Using JTAG with LPC LINK-2 on MIMXRT1050

[tusharvan]

I want to debug MIMXRT1050 by using JTAG. Currently, I can debug it with LPC LINK-2 by using SWD. The option to choose JTAG in Debugger options->Debug connections in MCUXpresso IDE v10.2.1_795 is disabled.

How can I enable the JTAG option or am I missing some other setting. 

-Tushar

[lpcxpresso_supp]

I'm not sure why you think JTAG is faster. In our experience where an MCU support both mechanisms for debugging operations, the opposite is generally true.

Regards,

MCUXpresso IDE Support

[tusharvan]

I understand SWD is superior to JTAG but surprisingly SWD is slower on this processor compared to my earlier experience with it. It takes a while to step debug even one instruction.

Just to answer my question, do I need to blow a fuse(DAP_SJC_SWD_SEL) to enable DAP in JTAG mode?

Expecting a positive response.

[lpcxpresso_supp]

Can you explain why you want to do this? Generally even when debug is possible via JTAG, using SWD is preferable.

Regards,

MCUXpresso IDE Support

[tusharvan]

Debugging via JTAG is comparatively faster. Debugging using SWD takes considerable time to execute even a single instruction. And yes, I have tried disabling cache as suggested in one of the forum posts.