How to disable JTAG to protect the access.x`

[Venkatesh P]

HI Team,

Do MCU has provision of disabling the JTAG after production to stop Unauthorized access?

Regards,

Venkatesh

[Turbo J]

Yes and no.

There is APROTECT in UICR, but there is also a bug report about its behaviour IIRC. Not sure if the latter is included in the errata sheet.

[Sigurd]

Hi,

You write to the APPROTECT register to enable APPROTECT. See this link. You can use nrfjprog to enable it using the command --rbp ALL