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Arduino mega 2560 spi pinout4/16/2024 As Arduino Mega is based on ATmega2560 Microcontroller, the technical specifications of Arduino Mega are mostly related to the ATmega2560 MCU. Technical Specifications of Arduino Mega. I will discuss about the pins of Arduino Mega in the Arduino Mega Pinout Section. Note that these pins are not in the same location as the TWI pins on the old Duemilanove or Diecimila Arduino boards. Apart from that, the layout of Arduino Mega is very much self-explanatory. Support TWI communication using the Wire library. When the pin is HIGH value, the LED is on, when the pin is LOW, it's off. There is a built-in LED connected to digital pin 13. It should be noted that with a power supply voltage of 7-20. The controller provides 256KB of Flash memory for storing firmware, 8KB of SRAM, and 4KB of non-volatile EEPROM memory for data storage. The SPI pins are also broken out on the ICSP header, which is physically compatible with the Arduino /Genuino Uno and the old Duemilanove and Diecimila Arduino boards. The heart of the Arduino Mega platform is an 8-bit AVR family microcontroller ATmega2560 with 16 MHz clock speed. These pins support SPI communication using the SPI library. Provide 8-bit PWM output with the analogWrite() function. See the attachInterrupt() function for details. These pins can be configured to trigger an interrupt on a low level, a rising or falling edge, or a change in level. External Interrupts: 2 (interrupt 0), 3 (interrupt 1), 18 (interrupt 5), 19 (interrupt 4), 20 (interrupt 3), and 21 (interrupt 2).Pins 0 and 1 are also connected to the corresponding pins of the ATmega16U2 USB-to-TTL Serial chip. Used to receive (RX) and transmit (TX) TTL serial data. In addition, some pins have specialized functions: A properly configured shield can read the IOREF pin voltage and select the appropriate power source or enable voltage translators on the outputs for working with the 5V or 3.3V. This pin on the board provides the voltage reference with which the microcontroller operates. A 3.3 volt supply generated by the on-board regulator. ![]() Supplying voltage via the 5V or 3.3V pins bypasses the regulator, and can damage your board. The board can be supplied with power either from the DC power jack (7 - 12V), the USB connector (5V), or the VIN pin of the board (7-12V). This pin outputs a regulated 5V from the regulator on the board. It also has an extra USB Micro B allowing it to act as USB device. Pins 10-13 are usually used, but there are also MOSI, MISO, and SCLK pins on the ICSP header (near the ATMEGA chip). You can supply voltage through this pin, or, if supplying voltage via the power jack, access it through this pin. Arduino Mega 2560 Rev3 Arduino Micro Arduino Mini Arduino Nano Arduino Nano. The input voltage to the board when it's using an external power source (as opposed to 5 volts from the USB connection or other regulated power source). If Iâve confused you anywhere, post your code and tell us which pins youâve used for each device, weâll show you where to edit your software so it matches what youâve done in hardware. Again, the pin you use must appear in the object constructor in your software. The second device needs its own CS pin and you can use any digital pin you desire. The CS on pin 53 can only be connected to one device, it does not matter which one but it needs to match the software pin declaration. You can use those pins in addition to those on 50, 51 and 52 as they are connected in parallel on the pcb. The six pin connector to the right of the atMeag2560 processor are the duplicate pins Nick is referring to. Those are the SPI pins for the dedicated USB to serial converter atMega processor. I know there is a separate 6 pin by the reset button is also for MOSI ![]() Here, AVR stands for Audio Video Recorder and RISC. ![]() The Mega 2560 is based on AVR RISC Architecture. They are just a common alternative set of pins. The Pinout of Arduino Mega is shown below: The description of pins present on the Arduino board are listed below: ATmega2560 Microcontroller - The Atmega2560 is a CMOS (Complementary Metal Oxide Semiconductor) low powered 8-bit microcontroller. ![]() It is quite OK to use them, indeed it is standard practice to so.
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