- Arduino Mega 2560 R3 Pinout Pdf
- Arduino Mega 2560 R3 Pinout Diagram Pdf
- Arduino Mega 2560 Pin Diagram
- Arduino Mega 2560 R3 Pinout
First of all, Why Arduino Mega 2560?
When cheaper boards are available, why go with Arduino Mega? The main reason behind this is the additional features that are inbuilt with this board. First feature is the large I/O system design with inbuilt 16 analog transducers and 54 digital transducers that supports with USART and other communication modes. Secondly, it has inbuilt RTC and other features like analog comparator, advanced timer, interrupt for controller wakeup mechanism to save more power and fast speed with 16 Mhz crystal clock to get 16 MIBS. It has more than 5 pins for Vcc and Gnd to connect other devices to Arduino Mega.
Other features include JTAG support for programming, debugging and troubleshooting. With large FLASH memory and SRAM, this board can handle large system program with ease. It is also compatible with the different type of boards like high-level signal (5V) or low-level signal (3.3V) with I/O ref pin.
Brownout and watchdog help to make the system more reliable and robust. It supports ICSP as well as USB microcontroller programming with PC.
- Arduino Mega 2560 is an ideal choice for the projects requiring more memory space to used with more number of number pins on the board. Following are the main applications of the Arduino mega boards.
- Cbga-pinout atmega640/1280/258 9 10 a gnd aref pf0 pf2 pf5 pk0 pk3 pk6 gnd vcc b avcc pg5 pf1 pf3 pf6 pk1 pk4 pk7 pa0 pa2 c pe2 pe0 pe1 pf4 pf7 pk2 pk5 pj7.
- ATmega2560-Arduino Pin Mapping. Pin Number Pin Name Mapped Pin Name 1 PG5 ( OC0B ) Digital pin 4 (PWM) 2 PE0 ( RXD0/PCINT8 ) Digital pin 0 (RX0).
- Arduino Mega 2560 Rev3 Pinout, Atmega2560 Pin Mapping, Eagle Files, Schematics, and More! They are also broken out on the ICSP header, which is compatible with the Uno, Duemilanove, and Diecimilia. LED: Pin 13 connects to the built-in LED. When the pis is HIGH value the LED is on, when it is LOW value it's off. TWI: Pin 20 (SDA) and 21 (SCL) support TWI communication using the WIRE library.
The Arduino Mega 2560 is a replacement of the old Arduino Mega, and so in general reference, it will be called without the ‘2560’ extension. Due to the many numbers of pins, it is not usually used for common projects but you can find them in much more complex ones like Radon detectors, 3D printers, temperature sensing, IOT applications, real-time data monitoring applications etc.
Arduino Mega 2560 Specifications
Aug 06, 2018 Arduino Mega 2560 Pinout Diagram Pdf. Posted on August 6, 2018 by admin. Armuno mearm arduino servo wire schematic rh microbotlabs com ir led circuit analogwrite command arduino micro pinout diagram pdf images gallery arduino mega pinout diagram mega2560 schematic pdf atmel atmega32u4 pinout diagram. Arduino Mega 2560 Reference Design Reterence Designs ARE PRO VIDED 'AS IS' AND 'WI TH ALL FAULTS DISCLAIMS ALL OTHER WARRANTIES, EXPRESS OR IMPLIED, REGARDING PRODUCTS, INCLUDING BUT NOT LIMITED TO, ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FORA PARTICULAR PURPOSE Arduino may make changes to specifications and product descriptions at any.
Arduino Mega – Basic Features
| Arduino Mega | Features |
|---|---|
| Microcontroller | AVR ATmega 2560 (8bit) |
| Power Supply | 7-12V (Inbuilt Regulator for Controller) |
| Digital I/O Pins | 54 |
| Analog I/O Pins | 16 |
| Total Digital I/O | 70 (Digital + Analog) |
| Clock Speed | 16 MHz (Factory set to 1Mhz) |
| Flash Memory | 128 KB |
| SRAM | 8 KB |
| Communication | USB (Programming with ATmega 8), ICSP (programming), SPI, I2C and USART |
Arduino Mega – Advanced Features
| Arduino Mega | Advanced Features |
|---|---|
| Timer | 2 (8bit) + 4 (16bit) = 6 timer |
| PWM | 12 (2-16 bit) |
| ADC | 16 (10 bit) |
| USART | 4 |
| Pin Change Interrupt | 24 |
Arduino Mega 2560 is also packed with additional features like Analog Comparator, External Interrupt & Software Interrupt, Power Saving Mode, Inbuilt Temperature Sensor, RTC and more.
Arduino Mega Pinout
Power pins :
| Arduino Mega | Power Pins |
|---|---|
| VIN | Supply voltage (7-12V) |
| GND | Ground |
| 5V Supply | For External hardware device power supply |
| 3.3V Supply | For External low voltage hardware device power supply |
Arduino Mega Pin Diagram
Arduino Mega Pin Configuration
Controller Pins:
RESET: (Reset input) A low level on this pin for longer than the 4 clock cycle will generate a reset. Arduino Mega has inbuilt reset circuit with push button to reset system and this pin can be used by other devices to reset controller.
XTAL1,XTAL2: Crystal (16Mhz) is connected to supply clock for controller with 2 bypass capacitor to ground.
