Which powered the main chip? No.7 VCC or No.22 AVCC?

Arduino Uno main chip atmega328 is made into the smallest system, and the program has been burned. If 5V DC is used for external power supply, should it be powered from No.7 VCC and GND, or No.22 AVCC and GND?

tessieswift07-29-2021 8:11am

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imhififan Details Discussions Posts This discussion Message User 2,181 posts 08-03-2021 at 04:11pm Copy Comment URL Report Comment Edit Delete Both! AVcc is the supply voltage pin for the A/D Converter, It should be externally connected to Vcc even if the ADC is not used. https://ww1.microchip.com/downloads/en/DeviceDoc/ATmega48A-PA-88A-PA-168A-PA-328-P-DS-DS40002061B.pd...
ebm Details Discussions Posts This discussion Message User 9,311 posts 08-03-2021 at 01:59pm Copy Comment URL Report Comment Edit Delete Say what?

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