Arduino wire library multiple bytes8/12/2023 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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