It has 14 digital input/output pins (of which 6 can be used as PWM outputs), 6 analog inputs, a 16 MHz ceramic resonator (CSTCE16M0V53-R0), a USB connection, a power jack, an ICSP header and a reset button. Out of these 32 pins, 14 are digital I/O pins, 6 are analog pins, 3 GND and single 5V,3.3V, Vin and reset pin, and more.Arduino Uno is a microcontroller board based on the ATmega328P ( datasheet). If you take a look at the Arduino board you will find that there are a total of 32 pins on it(excluding the ICSP header).
Of course, you can add multiple tasks in a single program but they will be executed one by one. Unlike your laptop or mobile phone, it can run only one program at a time. Īrduino UNO is a simple microcontroller board without any operating system or powerful processor. You can say, atmega328p is the brain of the Arduino UNO development board. It is actually a development board that uses a microcontroller called Atmega328p to perform various functions. Is Arduino a Microcontroller or Microprocessor?Īrduino UNO is neither a microprocessor nor a microcontroller. Since this was the first official Arduino board released by the company, hence the word UNO in it. Yes, it’s a Latin word and does not have any full form. What is the full form of UNO in Arduino UNO? Mechanical Diagram of Arduino UNO Datasheet of Arduino UNO Rev3ĭownload the official Datasheet of Arduino UNO Rev3, from here. It also represents the successful flow of data. The TXD is used to transmit the data, and RXD is used to receive the data. TXD and RXD-TXD and RXD pins are used for serial communication. This allows us to have multiple SPI peripheral devices sharing the same MISO, MOSI, and CLK lines.Įxternal Interrupts (2 and 3)- These pins can be used to trigger an interrupt on a low value, a rising or falling edge, or a change in value. When it’s value HIGH, it ignores the master. When a device’s Slave Select pin value is LOW, it can communicate with the master.
This line is used for sending data to the peripherals.
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