EEPROMlignende

EEPROMlignende describes memory devices and configurations that behave similarly to EEPROM (electrically erasable programmable read-only memory). Such devices provide non-volatile storage of small data that must survive power cycles, and they are typically byte-addressable or appear as a memory region accessible by a microcontroller. In practice, EEPROM-like behavior is achieved by true EEPROM devices, by flash memories with EEPROM emulation, or by other non-volatile memories that expose an EEPROM-style interface.

Common implementations include true EEPROM memories (I2C or SPI based, such as 24C02, 25AA512) that allow byte-level read and write operations, and flash memories that emulate EEPROM by mapping small persistent registers into a host-visible area, sometimes with wear leveling and page-based erase. The latter is common in microcontroller peripherals where limited flash space is used to store configuration data. Access interfaces typically include serial protocols (I2C, SPI) or parallel interfaces in larger devices. Endurance varies: true EEPROMs are rated for tens of thousands to a few million write cycles, while flash-based emulation adds overhead and can reduce apparent endurance.

Applications include storing calibration constants, device configuration, security keys, and other non-volatile parameters that must be preserved when power is removed. Designers must consider data integrity on power loss, write latency, and wear, often using redundancy, checksums, or journaling to mitigate risks.

Limitations: EEPROMlignende is not a single standardized class; it is a descriptive term for EEPROM-like behavior across technologies, with specific devices differing in endurance, capacity, and interface.