The Arduino Mega is a microcontroller board based on the ATmega1280 (datasheet). It has 54 digital input/output pins (of which 1
GitHub - MCUdude/MegaCore: Arduino hardware package for ATmega64, ATmega128, ATmega165, ATmega169, ATmega325, ATmega329, ATmega640, ATmega645, ATmega649, ATmega1280, ATmega1281, ATmega2560, ATmega2561, ATmega3250, ATmega3290, ATmega6450, ATmega6490 ...
![How to make use of Interrupts on pins 20 & 21 of a Mega when using an I2c LCD - Project Guidance - Arduino Forum How to make use of Interrupts on pins 20 & 21 of a Mega when using an I2c LCD - Project Guidance - Arduino Forum](https://europe1.discourse-cdn.com/arduino/optimized/4X/a/9/2/a928bd37ef900793b11bba61eafe3f98166a7f12_2_500x355.png)
How to make use of Interrupts on pins 20 & 21 of a Mega when using an I2c LCD - Project Guidance - Arduino Forum
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