i.MX Processors中的主题 Re: JTAG Interface in iMX7 processor

JTAG Interface in iMX7 processor

borisberman — Sun, 24 Nov 2019 09:29:09 GMT

Hello,

Our client has the following question about JTAG Interface in iMX7 processor:

"For security reason, we want to disable JTAG Interface in the release build.
Can you please help me with the register and bank details for the same?

So that i can configure it DISABLED one time in the uboot OTP fuse prog."

In the i.MX7 Reference manual sec. 4.12.6 described 3 JTAG security modes, but I could not find a specific eFUSE (eFUSE address/number) and a value for it that sets the JTAG interface in Security Mode #1: No Debug-Maximum Security.

Thank You,

Boris

Re: JTAG Interface in iMX7 processor

igorpadykov — Sun, 24 Nov 2019 23:21:19 GMT

Hi Boris

one can look at fuse SJC_DISABLE in Table 6-19. Fusemap Descriptions p.1103

i.MX 7Dual Applications Processor Reference Manual
and description in AN4686 Configuring Secure JTAG
https://www.nxp.com/docs/en/application-note/AN4686.pdf

Best regards
igor
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