How SPI, I²C, UART Write to EEPROM Memory
Deep Dive: How I2C, SPI, and UART Write to EEPROM Memory (With Bit-Level Examples) EEPROM (Electrically Erasable Programmable Read-Only Memory) is the unsung hero of embedded systems. It bridges the gap between volatile RAM (which forgets everything when power drops) and Flash memory (which wears out quickly and requires erasing large blocks at once). EEPROM allows us to read and write data down to the individual byte level , making it perfect for storing configuration matrices, calibration coefficients, state machines, and user settings. However, an EEPROM chip cannot think for itself. It relies entirely on serial communication protocols to receive instructions. In this comprehensive guide, we will dissect exactly how the three industry-standard protocols— I2C , SPI , and UART —perform write operations to an EEPROM, detailing the exact sequences, hex payloads, and critical timing constraints. The Golden Rules of EEPROM Hardware Regardless of ...