Uno r3 schematic serial#

Uno r3 schematic serial#

To reset the microcontroller, you can use the on-board RESET button.Īlthough you can program the Arduino UNO using the USB cable, there is a provision to program the MCU using the In-Circuit Serial Programming (ICSP) interface. Using the IOREF pin, you can set the reference voltage for Microcontroller operations.

But using the AREF pin, you can manually set the upper limit of the ADC. The reference voltage for the internal ADC is by default set to 5V. Use this LED to perform Blinky operations. There is an on-board LED connected to digital IO pin 13. Digital IO Pins 10, 11 12 and 13 can be configured as SPI pins SS, MOSI, MISO and SCK respectively. The final communication interface is the SPI. They can be configured as SDA (A4) and SCL (A5) to support I2C or I 2C or Two Wire Interface (TWI) communication. These pins are connected to the serial pins of the on-board USB to Serial Converter IC.Īnalog Input Pins A4 and A5 have alternative functions. In fact, the Arduino boards (UNO or Nano or Mega) are programmed using the serial communication.ĭigital IO pins 0 and 1 are used as Serial RX and TX pins to receive and transmit serial data. Perhaps the most common communication interface in the Arduino universe is the Serial Communication. What Communication Interfaces are available on Arduino UNO?Īrduino UNO supports three different types of communication interfaces. You can use analogWrite() function for this. All the analog input pins provide a 10-bit resolution ADC feature, which can be read using analogRead() function.Īn important point about Analog Input pins is that they can be configured as Digital IO pins, if required.ĭigital IO pins 3, 5, 6, 9, 10 and 11 are capable of producing 8-bit PWM Signals. There are also 6 Analog Input Pins (A0 to A5). The value of the internal pull-up resistor will be in the range of 20KΩ to 50KΩ. An additional feature of the Digital IO pins is the availability of internal pull-up resistor (which is not connected by default). In that 14 pins (D0 to D13) are true digital IO pins, which can be configured as per you application using pinMode(), digitalWrite() and digitalRead() functions.Īll these Digital IO pins are capable of sourcing or sinking 20mA of current (maximum 40mA is allowed). Of the 32 pins available on the UNO board, 22 pins are associated with input and output. What are the Input and Output Pins of Arduino UNO?

0.5 KB of the Flash Memory is used by the bootloader code.

There are three different memories available in ATmega328P. Strictly speaking, this is specific to the MCU i.e., ATmega328P, used on the Arduino UNO Board. What are Different Memories of Arduino UNO? You can also supply the unregulated supply through the 2.1mm DC Jack, in which case, you can access the supplied voltage through the VIN Pin. The next way is to provide an unregulated supply in the range of 6V to 20V to VIN pin of the UNO (Pin number 26). The first and easy way is using the Type-B USB Connector. There are a couple of ways in which you can power the UNO board.

But none the less, let me give you a brief overview about some important specifications of Arduino UNO. Technical Specifications of Arduino UNOĪs Arduino UNO is based on ATmega328P Microcontroller, the technical specifications of Arduino UNO are mostly related to the ATmega328P MCU.

I will discuss about the pins of Arduino UNO in the Arduino UNO Pinout Section. There is also a 2.1 mm DC jack to provide external power supply.Īpart from that, the layout of Arduino UNO is very much self-explanatory. Layout of Arduino UNO BoardĪs you can notice, there is a Type-B USB connector on the left short edge of the board, which is used for powering on the board as well as programming the Microcontroller. All the components are placed on the top side of the PCB. The following image shows the layout of a typical Arduino UNO board. Other than that, rest is identical in both the boards. Arduino UNO comes in two variants: one consists of a 28-pin DIP Microcontroller while the other consists of 32 lead Quad Flat Package Microcontroller. Arduino UNO in DIP and SMD PackagesĪrduino UNO is based on ATmega328P Microcontroller, an 8-bit AVR Architecture based MCU from ATMEL. There are other boards like the Arduino Nano and the Arduino Mega, but UNO has been the go-to board for quick prototyping, Arduino Projects and DIY Projects.

Perhaps the most popular board in the Arduino line-up is the Arduino UNO. What Communication Interfaces are available on Arduino UNO?.What are the Input and Output Pins of Arduino UNO?.What are Different Memories of Arduino UNO?.Technical Specifications of Arduino UNO.