STM32L051K8 writing half page to EEPROM?

[MSipo]

I'm using an STM32L051K8. I'm writing words to EEPROM. It takes a lot of time to do that. I read in the datasheet that it is possible to do a half-page write that will take the same amount of time as a single write.

 

How do I write a half page? Do I use the PROG bit and the FPRG bit?

 

Could someone share an example?