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JAN R
JAN R
Associate III
April 29, 2019
Question

Does the ST plan Eeprom emulation for STM32G0x0?

  • April 29, 2019
  • 4 replies
  • 1375 views

Dear,

I would like to use STM32G0x0 mcu for my new project, but the eeprom is missing. How to emulate the eeprom from flash? I supose the solution will be different from the STM32Fxx series.. Is not it?

Best Regards, Jan.

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4 replies

Tesla DeLorean
Tesla DeLorean
Guru
April 29, 2019

Honestly, how hard is it to manage a couple of 2KB Flash pages to store the data/structures you need?

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JAN R
JAN RAuthor
Associate III
April 30, 2019

I do not know, but I have experience with asf lib. from Amel (SAMD21 M0+) and I know there were not so clear steps for saving data to flash... Fro example Lib.c for emulate eeprom has 977 lines of code

Ozone
Ozone
Principal
April 30, 2019

I hope you are aware of the compromises you make with an EEPROM emulation, instead of EEPROM.

kurta999
kurta999
Senior
April 30, 2019

I rather would be interested in real EEPROM, it only present in L0 series AFAIK. Does anybody know anything about real EEPROM in future chips, or I can forget that?

Ozone
Ozone
Principal
April 30, 2019

You would have to ask ST. It is all a matter of sales price vs. use cases. The 16/32 bit wide erase/program capability and the increased durability (erase cycles) come at a price, which a number of large-scale customers is not willing to pay.

Since the EEPROM erase/programming times are in the millisecond range as well, external serial EEPROMs are an option with little timing/code overhead.

Andreas Bolsch
Andreas Bolsch
Lead III
April 30, 2019

On the register interface level, the G0's flash controller is (almost) identical to the L4's. It should be fairly straightforward to port x-cube-eeprom and AN4894 to the G0 family.

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