Hi st frends:
Yestarday I fuse the OTP PKHTH as follow
But today I found the key I fuse is not the correct one. So I want to re-fuse the OTP ，it seems that can't no fuse again. is there any way to fuse the OTP this situation?
Accepted Solutions
unfortunately, this is not possible.
on upper OTPs (31 to 95), trying to program a different value will likely make the platform bricked as embedded ECC protection cannot be correct as well (as fused bits cannot be cleared).
On lower OTPs (0 to 31), you could only sets new bits to '1', but once set, a bit cannot be cleared (this is intrinsic to the fuses).
Refer to reference manual
Regards.
unfortunately, this is not possible.
on upper OTPs (31 to 95), trying to program a different value will likely make the platform bricked as embedded ECC protection cannot be correct as well (as fused bits cannot be cleared).
On lower OTPs (0 to 31), you could only sets new bits to '1', but once set, a bit cannot be cleared (this is intrinsic to the fuses).
Refer to reference manual
Regards.
From that page, you could see
0x10000000 is "Shadow write sticky lock"
0x50000000 is "Shadow write sticky lock" + "Permanent write lock"
Regards.
