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Programming eFUSE bits on VisionSOM-6ULL

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Programming eFUSE bits on VisionSOM-6ULL


NOTE! The described operation may be performed only once and cannot be reversed!

This article describes the programming eFUSE on VisionSOM-6ULL with VisionCB-6ULL-STD. It requires the UUU tool that may be downloaded from .

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:
fuse prog -y 0 5 0x2840
fuse prog -y 0 6 0x10
  • Command to configure VisionSOM6ULL to boot from on board eMMC memory:
fuse prog -y 0 5 0x2860
fuse prog -y 0 6 0x10

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 archive.