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Can iMX6Solo OTP be accessed via JTAG?

Question asked by Bogdan Baudis on Apr 10, 2017
Latest reply on Apr 12, 2017 by Bogdan Baudis

The chip is i.MX6Solo.

Is it possible in principle to operate OCOTP (set/clear eFuse) via JTAG?(Using Debug Access Port memory access)

I tried to do that using Lauterbach however it appears that access to OCOTP_CTRL is "locked". However I cannot find by what locks it (at least relaying on the "shadow registers" of OTP, which Lauterbach can read).

See what I can read in the attachment (screen capture of Lautrebach's TRACE32 OTP view).

Is the only way to operate OTP by executing a program?

 

Thank you,

   Bogdan Baudis

   Cambridge Consultants

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