10/14/2023 0 Comments Arduino wire library multiple bytes![]() One of the advantages of EEPROMs is their compact design. In short, an EEPROM serves as a memory for data that should not be lost even after the power supply has been switched off. This somewhat contradictory name has evolved historically. The abbreviation EEPROM stands for “Electrically Erasable Programmable Read Only Memory”. They are so different from the I2C based EEPROMs that I couldn’t fit both in a single post. In a separate post I introduce the external SPI based EEPROMs. Pinout and connection to the microcontroller.For a better understanding, however, it is also worthwhile to learn how this works without a library. With suitable libraries, such as the one from Sparkfun, you can write and read the EEPROMs very conveniently. In this article I will focus on the external I2C controlled EEPROMs. ![]() In my last post I had explained the use of the internal EEPROM of the AVR microcontrollers or the AVR based Arduino boards.
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