The SPI pins are broken out on the central 6-pin header, which is physically compatible with the Uno, Leonardo and Mega2560. These pins support SPI communication using the SPI library.
SPI: SPI header (ICSP header on other Arduino boards).the resolution of the PWM can be changed with the analogWriteResolution() function. Provide 8-bit PWM output with the analogWrite() function. Pins 0 and 1 are connected to the corresponding pins of the ATmega16U2 USB-to-TTL Serial chip. Used to receive (RX) and transmit (TX) TTL serial data (with 3.3 V level). In addition, some pins have specialized functions: They also have an internal pull-up resistor (disconnected by default) of 100 KOhm. Each pin can provide (source) a current of 3 mA or 15 mA, depending on the pin, or receive (sink) a current of 6 mA or 9 mA, depending on the pin. 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.Įach of the 54 digital pins on the Due can be used as an input or output, using pinMode(), digitalWrite(), and digitalRead() functions. This pin on the Arduino board provides the voltage reference with which the microcontroller operates. This regulator also provides the power supply to the SAM3X microcontroller. 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). 5V.This pin outputs a regulated 5V from the regulator on the board.You can supply voltage through this pin, or if supplying voltage via the power jack, access it through this pin. Vin. The input voltage to the Arduino board when it's using an external power source (as opposed to 5 volts from the USB connection or other regulated power source).
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