iMX8QM Fuses programming

[fmonte]

Hello,

from the iMX8QM reference manual and SCU FW porting manual it is not clear:

1. Is the programming of single-bit registers and word registers done in the same way? That is, the single bit OTP registers can be programmed multiple times?
   
   
   
   
   
2. How to do shadow OTP programming? The manuals do not mention how to do that.

Thank you,

Francesco

[igorpadykov]

Hi Francesco

>Is the programming of single-bit registers and word registers done in the same way?

>That is, the single bit OTP registers can be programmed multiple times?

in both cases fuses can not be programmed multiple times. For examples one can look at

https://imxdev.gitlab.io/tutorial/Burning_eFuses_on_i.MX8_and_i.MX8x_families/

>How to do shadow OTP programming? The manuals do not mention how to do that.

one can look at sect.13.11 On-Chip OTP Controller (OCOTP_CTRL), that is write data

to appropriate register:

i.MX 8QuadMax Applications Processor Reference Manual

Best regards
igor