Tmc2208 how otp work?

Hello there.
I've 2 of this driver for X and Y.
I can't control it from marlin,cause I've a gt2560 rev3

Anyway...I can control it with FTD chip usb serial converter,and the program from watterott.

Well...I can't understand how otp work.Ive read the datasheet but is not clearly enought
I don't know what registers I can write,and if I can, can write only the params 1????
For example,I wanna threshold for spreadcycle set to 75...How can do it?

And I cannot find a valid source,where is well explained.
Someone wanna help or illuminate me?
Thanks

No one here too? ☹️☹️☹️

So I'm not the only one that cannot understand it fully

It's very strange that no one can understand what datasheet mean.
I think write to trinamics, for know what and how, i can program this dammed otp