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JTAG security

Question asked by Jonas Karlsson on Jun 5, 2020
Latest reply on Jun 5, 2020 by gusarambula

Hello everyone,


We are looking at enabling JTAG security on the i.MX8QXP and there are two key fuses available: TrustZone KEY (Fuse Row Index 704-707) and OEM Key (Fuse Row Index 722-725).


I've been unable to find documentation regarding the difference between the two keys mentioned above and what J-tag capabilities are associated with each key. If someone would care to explain or point out relevant documentation, that would be great!


In application note AN12631 on how to authenticate a Lauterbach with secure JTAG enabled, a number of cmm scripts are referenced. Where can one obtain these scripts?