PIC16F628-20SLASHSS datasheet(43/160 Pages) MICROCHIP

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Preliminary

DS40300B-page 43

PIC16F62X

TABLE 5-3:

PORTB FUNCTIONS

TABLE 5-4:

SUMMARY OF REGISTERS ASSOCIATED WITH PORT

Name

Bit #

Buffer

Type

Function

RB0/INT

bit0

TTL/ST(1)

Bi-directional I/O port/external interrupt. Can be software programmed for

internal weak pull-up.

RB1/RX/DT

bit1

TTL/ST(3)

Bi-directional I/O port/ USART receive pin/synchronous data I/O. Can be

software programmed for internal weak pull-up.

RB2/TX/CK

bit2

TTL/ST(3)

Bi-directional I/O port/ USART transmit pin/synchronous clock I/O. Can be

software programmed for internal weak pull-up.

RB3/CCP1

bit3

TTL/ST(4)

Bi-directional I/O port/Capture/Compare/PWM I/O. Can be software pro-

grammed for internal weak pull-up.

RB4/PGM

bit4

TTL/ST(5)

Bi-directional I/O port/Low voltage programming input pin. Wake-up from

SLEEP on pin change. Can be software programmed for internal weak

pull-up. When low voltage programming is enabled, the interrupt on pin

change and weak pull-up resistor are disabled.

RB5

bit5

TTL

Bi-directional I/O port/Wake-up from SLEEP on pin change. Can be soft-

ware programmed for internal weak pull-up.

RB6/T1OSO/T1CKI

bit6

TTL/ST(2)

Bi-directional I/O port/Timer1 oscillator output/Timer1 clock input. Wake up

from SLEEP on pin change. Can be software programmed for internal weak

pull-up.

RB7/T1OSI

bit7

TTL/ST(2)

Bi-directional I/O port/Timer1 oscillator input. Wake up from SLEEP on pin

change. Can be software programmed for internal weak pull-up.

Legend: ST = Schmitt Trigger, TTL = TTL input

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

Note 2: This buffer is a Schmitt Trigger input when used in serial programming mode.

Note 3: This buffer is a Schmitt Trigger I/O when used in USART/synchronous mode.

Note 4: This buffer is a Schmitt Trigger I/O when used in CCP mode.

Note 5: This buffer is a Schmitt Trigger input when used in low voltage program mode.

Address

Name

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

Value on

POR

Value on

All Other

Resets

06h

PORTB

RB7

RB6

RB5

RB4

RB3

RB2

RB1

RB0

xxxx xxxx

uuuu uuuu

86h

TRISB

TRISB7

TRISB6

TRISB5 TRISB4

TRISB3

TRISB2

TRISB1

TRISB0

1111 1111

81h

OPTION

RBPU

INTEDG

T0CS

T0SE

PSA

PS2

PS1

PS0

1111 1111

Legend:

u = unchanged, x = unknown

Note:

Shaded bits are not used by PORTB.

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