AREF: This pin is used, when we use Adc for analog to digital conversion with external reference voltage for conversion and don’t want to use internal 1.1V or 5v reference.
Digital pins (70):
Digital Pins: From 0-53(digital) and 0-15(analog) can be use as input or output for digital transducer and output devices by pinMode() for pin direction, digtalWrite() to write pin and digitalRead() to read pin status.
Application:
Output devices : Relay, LED, buzzer, LCD and others.
Input devices: digital thermistor, push button, ultrasonic sensor, joystick and others
Example:
- Output low signal on Arduino mega board
pinMode(0,OUTPUT);
digitalWrite(0,LOW);
- Input read signal on Arduino mega board
pinMode(0,INPUT);
digitalRead(0);
Analog Pins (16):
Analog pins: From 0-15(analog) can be used as analog input pin for adc, if not used than it work as normal digital pin. It can be used by pinMode() for pin direction, analogRead() to read pin status and get digital value for analog signal, care must be taken for internal or external reference voltage selection and Aref pin.
Application :
Input devices: Ntc thermistor, sensors (like ldr, irled and humidity) and others
Example :
- INPUT analog signal on Arduino mega board
pinMode(0,INPUT);
analogRead(0);
Alternative Pins Function:
SPI Pins:
These pins are used for serial communication with SPI protocol for communication between 2 or more devices. SPI enable bit must be set to start communication with other devices.
Application:
Programming AVR controller, communication with others peripheral like LCD and SD card with four-line communication at high speed.
I2C Pins:
Digital pin 20 for SDA and 21 for SCK (Speed 400khz) to enable two wire communication with others devices. Function used are wire.begin() to start I2C conversion, with wire.Read() to read i2c data and wire.Write() to write i2c data.
Application:
Output devices : LCD and communication between multiple devices with two wire.
Input devices : rtc and others.
Arduino Mega 2560 R3 Pinout Pdf
Example:
I2c master read data from slave
Wire.begin();
Wire.requestFrom(2, 1); //1byte data
Wire.Read();
PWM Pins:
Digital pin 2-13 can be used as PWM output with analogWrite() to write pwm value from 0-255.It’s alternative of DAC for low cost system to get analog signal at output by using filter.
Application:
Output devices: speed control of motor, light dimmer, pid for efficient control system.
Example:
- OUTPUT analog signal on Arduino mega board
pinMode(0,OUTPUT);
analogWrite(0,255);
USART Pins :
This pin is used for serial usart communication with pc or other system for data sharing and logging. It is used with serialBegin() to set baud rate setting and start communication with serial.Println() to print array of char on other device output.
Application:
Arduino Mega 2560 R3 Pinout Diagram Pdf
Two controller communication, pc and controller communication, debugging with usart by serial monitor.
Example:
Serial.begin(9600);
Serial.Println(“hello”);
Pinchange Interrupt Pins:
This pin is used for pin change interrupt. Enable bit of pinchange interrupt must be set with global interrupt enable.
Application :
Rotary encoder, push button based interrupt and others.
Example :
pinMode(0, OUTPUT);
pinMode(1, INPUT_PULLUP);
attachInterrupt(digitalPinToInterrupt(1), LOW, CHANGE);
Hardware Interrupt Pins :
Digital pin 18 – 21,2,3 hardware interrupt is used for interrupt services. Hardware interrupt must be enabled with global interrupt enable to get interrupt from other devices.
Application:
Push button for ISR program, wake up controller with external devices, sensors like ultrasonic and others.
Example:
pinMode(0, OUTPUT);
pinMode(1, INPUT_PULLUP);
attachInterrupt(digitalPinToInterrupt(1), LOW, LOW);
Arduino Mega Schematic Components:
DC Jack Power Supply :
External Supply for Arduino Mega from range 7-12 volt is given with this port. Arduino Mega R3 has a voltage regulator for 5v and 3.3v supply for Arduino controller and sensor supply.
AVR 2560 :
This is the main controller used to program and run task for the system. This is the brain of the system to control all other devices on board.
ATmega8 :
This controller is used for communication between the main controller and other devices. This controller is programmed for USB communication and serial programming features.
ICSP 1 (ATmega8) and 2 (AVR 2560):
It has features of programming using serial bus with AVR programmer using SPI communication. AVR 2560 is programmed to run the system and ATmega 8 is programmed for serial communication and programming.
Reset :
It has reset circuit with capacitor, button and resistor to reset the controller. A push button is used to get 4 cycle low signal on reset pin to get the controller in reset mode.
Arduino Mega 2560 Pin Diagram
Crystal :
It has a crystal circuit with two capacitors and one 16 Mhz crystal for xtal pins 1 and 2 interfacing with avr 2560.
I2C :
It has features of I2C (two wire communication) with an external pull-up resistor.
USART :
It has TXD and RXD pin for serial communication with LED indicator.
Some Simple Programs to try on Arduino Mega 2560
Program 1: Blinking LED (Digital pin)
Program 2: Led Light Dimmer (PWM):
Program 3: Analog Read Voltage (Analog pin with USART) :
Arduino Mega 2560 R3 Pinout
You may also try your own logic and implement programs for Arduino mega with basic C and Arduino function.