PIC16F1939-I/PT【PDF 23/92 页】IC MCU 8BIT FLASH 44TQFP

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Sheet目录3872

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2009 Microchip Technology Inc.

DS39637D-page 139

PIC18F2480/2580/4480/4580

TABLE 11-3:

PORTB I/O SUMMARY

Pin Name

Function

I/O

TRIS

Buffer

Description

RB0/INT0/FLT0/AN10

RB0

OUT

DIG

LATB<0> data output.

TTL

PORTB<0> data input. Weak pull-up available only in this mode.

INT0

External Interrupt 0 input.

FLT0(1)

Enhanced PWM Fault input.

AN10

ANA

A/D Input Channel 10. Enabled on POR, this analog input overrides

the digital input (read as clear – low level).

RB1/INT1/AN8

RB1

OUT

DIG

LATB<1> data output.

TTL

PORTB<1> data input. Weak pull-up available only in this mode.

INT1

External Interrupt 1 input.

AN8

ANA

A/D Input Channel 8. Enabled on POR; this analog input overrides

the digital input (read as clear – low level).

RB2/INT2/CANTX

RB2

OUT

DIG

LATB<2> data output.

TTL

PORTB<2> data input. Weak pull-up available only in this mode.

INT2

External Interrupt 2 input.

CANTX

OUT

DIG

CAN transmit signal output. The CAN interface overrides the

TRIS<2> control when enabled.

RB3/CANRX

RB3

OUT

DIG

LATB<3> data output.

TTL

PORTB<3> data input. Weak pull-up available only in this mode.

CANRX

CAN receive signal input. Pin must be configured as a digital input by

setting TRISB<3>.

RB4/KBI0/AN9

RB4

OUT

DIG

LATB<4> data output.

TTL

PORTB<4> data input. Weak pull-up available only in this mode.

KBI0

TTL

Interrupt-on-pin change.

AN9

ANA

A/D Input Channel 9. Enabled on POR; this analog input overrides

the digital input (read as clear – low level).

RB5/KBI1/PGM

RB5

OUT

DIG

LATB<5> data output.

TTL

PORTB<5> data input. Weak pull-up available only in this mode.

KBI1

TTL

Interrupt-on-pin change.

PGM

Low-Voltage Programming mode entry (ICSP). Enabling this

function overrides digital output.

RB6/KBI2/PGC

RB6

OUT

DIG

LATB<6> data output.

TTL

PORTB<6> data input. Weak pull-up available only in this mode.

KBI2

TTL

Interrupt-on-pin change.

PGC

Low-Voltage Programming mode entry (ICSP) clock input.

RB7/KBI3/PGD

RB7

OUT

DIG

LATB<7> data output.

TTL

PORTB<7> data input. Weak pull-up available only in this mode.

KBI3

TTL

Interrupt-on-pin change.

PGD

OUT

DIG

Low-Voltage Programming mode entry (ICSP) clock output.

Low-Voltage Programming mode entry (ICSP) clock input.

Legend:

OUT = Output, IN = Input, ANA = Analog Signal, DIG = Digital Output, ST = Schmitt Buffer Input, TTL = TTL Buffer Input

Note 1:

Available on 40/44-pin devices only.

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