56.4.5.3 Fuse Masking

It is possible to mask a fuse array. Once the fuse masking is enabled, the data registers from SFC_DR0 to SFC_DR7 are read at a value of ‘0’, regardless of the fuse state (the registers that are masked depend on the SFC hardware customizing).

To activate fuse masking, the MSK bit of the Mode register (SFC_MR) must be written to level ‘1’. SFC_MR.MSK is set-only. Only a hardware reset can disable fuse masking.

SFC_MR.MSK has no effect on the programming of masked fuses.