topic can i use jtag_mod as gpio,and use swd debug in i.MX RT Crossover MCUs

can i use jtag_mod as gpio,and use swd debug

ccc_clive — Wed, 12 Jun 2024 07:06:08 GMT

current,the jtag_mod pin is only pull down to gnd, and no other function.But i want to use this pin as gpio,because no any more pin can use.I do not know the jtag_mod function is check at power on or at debug and download.Is this pin can used as gpio,and use swd debug.

回复： can i use jtag_mod as gpio,and use swd debug

Gavin_Jia — Wed, 12 Jun 2024 10:09:30 GMT

Hi @ccc_clive ,

Thanks for your interest in NXP MIMXRT series!

Unfortunately, that's not allowed. While we call the signal JTAG_MOD, it will still affect SWD function. So if you want any debugging capability (JTAG or SWD), then we should tie that signal to ground and not try to use it as a GPIO.

Best regards,
Gavin