i.MX7 OTP

vraevsky — Wed, 01 May 2024 13:30:53 GMT

Dear NXP Support,

This question pertains to the cl-som-imx7 board.

According to the i.MX-7Dual reference manual, OTP Bank 14 (OCOTP_GPXX) can be used to store general-purpose data, but this only fits 16 bytes.

We would like to know if we could use any other banks/words for storing our own arbitrary data. Some potential options could be:

- Bank 15 is dedicated to some sort of CRC key, but is suffixed GP (OCOTP_CRC_GPXX)

- Banks 12-13 and Banks 24-29 are zeroed, but are not mentioned at all in the reference manual

Thanks in avances,

Valentin.

Re: i.MX7 OTP

JorgeCas — Fri, 03 May 2024 20:31:47 GMT

Hello,

The only fuse banks that are used for general porpoise are OCOTP_GP.

OCOTP_CRC_GP is used exclusively for Cyclic Redundancy Checking functions.

In the case of undocumented fuse banks you are referring, we do not recommend to read/write on them since we cannot determinate the behavior after do it.

Best regards.

i.MX Processorsのトピックi.MX7 OTP

i.MX7 OTP

Re: i.MX7 OTP