PIC16F72SLASHML datasheet(26/136 Pages) MICROCHIP

26 / 136 page

PIC16F72

DS39597B-page 24

 2002 Microchip Technology Inc.

TABLE 3-3:

PORTB FUNCTIONS

TABLE 3-4:

SUMMARY OF REGISTERS ASSOCIATED WITH PORTB

Name

Bit#

Buffer

Function

RB0/INT

bit 0

TTL/ST(1)

Input/output pin or external interrupt input. Internal software

programmable weak pull-up.

RB1

bit 1

TTL

Input/output pin. Internal software programmable weak pull-up.

RB2

bit 2

TTL

Input/output pin. Internal software programmable weak pull-up.

RB3

bit 3

TTL

Input/output pin. Internal software programmable weak pull-up.

RB4

bit 4

TTL

Input/output pin (with interrupt-on-change). Internal software programmable

weak pull-up.

RB5

bit 5

TTL

Input/output pin (with interrupt-on-change). Internal software programmable

weak pull-up.

RB6

bit 6

TTL/ST(2)

Input/output pin (with interrupt-on-change). Internal software programmable

weak pull-up. Serial programming clock.

RB7

bit 7

TTL/ST(2)

Input/output pin (with interrupt-on-change). Internal software programmable

weak pull-up. Serial programming data.

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.

Address

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

06h, 106h

PORTB

RB7

RB6

RB5

RB4

RB3

RB2

RB1

RB0

xxxx xxxx

uuuu uuuu

86h, 186h

TRISB

PORTB Data Direction Register

1111 1111

81h, 181h

OPTION

RBPU

INTEDG

T0CS

T0SE

PSA

PS2

PS1

PS0

1111 1111

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

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