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how to fuse JTAG_SMODE (secure jtag mode)

Question asked by MyungJin Hwang on Mar 17, 2015
Latest reply on Mar 27, 2015 by Wilson Hung

I have some questions...about secure jtag mode


My development board is a IMX6 Sabrelite(boundarydevices).


I don't know how to configure secure jtag mode.

     00 - JTAG enable mode (Default)

     01 - Secure JTAG mode

     11 - No debug mode


searched below files but can not find out it.

     - Configuring Secure JTAG for the i.MX 6 Series Family of Applications Processor.pdf

     - i.MX 6Dual_6Quad Multimedia Applications Processor Reference Manual (REV B).pdf


in the Secure JTAG doc, i could see "/sys/fsl_otp/HW_OCOTP_CFG5"> Burn JTAG_SMODE =01 fuse</CMD>".

but i also find out "echo 0x2 > HW_OCOTP_CFG5" command to configure SEC_CONFIG to close mode in how to enable hab doc.

Then both use same HW_OCOTP_CFG5 bit...

please help me.