PIC18F010-ISLASHP datasheet(73/176 Pages) MICROCHIP

73 / 176 page

 2001 Microchip Technology Inc.

Preliminary

DS41142A-page 71

PIC18F010/020

TABLE 9-1:

PORTB FUNCTIONS

TABLE 9-2:

SUMMARY OF REGISTERS ASSOCIATED WITH PORTB

Name

Bit#

Buffer

Function

RB0

bit0

TTL/ST(1)

Input/output port pin (with interrupt-on-change).

Internal software programmable weak pull-up. In-circuit serial

programming data.

RB1

bit1

TTL/ST(1)

Input/output port pin (with interrupt-on-change).

Internal software programmable weak pull-up. In-circuit serial

programming clock.

RB2/T0CKI/

INT0

bit2

TTL/ST(1)

Input/output port pin (with interrupt-on-change) or TMR0 clock input or

Interrupt 0 input. Internal software programmable weak pull-up.

RB3/MCLR/

VPP

bit3

TTL/ST(1)

Input/output (open drain) port pin (with interrupt-on-change) or Master

Clear External Reset input. Internal software programmable

weak pull-up.

RB4/OSC2/

CLKOUT

bit4

TTL/ST(1)

Input/output port pin (with interrupt-on-change) or oscillator connection, or

CLKOUT output. Internal software programmable weak pull-up.

RB5/OSC1/

CLKIN

bit5

TTL/ST(1)

Input/output port pin (with interrupt-on-change) or clock input, or oscillator

connection. Internal software programmable weak pull-up.

Legend:

TTL = TTL input, ST = Schmitt Trigger input

Note 1: This buffer is a Schmitt Trigger input when configured as the external interrupt.

2: This buffer is a Schmitt Trigger input when used in Serial Programming mode.

Name

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

Value on:

POR,

BOR

Value on

all other

RESETS

TRISB

—

RB5

RB4

RB3

RB2

RB1

RB0

--11 1111 --11 1111

PORTB

—

PORTB5 PORTB4

PORTB3

PORTB2 PORTB1

PORTB0 --xx xxxx --uu uuuu

LATB

—

LATB5

LATB4

LATB3

LATB2

LATB1

LATB0

--xx xxxx --uu uuuu

INTCON

GIE/GIEH PEIE/GIEL

T0IE

INT0E

RBIE

T0IF

INT0F

RBIF

0000 000x 0000 000u

INTCON2

RBPU

INTEG0

—

T0IP

—

RBIP

11-- -1-1 11-- -1-1

WPUB

—

WPUB5

WPUB4

WPUB3

WPUB2

WPUB1

WPUB0

--11 1111 --11 1111

IOCB

—

IOCB5

IOCB4

IOCB3

IOCB2

IOCB1

IOCB0

--00 0000 --00 0000

Legend: x = unknown, u = unchanged, - = unimplemented. Shaded cells are not used by PORTB.

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