Arduino mega 2560 rev 3 pinout chart
Used to receive (RX) and transmit (TX) TTL serial data. Each pin can provide or receive a maximum of 40 mA and has an internal pull-up resistor (disconnected by default) of 20-50 kOhms. The CH340 has 256 KB of memory for storing code (of which 8 KB is used by the bootloader) 8 KB of S-RAM and 4 KB of EEP-ROM (which can be read and written with the EEP-ROM library).Įach of the 54 digital pins on the Mega can be use as an input or output, using pinMode(),digitalWrite() and digitalRead() functions. 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. IOREF – This pin on the board provides the voltage reference with which the microcontroller operates. We don’t advise it.ģV3 – A 3.3 volt supply is generated by the on-board regulator.
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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). You can supply voltage through this pin, or, if supplying voltage via the power jack, access it through this pin.ĥV – This pin outputs a regulated 5V from the regulator on the board. V-IN – This represents the input voltage to the board when it’s using an external power source (as opposed to 5 volts from the USB connection or other regulated power source). Dimensions: 111mm x 54mm x 12mm (LxWxH).Ībout the Arduino Mega 2560 Rev 3 : The power pin schematics are as given:.Memory 256 KB of which 8 KB is used in the bootloader.Digital Input/Output Pins 54 (15 provide PWM output).The second one is not connected to a pin, which is reserved for future purposes.Ītmega 16U2 replaced with the 8U Package Includes :ġ x Arduino Mega 2560 Rev3 with Cable Arduino Specifications and Features of Arduino Mega 2560 Rev3 with Cable Arduino : In the future, shields will be compatible with the board that uses the AVR, which operate with 5V and with the Due that operates with 3.3V. Version 3 of the board has the given new features :ġ.0 pinout: An added SDA and SCL pins near the AREF pin and two other new pins are placed near the RESET pin, the IOREF that allows the shields to adapt to the voltage provided from the board. Version 2 of the Arduino Mega2560 board has a resistor pulling the 8U2 HWB line to ground, making it easier to put it into the DFU mode. Instead, it features the CH340 chip programmed as a USB-to-serial converter.
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It differs from all previous boards in the manner that it does not use the FTDI USB-to-serial driver chip. The Arduino Mega 2560 is an updated version of Mega. The Arduino Mega is compatible with most shields design for the Arduino Duemilanove or Arduino Diecimila. It has everything that is required to support the microcontroller’s operation, connect it to a PC with a USB cable or power it up with an AC-DC adapter/battery to get it started. It has a total of 54 digital I/O pins (of which 15 pins can be used for PWM outputs), 16 analog inputs, 4 UARTs (hardware serial ports), a 16-MHz crystal oscillator, a micro USB connection, a power jack, an ICSP header, and a reset button. Still a bit muddy to me though.The Arduino Mega 2560 Rev3 with Cable Arduino is a micro-controller board that is based on the CH340 chip.
![arduino mega 2560 rev 3 pinout chart arduino mega 2560 rev 3 pinout chart](https://core-electronics.com.au/media/wysiwyg/tutorials/aidan/Pinout_of_the_MEGA.png)
If only USBVCC was connected to UVCC, and VCC was disconnected from the 5V bus, would 5V still come out of the VCC pin?ĮDIT2: Ok, I think I see on the datasheet that 3.3V will come out of VCC if it is not pulled up by another source. Yes, its VCC is connected to the 5V bus.ĮDIT: I'm still confused about this though.
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The schematic you linked shows USBVCC connecting directly to UVCC on pin 31 of the Atmega16U2. The USBVCC voltage from the USB connector goes only to one place, the T1 FET switch. You must be looking at a different schematic then I am? The 16U2 chip has it's Vcc on chip pin 4 and it clearly wires to the board's +5V bus, not to the USBVCC bus. Now I see that it's connected to the MOSFET down below as well. Seems silly, but this is the only thing that made sense to me, because the 16U2 is the only thing I saw USBVCC connected to. For some reason I had it in my mind that power came in through UVCC on the 16U2, was regulated there and came out of it's VCC port to supply the 5V line.