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IMX6UL burn eFuses from JTAG

Question asked by Alberto Lubeiro on Feb 4, 2016
Latest reply on Feb 9, 2016 by Yuri Muhin

Hi all,

 

I am working with MCIMX6UL-EVK and i want to burn an eFuse, specifically "UART Serial Download" which is 0x470[4].

I connect with the board via JTAG and i am able to modify other registers however i can´t modify this eFuse.

 

Anybody knows if this is posible with JTAG? or may i do something before modifying the eFuse?

 

We can't load any zimage or app because we can't make USB work, due to some issues we have with UART. The target of burning this eFuse is to disable uart detection so the USB is the first option in serial downloader mode. Then, i belive the PC will detect the board as HID unit.

 

Please any help will be apreciated.

 

Thanks and best regards

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