5/2/2024 0 Comments Arduino mega 2560 current pinSee About ADC reference voltage on Portenta H7. The AREF pin is not connected to anything.Īny external voltage applied to the AREF pin will be automatically used as the reference. The reference voltage essentially specifies the value for the top of the input range, and consequently each discrete step in the converted output. The microcontroller only supports internal reference. The AREF (Analog Reference) pin can be used to provide an external reference voltage for the analog-to-digital conversion of inputs to the analog pins. Note: To avoid damaging your board, read the library reference's notes and warnings section before using an external reference voltage. ![]() analogReference(EXTERNAL) for AVR boards. Pinbelegung: IOREF I/O Reference Voltage for shields RESET Reset Input 3.3V 3.3V Output (50 mA) 5V 5V Output GND Ground GND Ground Vin 7-12V Input A0 Analog Pin 0 / Digital Pin 54 A1 Analog Pin 1 / Digital Pin 55 A2 Analog Pin 2 / Digital Pin 56 A3 Analog Pin 3 / Digital Pin 57 A4 Analog Pin 4 / Digital Pin 58. Enable it by calling analogReference() with the appropriate option for your board, i.e.
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