36.5.3.10 “Hardware” Protections

The User area can be protected against read accesses and/or modifications.

To enable the different protections of the User area, the User Configuration special packet must be programmed. The packet is described in the OTPC_UHCxR registers.

As an example, to disable the JTAG interface for an indefinite period, the JTAGDIS, UHCINVDIS and UHCPGDIS fields of the User Hardware Configuration special packet must all be programmed to a non-zero value. Thus, it will be impossible to update or invalidate the User Hardware Configuration special packet.