I have a doubt I hope somebody can help me
I am thinking to add to my project using Arduino Mega 5V a DS3232 real time clock. I can see on data sheet some information about the MAX voltage for SCL SDA. I know I can connect directly to 5V the DS3231, But If I disconnect the VCC to work only with 3V battery cr2032 ...
My question is:
Will the I2C communication work? Because Arduino will use 5V and DS3231 3V. If not, why they add option to use battery, for MCU 3v3 ?