How to disable USB and JTAG by fuses on IMX8QM?

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How to disable USB and JTAG by fuses on IMX8QM?

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olivergraute
Contributor III

Hello,

how to disable USB Boot and JTAG by fuses on IMX8QM? The fusemap in iMX8QM_RM_Rev_F.pdf  gives no information about it.

Best regards,

Oliver  

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2 Replies

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olivergraute
Contributor III

Just for confirmation before I start to fuse from U-Boot I would try it this way: 

#JTAG Disable (SJC Disable) 

fuse prog -y 0 5 0x00000001


#USB Disable (USB1-1 Disable)

fuse prog -y 0 8 0x00000001

 

Best regards,

Oliver

 

 

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igorpadykov
NXP TechSupport
NXP TechSupport

Hi Oliver 

 

jtag disable "SJC Disable"  0x0850 [7:0] is described in Table 7-1. Fusemap - Supplementary Array

i.MX 8DualXPlus/8QuadXPlus Applications Processor Reference Manual

(the same for i.MX8QM, also additional file was sent via mail).

 

Best regards
igor

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