9.4.5.3 Write Fuses

The fuses may only be programmed, that is written from one to zero. The write fuses operation is allowed only after successfully presenting the secure code (Write 7 password). The fuses must be blown sequentially:

1. FAB must be blown first.
2. CMA may be blown only if FAB is zero.
3. PER may be blown only if CMA is zero.