PIC16F676 – 8 bit Microcontroller

9 November 2018 - 0 Comments

PIC16F676 Microcontroller

PIC16F676 Pinout

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.