How to Read/Write eFuses in J-Link commander?

[burns_wayne]

Hi,

I’m using a J-Link to program a NXP MCIMXRT1052 chip, and need to program/blow some of its eFuse registers.

However, I've troubles even reading the eFuse registers, let along writing them, in J-Link Commander.

According to Table 5-9 in the MCIMXRT1052 datasheet, register at 0x420 should contain Unique ID of the chip. However, when I do a "mem 420,10" command in J-Link Commander, to read the content at the 0x420 address, it just returns a bunch of neatly count-up numbers, just like all other eFuse registers, which can't be right. (Please have a look at the attached screanshot below)

Have I just typed in a wrong address? or where else could have gone wrong?

Cheers

Larry

[jay_heng]

You can try this tool to read fuse

GitHub - JayHeng/nxp-sec-boot-ui: A one-stop GUI tool to work with NXP MCU (Kinetis, i.MXRT, LPC) RO... 

[igorpadykov]

Hi Larry

one can try example from below link and implement it with jlink:

How to burn BT_FUSE_SEL on RT1050 

Best regards
igor
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