It seems that the Cortex-M3/M4 controllers with EEPROM are being phased out. Is there a reason for this and what are the recommended alternatives?

[waclawek.jan]

AFAIK only the 'L0 and 'L1 famiilies have what ST calls EEPROM, i.e. no Cortex-M4-based STM32.

The STM32L1xx family, while NRND, is still under the 10-year commitment, so they should be around for some time.

The alternatives are

• use RAM with battery-backup
• use external EEPROM or any similar technology (e.g. FRAM)
• use the FLASH in a fashion emulating EEPROM

Optimal choice is given by particular requirements of given application.

JW

[Tesla DeLorean]

Probably because the structures are large and hard to manufacture, and don't scale well into new processes?​

T​he goal is to make small low cost general purpose MCU, with high wafer yields, easy to test, and not to combine specialized and incongruant technologies.

[Tesla DeLorean]

The preferred method would be to use a RAM technology that is sustained with a battery or supercap at very low currents​

[WojtekP1]

Use flash and just invent something to spread wear right for your use case.