Hello @gatadivijay ,
CRP is not a STM32 term. I guess you mean RDP. :)
The RDP mechanism is no more available on STM32H5 and was replaced by PRODUCT_STATE.
There is no RDP level 1 equivalent (Set RDP1 and have the possibility to come back to RDP0 with a regression)
With PRODUCT_STATE, the normal way to protect flash is to switch to CLOSED state.
To be able to re-open the device through a regression mechanism you should have first provisioned a password.
To re-open the device you need to provide this password to the programmer.
The programmer uses a Debug Authentication mechanism to make sure you have the same password as the one previously provisioned.
You can check the wiki here
Also a video explains how it works. This is the video 08 from the workshop here
Best regards
Jocelyn
