= Don’t care (TRIS bit does not affect port direction or is overridden for this option).
Note 1: All other pin functions are disabled when ICSP or ICD is enabled.
2: Single-Supply Programming must be enabled.
3: RD5 is the alternate pin for PWM4.
2010 Microchip Technology Inc.
DS39616D-page 117
MICROCHIP [ MICROCHIP ]
