Disabling RTCK

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VolcanicCheese
Contributor III

When programming via JTAG, how do you disable RTCK in MCUxpresso? Page 85 of MCUxpresso IDE User Guide indicates it is possible to disable RTCK.

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converse
Senior Contributor V

1. Which chip are you using?

2. Why do you want to change?

Note the comment:

  • Note that RTCK (Return clock) is only used on older ARM cores (ARM7TDMI and ARM9 family) before the debug was properly decoupled from the core clock domain.

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converse
Senior Contributor V

1. Which chip are you using?

2. Why do you want to change?

Note the comment:

  • Note that RTCK (Return clock) is only used on older ARM cores (ARM7TDMI and ARM9 family) before the debug was properly decoupled from the core clock domain.
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VolcanicCheese
Contributor III

I am using a MIMXRT 1020 board I was confused on why connecting RTCK and not TCK with a minimum pin configuration allowed the JTAG connection to work. I was wondering if it was because RTCK was enabled. Thank you!

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