S12ZVL EEPROM emulation

[eunsangcho]

Does anyone know about EEPROM emulation for S12ZVL?

There's some problem and limitation to use PFLASH as EEPROM.

I only could find the document for Qorriva, but there's no sample code or driver.

https://www.nxp.com/docs/en/application-note/AN4868.pdf 

Thank you.

[danielmartynek]

Hi,

There is EEPROM (128 - 2048B) on S12ZVL.

Do you need to emulate additional EEPROM?

Regards,

Daniel.

[eunsangcho]

Hi Daniel.

I'm using 12ZVL32F that has 128byte EEPROM.

It's not enough space to satisfy our specification .

To satisfy our specification, I need additional space. 

But, there's limitation to use PFLASH as EEPROM as you know.

I found this similar solution to another device Qorivva. 

https://www.nxp.com/docs/en/application-note/AN4868.pdf 

And, I want to know if there's driver and documentation for the MagniV about EEPROM emulation.

Thank you.

[danielmartynek · Accepted solution]

Hi,

I’m afraid there is no such driver for MagniV MCUs.

There are drivers for S12C32/S12XS/S12P MCUs which do not have EEPROM.

AN2302 EEPROM Emulation for the MC9S12C32

AN2302SW

AN3961 EEPROM Emulation for the MC9S12XS and MC9S12P Families Using AN2302 as a Reference

AN3961SW

You might use the drivers as a reference.

Unfortunately, that’s all we have.

Regards,

Daniel