UNO PINOUT SERIAL
ICSP stands for In-Circuit Serial Programming. Each slave device typically has its own SS line, allowing the master to choose which slave to communicate with. SS (Slave Select): This line is used by the master to select a specific slave device for communication. MISO (Master In Slave Out): This line is used by the slave device to send data back to the master. MOSI (Master Out Slave In): This line is used by the master to send data to the slave device. SCLK (Serial Clock): This line carries the clock signal generated by the master, which synchronises the data transfer between the master and slave devices. It typically uses the following connection in between devices to communicate with each other
SPI (Serial Peripheral Interface): It is a synchronous communication protocol and hardware interface commonly used for short-distance communication between microcontrollers, peripheral devices, and integrated circuits. SCL carries the clock signal and SDA is used to transmit and receive data in between master and slaves. I2 C (Inter-Integrated Circuit): A widely adopted bidirectional interface called the I2C bus enables communication between a master controller and multiple slave devices. RX is the input pin, and TX is the output pin. UART (Universal Asynchronous Receiver / Transmitter) : These pins are used for serial communication with other devices without sharing a common clock signal. IOREF: This pin indicates the Operating voltage of the Arduino. Reset: This pin serves the function of resetting the microcontroller. There are multiple GND pins available on the Arduino Uno.
GND: These pins are the ground (0V) connections for your circuit. You can power 3.3V components of limited current requirement with it. You can use this pin to power external components that require 5V.ģ.3V: This pin provides a regulated 3.3V power output. It can accept voltages from 7V to 12VĥV: This pin provides a regulated 5V power output. Vin: This pin allows you to provide an external power supply to the Arduino Uno. AREF pin determines the reference voltage for analog-to-digital conversions which can be provided externally. In case of a need, these analog pins can be employed as digital input/output pins as well.ĪREF stands for Analog Reference in the context of analog-to-digital converters (ADCs). Some of these pins have I2C communication protocols. These pins can be used to read analog voltage levels using the onboard analog-to-digital converter ( ADC ). There are 6 analog input pins, labeled as A0 to A5. Additionally, some of these pins have additional functionalities like PWM (Pulse Width Modulation) and SPI (Serial Peripheral Interface) protocols. These pins support both digital input and output functionality. There are 14 digital input/output pins, labeled as D0 to D13. Here is a brief overview of the Arduino Uno pinout: D igital Pins:
The Arduino Uno is a popular microcontroller board that has a specific pinout arrangement.
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