Onboard has 16 analog inputs, labeled A0 to A15.
You can supply an external power input DC7-12V through this pin to Arduino board. The function is the same as reset button.
Maximum current draw is 50 mA.Ĭonnect an external button to reset the board. 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.Ī 3.3 volt supply generated by the on-board regulator. This pin on the board provides the voltage reference with which the microcontroller operates. To control the voltage provided to the Arduino board, as well as to stabilize the DC voltage used by the processor and other components.Ĭonvert an external input DC7-12V voltage into DC 5V, then switch DC 5V to the processor and other components.Īrduino board can be supplied with an external power DC7-12V from the DC power jack. It tells us that the frequency is 16,000,000 Hertz or 16MHz. The number printed on the top of the Arduino crystal is 16.000H9H. How does Arduino calculate time? by using a crystal oscillator.
When Arduino board communicates via serial port, receive the message, RX led flashes. Onboard you can find the label: RX(receive ) When Arduino board communicates via serial port, send the message, TX led flashes. Onboard you can find the label: TX (transmit) USB to serial chip, can convert the USB signal into serial port signal. When the pin is HIGH value, the LED is on, when the pin is LOW, it's off. There is a built-in LED driven by digital pin 13.
the value used as the top of the input range).Īrduino board can be powered via USB connector.Īll you needed to do is connecting the USB port to PC using a USB cable. Used with analogReference().Ĭonfigures the reference voltage used for analog input (i.e. Reference voltage (0-5V) for analog inputs. Using pinMode(), digitalWrite(), and digitalRead() functions. Or used as digital output pin to drive different modules like LED, relay, etc. These pins can be configured as digital input pin to read the logic value (0 or 1).
Here is an explanation of what every element and interface of the board does:Īrduino MEGA has 54 digital input/output pins (of which 15 can be used as PWM outputs).
It is strongly encouraged to download the USB driver for your operating system from WCH official website. A separate safe driver is needed to allow your host computer to communicate with the MEGA 2560.
The MEGA 2560 Pro utilizes an onboard CH340G UART.