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RT1020 - Fuse shadow registers

Question asked by rshipman on Jul 3, 2020
Latest reply on Jul 7, 2020 by Victor Jimenez



I just want to confirm some things regarding the OCOTP shadow registers please:


1. Can I just read and write to the OCOTP shadow registers (0x401F4400 - 0x401F46F0) at will, and the efuses will NOT be changed?


2. Are the contents of these shadow registers lost at reset because they are reloaded with the actual efuse values? In other words these shadown registers are effectively volatile like normal registers?


3. If so, does that mean the SRK efuses have to be burned so that signed/encrypted boot works?


Thanks and regards,