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PIC16F676 – 8 bit Microcontroller

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PIC16F676 is microcontroller from ‘PIC16F’ family and is made by MICROCHIP TECHNOLOGY. It is an 8-Bit CMOS Microcontroller and is very popular among hobbyists and engineers due its features, cost and small size.

 

Pin configuration

PIC16F676 is a 14 pin device and many of them can perform multiple functions as shown in above pin diagram. The description for each of these functions is given below.

Pin

Function

Description

1

VDD

Positive Power Supply

2

RA5/T1CKI/OSC1/CLKIN

RA5: Pin5 of  Port A

T1CKI: Timer1 external clock input

OSC1:Oscillator pin 1

CLKI: External clock source input

3

RA4/T1G/OSC2/AN3/CLKOUT

RA4: Pin4 of  Port A

T1G: Timer1 gate

OSC2: Oscillator pin 2

AN3: Analog input 3

CLKO: Clock source output

4

RA3/MCLR/VPP

RA3: Pin3 of  Port A

MCLR: Master Clear Input or Reset pin

VPP: Programming voltage

5

RC5

RC5: Pin5 of  Port C

6

RC4

RC4: Pin4 of  Port C

7

RC3/AN7

RC3: Pin3 of  Port C

AN7: Analog input 7

8

RC2/AN6

RC2: Pin of  Port C2

AN6: Analog input6

9

RC1/AN5

RC1: Pin of  Port C1

AN5: Analog input5

10

RC0/AN4

RC0: Pin of  Port C0

AN4: Analog input4

11

RA2/AN2/COUT/T0CKI/INT

RA2: Pin2 of  Port A

AN2: Analog input2

COUT: Comparator output

T0CKI: Timer0 clock input

INT: External Interrupt

12

RA1/AN1/CIN-/VREF/ICSPCLK

RA1: Pin1 of  Port A

AN1: Analog input1

CIN-: Comparator input

VREF: External Voltage reference

ICSPCLK: Serial Programming Clock

13

RA0/AN0/CIN+/ICSPDAT

RA0: Pin0 of  Port A

AN0: Analog input0

CIN+: Comparator input

ICSPDAT: Serial Programming Data I/O

14

VSS

Ground

 

PIC16F676 Features and Electrical characteristics

CPU

8-bit

Total number of pins

14

Programmable pins

12

Communication Interface

ICSP or In-Circuit Serial Programming Interface (13,14 Pins) [Can be used for programming this controller]

ADC Feature

8 channels of 10-bit resolution

Timer Feature

One 8-bit counter, One 16-bit counter

PWM channels

Not available

Analog Comparator

Available-1

External Oscillator

Up to 20MHz

Internal Oscillator

4MHz  Internal R-C Oscillator factory calibrated to ±1%

Program memory / Flash memory

2Kbytes[100000 write/erase cycles]

CPU Speed

1MIPS @ 1MHz

RAM

64bytes

EEPROM

128bytes

Watchdog Timer

 

Available and is featured with Independent

Oscillator for Reliable Operation

Power Save Modes

Available

Operating Voltage

2.0V to 5.5V

Maximum current to any I/O pin

IN :25mA

OUT : 25mA

Operating Temperature

-40°C to +125°C

Maximum current into VDD pin

250mA

 

PIC16F676 Replacement

PIC16F630

 

Similar Microcontrollers

PIC16F636, PIC16F684

 

PIC16F676 Microcontroller Overview

PIC16F676 is a microcontroller good for learning and experimenting for engineers because it has high flash memory rewrite cycle. The controller has 2KBytes flash memory which is enough for starters to develop basic programs. Also the 12 GPIO are designed for handling 20mA current (LED driving capability) by which beginners can connect peripheral at hand with less caution.

PIC16F676 has very few features and it cannot be used for developing advanced applications. It is used for developing small applications (like display driver) and for developing programs by beginners who want to enter microcontroller platform.

 

How to use PIC16F676 Microcontroller

Any microcontroller is needed to be programmed before installing in any system or application. So first we need to program the controller PIC16F676.

Entire process of programming PIC16F676 goes like this:

  • First list all the functions to be executed by this controller.
  •  Next write these functions in ‘IDE software’ using ‘C’ language.
  • This IDE software can be downloaded for free on company website.
  • After writing the desired program compile it for error elimination.
  • For a successful compilation IDE application generates HEX file for the written program.
  • Choose the programming device (usually ‘PIC kit 3’ or ‘PIC kit 2’) which establishes communication between PC and PIC16F676.
  • Connect the programming device to microcontroller appropriately.
  • Run the HEX file dumping software which is related to the chosen programming device.
  • Choose the appropriate program HEX file and burn this HEX file in PIC16F676 flash memory.
  • Disconnect the programmer and connect the appropriate peripherals for the controller.

After connecting the power, the controller executes this HEX code saved in the memory (which is written program) and creates response as instructed.

 

Applications

  • Beginner applications
  • Hobbyist projects
  • Display units
  • Development board for learners
  • Embedded systems like scrolling displays and meters

 

2D-Model

PIC16F676 Microcontroller Dimensions

Component Datasheet

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