Facing issue while fusing the SOM

balasubramaniyam — Fri, 04 Oct 2019 06:27:12 GMT

Hi,

I'm using i.MX6 SOLO SOM. And I'm trying to fuse the SOM by using the below command.

CFG4: (eMMC fuse)
echo 0x4060 > /sys/fsl_otp/HW_OCOTP_CFG4

CFG5: (BT_FUSE_SEL)

echo 0x10 > /sys/fsl_otp/HW_OCOTP_CFG5

When I fused CFG4 and read I get the same value which I was written. But when I fuse the CFG5 and read I get the wrong value.

$ echo 0x10 > /sys/fsl_otp/HW_OCOTP_CFG5

$ cat /sys/fsl_otp/HW_OCOTP_CFG5

0x1

These issue only occurs in 10 out of 100 SOM in a same slot.

Hoping for better guidance.

Thanks and Regards,

Bala

Re: Facing issue while fusing the SOM

igorpadykov — Fri, 04 Oct 2019 10:04:46 GMT

Hi Bala

issue may be caused by incorrect power-up sequence, one can recheck it using

datasheet and hardware user guide

i.MX 6Solo/6DualLite Applications Processors for Consumer Products

IMX6DQ6SDLHDG, Hardware Development Guide for i.MX 6Quad, 6Dual, 6DualLite, 6Solo Families of Applications Processors

also one can try to program fuse in uboot https://community.nxp.com/docs/DOC-95458

Best regards
igor
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i.MX ProcessorsのトピックRe: Facing issue while fusing the SOM

Facing issue while fusing the SOM

Re: Facing issue while fusing the SOM