# Rcw SB\_EN=1?

**URL:** <https://community.solid-run.com/t/rcw-sb-en-1/800>\
**Category:** NXP LX2160\
**Created:** [January 13, 2024, 1:38pm UTC](https://community.solid-run.com/t/rcw-sb-en-1/800 "2024-01-13T13:38:25Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![joema](https://avatars.discourse-cdn.com/v4/letter/j/a9adbd/32.png) [@joema](https://community.solid-run.com/u/joema)\
**Post date:** [January 13, 2024, 1:38pm UTC](https://community.solid-run.com/t/rcw-sb-en-1/800/1 "2024-01-13T13:38:25Z")

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In secure build, runme.sh has this part:

if [“x$SECURE” == “xtrue”]; then  
echo “SB\_EN=1” #\>\> RCW/template.rcw  
fi

which seems redundant? it seems there’s a comment in that line which makes the echo “SB\_EN=1” not actually add that line to the .rcw file?

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**Author:** ![jnettlet](https://dub1.discourse-cdn.com/flex005/user_avatar/community.solid-run.com/jnettlet/32/62_2.png) [@jnettlet](https://community.solid-run.com/u/jnettlet)\
**Post date:** [January 14, 2024, 7:38am UTC](https://community.solid-run.com/t/rcw-sb-en-1/800/2 "2024-01-14T07:38:11Z")

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That is a security measure so customers don’t inadvertently enable this without knowing what they are doing. That code is a template that can be enabled for customers that fully understand how to build and flash secure firmware to their LX2160a devices, including managing the secure regulator etc. Setting up secure boot on LX2160a is not trivial and it is very easy to brick your device.

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**Author:** ![joema](https://avatars.discourse-cdn.com/v4/letter/j/a9adbd/32.png) [@joema](https://community.solid-run.com/u/joema)\
**Post date:** [January 14, 2024, 8:33am UTC](https://community.solid-run.com/t/rcw-sb-en-1/800/3 "2024-01-14T08:33:10Z")

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Thank you!