PIC16C712 datasheet(27/106 Pages) MICROCHIP

27 / 106 page

 1999-2013 Microchip Technology Inc.

DS41106C-page 27

PIC16C712/716

FIGURE 3-7:

BLOCK DIAGRAM OF RB7:RB4 PINS

TABLE 3-3:

PORTB FUNCTIONS

Data Latch

From other

RBPU(1)

VDD

I/O

DATA BUS

WR PORT

WR TRIS

Set RBIF

TRIS Latch

RD TRIS

RD PORT

RB7:RB4 pins

weak

pull-up

RD PORT

Latch

TTL

Buffer

RB7:RB6 in Serial Programming mode

Note 1: To enable weak pull-ups, set the appropriate TRIS bit(s) and clear the RBPU bit (OPTION_REG<7>).

VSS

VDD

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/T1OS0/

T1CKI

bit 1

TTL/ST(1)

Input/output pin or Timer1 oscillator output, or Timer1 clock input. Internal

software programmable weak pull-up. See Timer1 section for detailed

operation.

RB2/T1OSI

bit 2

TTL/ST(1)

Input/output pin or Timer1 oscillator input. Internal software programmable

weak pull-up. See Timer1 section for detailed operation.

RB3/CCP1

bit 3

TTL/ST(1)

Input/output pin or Capture 1 input, or Compare 1 output, or PWM1 output.

Internal software programmable weak pull-up. See CCP1 section for

detailed operation.

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 or peripheral input.

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

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