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PIC12F683 Data Sheet - Microchip

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<strong>PIC12F683</strong><br />

4.2.5.4 GP3/MCLR/VPP<br />

Figure 4-4 shows the diagram for this pin. The GP3 pin<br />

is configurable to function as one of the following:<br />

• a general purpose input<br />

• as Master Clear Reset with weak pull-up<br />

FIGURE 4-4:<br />

BLOCK DIAGRAM OF GP3<br />

VDD<br />

4.2.5.5 GP4/AN3/T1G/OSC2/CLKOUT<br />

Figure 4-5 shows the diagram for this pin. The GP4 pin<br />

is configurable to function as one of the following:<br />

• a general purpose I/O<br />

• an analog input for the ADC<br />

• a Timer1 gate input<br />

• a crystal/resonator connection<br />

• a clock output<br />

MCLRE<br />

Weak<br />

FIGURE 4-5:<br />

BLOCK DIAGRAM OF GP4<br />

<strong>Data</strong><br />

Bus<br />

RD<br />

TRISIO<br />

RD<br />

GPIO<br />

Reset<br />

VSS<br />

MCLRE<br />

MCLRE<br />

VSS<br />

Input<br />

pin<br />

<strong>Data</strong><br />

Bus<br />

WR<br />

WPU<br />

D<br />

CK<br />

Q<br />

Q<br />

Analog<br />

Input Mode<br />

CLK (1)<br />

Modes<br />

VDD<br />

Weak<br />

WR<br />

IOC<br />

RD<br />

IOC<br />

D<br />

Interrupt-onchange<br />

CK<br />

Q<br />

Q<br />

Q D<br />

EN<br />

Q D<br />

EN<br />

RD GPIO<br />

Q3<br />

RD<br />

WPU<br />

WR<br />

GPIO<br />

WR<br />

TRISIO<br />

RD<br />

TRISIO<br />

RD<br />

GPIO<br />

D<br />

CK<br />

D<br />

CK<br />

Q<br />

Q<br />

Q<br />

Q<br />

OSC1<br />

FOSC/4<br />

GPPU<br />

Oscillator<br />

Circuit<br />

CLKOUT<br />

Enable<br />

1<br />

0<br />

CLKOUT<br />

Enable<br />

INTOSC/<br />

RC/EC (2)<br />

CLKOUT<br />

Enable<br />

Analog<br />

Input Mode<br />

VDD<br />

I/O pin<br />

VSS<br />

D<br />

Q<br />

WR<br />

IOC<br />

RD<br />

IOC<br />

CK<br />

Q<br />

Q<br />

Q<br />

D<br />

EN<br />

D<br />

Q3<br />

Interrupt-onchange<br />

To T1G<br />

To A/D Converter<br />

EN<br />

RD GPIO<br />

Note 1: CLK modes are XT, HS, LP, optional LP oscillator and<br />

CLKOUT Enable.<br />

2: With CLKOUT option.<br />

DS41211D-page 38<br />

© 2007 <strong>Microchip</strong> Technology Inc.

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