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DCSM - Password Lock

Robert Wolfe
Mastermind 7860 points


Hello,

I am reviewing the Password Lock capability of DCSM.  Is it true, that until Password Lock is enable, anyone could connect a JTAG to the target, and read the password values?  So they could unlock the device and have free access.  Without Password Lock, it is almost like there is no code security at all?

Regards,

Robert

  • 0
    TI__Guru** 115881 points

    Robert,

     Is it true, that until Password Lock is enable, anyone could connect a JTAG to the target, and read the password values?  So they could unlock the device and have free access.  Without Password Lock, it is almost like there is no code security at all?

    That is correct. User have to enable password lock to secure the zone.

    Regards,

    Vivek Singh

  • 0 in reply to Vivek Singh
    TI__Guru** 115881 points

    Just to clarify further, even though PSWDLOCK is disabled (not programmed) zone will be secure for user development. This feature was added so that during development if user by mistake programs wrong passwords then they can read the password and use it to unlock to recover else they have to change the device on board. But after development user must enable the JTAGLOCK so that no one can read the password.

    Hope this is clear.

    Regards,

    Vivek Singh

  • 0 in reply to Vivek Singh
    Mastermind 7860 points

    Yes, clears, thanks.

    Robert