S32K312 Host debug disable

[RafalK]

According to HSE_B Firmware Reference Manual, Rev 2.1, 11/2022 it should be possible to disable Host debug:

3.6.3.3 Host debug permanently disabled
The host debug can be permanently disabled (i.e., closed) in LC states OEM_PROD and IN_FIELD by
programming the DCF records in the UTEST area. Refer to [S32K3xx Reference Manual] more details.

However S32K3xx Reference Manual does not mention exactly how this DCF record should look like, there is no such flag description.

Also in S32K3XX_DCF_client document there is no reference to such feature.

In HSE_B Firmware Reference Manual we have also:

OEM_PROD
IN_FIELD
Host debug protected (with ADKP) or permanently
disabled (see DEBUG_DISABLE)

but there is no reference to DEBUG_DISABLE anywhere.

Could you please tell me how DCF record for disabling debug pernamently should look like or direct me to specific document? 

[VaneB · Accepted solution]

Hi @RafalK 

For S32K3, it is not possible to disable debugging access. This only can be password-protected.

If you want more details, as the HSE information is under NDA, create a support ticket. 

B.R

VaneB