PIC16F688-I/ST View Datasheet(PDF) - Microchip Technology

Part Name

Description

Manufacturer

PIC16F688-I/ST

14-Pin Flash-Based, 8-Bit CMOS Microcontrollers with nanoWatt Technology

Microchip Technology 

PIC16F688

4.2.5.6 RA5/T1CKI/OSC1/CLKIN

Figure 4-6 shows the diagram for this pin. The RA5 pin

is configurable to function as one of the following:

• a general purpose I/O

• a Timer1 clock input

• a crystal/resonator connection

• a clock input

FIGURE 4-6:

Data Bus

DQ

WR

WPUA

CK Q

RD

WPUA

WR

PORTA

DQ

CK Q

BLOCK DIAGRAM OF RA5

INTOSC

Mode

TMR1LPEN(1)

VDD

Weak

RAPU

Oscillator

Circuit

OSC2

VDD

WR

TRISA

DQ

CK Q

RD

TRISA

INTOSC

Mode

I/O pin

VSS

RD

PORTA

DQ

WR

IOCA

CK Q

RD

IOCA

(2)

QD

EN

Q3

QD

EN

Interrupt-on-

change

RD PORTA

To Timer1 or CLKGEN

Note 1: Timer1 LP oscillator enabled.

2: When using Timer1 with LP oscillator, the

Schmitt Trigger is bypassed.

DS41203C-page 40

© 2007 Microchip Technology Inc.

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