If you only want read and write Eeprom of MCU you could use UPA, if MCU unsecured. I think in this case it is unsecured.
But as you want to read and write Flash + eeprom of this MCU I recommend you to desolder MCU and use ETL Programmer to make this job.
I always use ETL and it works perfect. ETL will work on secured and unsecured MCU´s.
If helped please press Thanks + Reputation
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