10-16-2019 07:52 AM
10-17-2019 08:26 PM
You cannot shift a value into DNA_PORT as the value in it is pre-programmed and yes, its preserved. You can only read it out.
You can find more details about this value in UG470.
10-18-2019 08:17 AM
Both the 7 Series FPGAs Configuration User Guide and the 7 Series Library Guide very clearly state that user data can be shifted into the DNA_PORT primitive. See images below. So I repeat: is the shift register content preserved through a device reconfiguration?