View source for Programming eFUSE bits on VisionSOM-6ULL

{{PageHeader|Programming eFUSE bits on VisionSOM-6ULL}}

This article describes the programming eFUSE on VisionSOM-6ULL with VisionCB-6ULL-STD.

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|'''NOTE!''' The described operation may be performed only once and cannot be reversed!
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= Programming iMX6ULL OTP fuses with u-boot =
If board is already programmed, stop it during boot in u-boot bootloader by pressing a key when prompted.

To write fuse, use one of the following u-boot commands:

* Command to configure VisionSOM-6ULL to boot from on board uSD card:
<pre>
fuse prog -y 0 5 0x2840
fuse prog -y 0 6 0x10
</pre>

* Command to configure VisionSOM6ULL to boot from on board eMMC memory:
<pre>
fuse prog -y 0 5 0x2860
fuse prog -y 0 6 0x10
</pre>

If device is not programmed yet, you can use serial download mode, as described here: [[Writing_VisionSOM-6ULL_system_image_to_eMMC_memory]] and then program fuses.

= Programming iMX6ULL OTP fuses with UUU tool =

It is also possible to program OTP fuses via NXP manufacturing tool (uuu)
For details see the manual in attached [[Media:somlabs-visionsom-efuse-flasher.zip|archive]].