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Does atmega328 have ADC?
The Atmel ATmega328P microcontroller used on the Arduino Uno has an analog-to-digital conversion (ADC) module capable of converting an analog voltage into a 10-bit number from 0 to 1023 or an 8-bit number from 0 to 255. The input to the module can be selected to come from any one of six inputs on the chip.
How do I read multiple ADC channels on ATmega328?
When the level is correct they will press one button to store the PWM setting in eeprom. Then they will press another button to exit that screen and return to the main menu. My thought was to use the interrupt routine to switch ADC channels and just toggle back and forth between the two channels.
What’s the value of the ADC on ATmega328P?
On the ATmega328P this is also * on or off. The ADC we are using is 10-bits so can be a value from * 0 to 1023. The value 0 means that there is no voltage on the ADC pin * AREF pin. */ /* This function just keeps the reading code out of the loop itself.
What kind of ADC accepts both positive and negative voltages?
The ADCs whose AIN falls in the positive range 0V < AIN < VREF are called Unipolar ADC. ADCs capable of accepting both positive and negative input voltages are called Bipolar ADC. The entire input voltage range (0V to VREF) is divided into a number of sub-ranges called steps.
What does bit 6 and 7 tell the ATmega328P?
Bit 6 and 7 tells the Atmega328p against what reference the voltage on the pin should be measured. This is important for the precision of the 10 bit read value. For example, it is possible to put 2V as a reference on the AREF pin. In that case the 10 bits (value up to 1023) will be divided over 2V.
What does ATmega328P stand for in Arduino Uno?
It could stand for either one of : “Analog-Digital Converter” or “Analog-Digital Conversion”. Hopefully this isn’t too confusing. I own an Arduino Uno, which runs an ATMega328p microprocessor ( datasheet ).