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Arduino nano pinout i2c5/1/2023 ![]() ![]() Also when the board is connected to the computer, any data transfer via Serial library is done via this connector.Īrduino Nano USB Port Arduino Nano USB Port LEDs ![]() The board has a USB Mini B port, which can be used for programming the board as well as providing power to the board. It's mostly used in cases where you can't program the board using USB via Arduino IDE.Īrduino Nano ICSP Headers Arduino Nano ICSP Headers USB Port You can also use another Arduino board as a programmer. You can connect a programmer board (a dedicated hardware) to these pins and transfer your firmware to the board via that. It's another way of programming the board. The ICSP header is intended for programming the board with an external programmer. ![]() It has the same effect as connecting the RST pins to the ground.Īrduino Nano Reset Button Arduino Nano Reset Button ICSP Header The reset button can be used to restart the microcontroller or to put it into bootloader mode for uploading new sketches. They can be used for reading analog signals such as temperature sensors, light sensors, and potentiometers.Īrduino Nano Analog Pins Arduino Nano Analog Pins Reset Button The board provides 8 analog input pins labeled A0 to A7 connected to its 10-bit ADC. PWM pins are D3, D5, D6, D9, D10 and D11.Īrduino Nano Digital Pins Arduino Nano Digital Pins Analog Input Pins But it's important to note that pins A6 and A7 can only be used as digital output, not digital input.Īmong those digital pins, 6 of them can also be used as PWM outputs for different purposes such as controlling the brightness of LEDs or the speed of motors as an example. This is explicitly mentioned in the documentation of digitalRead() function. So it's better not to use them until you really ran out of digital pin for your project.Īlso all the analog pins of the board can be used as digital pin. It's because they're used for serial communication when the board is connected via USB to computer. The first two digital pins D0 and D1 are labeled as RX0 and TX1. Otherwise, their technical specifications are the same.Īrduino Nano's Microcontroller Arduino Nano's Microcontroller Digital I/O PinsĪrduino Nano has 14 digital input/output pins labeled from D2 to D13. The letter 'P' in the microcontroller's name is for Picopower, referring to the fact that it has less power consumption than the ATmega328 which is used in Arduino Uno Rev3. The main processor of the Arduino Nano is the ATmega328P microcontroller in 32-pin quad flat package (VQFN). Therefore, whenever we measure the SDA or SCL signals and the voltage at logic LOW is higher than 0.In this section we review the board pinout and will have an overview on its physical properties as well as major components on the board.Īrduino Nano Dimensions 18 mm 45 mm Arduino Nano Dimensions The ATmega328P Microcontroller ![]() The I2C bus specification and user manual also sets a maximum of 0.4V for the low-level output voltage, because it indicates that a maximum sink current of 3mA The voltage drop across the transistor, also known as the low-level output voltage, is the voltage level when the signal is at a logic LOW. It also means, that circuitĭesigners should take this limit in mind when dimensioning the pull-up resistors.Īnd how do we know if the sink current in our circuit is above the 3mA limit? Well, increasing the sink current means that the voltage drop across the That means that devices specified for using the I2C bus must work with a sink current of 3mA flowing across the transistor. Manual sets a maximum of 3mA across the transistor. Knowing that, the I2C bus Specification and User A larger current across the transistor leads to more heat being dissipated within the device, and overheating is a major cause of failures of semiconductorĭevices. ![]()
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