I have an ecu here 8D0 907 557N, the eeprom is a bit different than I expected to see and after much searching can't really find a definitive answer to it.  Where I would expect to see an A0 for the immo on there is F0 instead. 

Couple of questions, how come there is F0 there when all i have ever seen before is A0 and secondly if it does, do I correct the F0 to 50 for immo off do I then correct the check sum by A0?

I have attached the 24c02 dump

Many thanks in advance.