i.MXRT 1052 Debug Error: Failed to execute MI command if I use the GPIO1.25 pin

[Elsa_7561]

Hi,

I have meet a wired issue. I use MCUXpresso IDE V11.5.1 on windows 10 PC with Jlink Plus debug tool and NXP MIMX1052CVL5B as a target. I load a SDK example and modify the configuration to use the Jlink's flash driver. and it works and I could load my code to my target successfully. but once I config the M13 pin(GPIO1.25) as GPIO output. I will get an issue as below, I could not load/debug my project. and if I remove the GPIO1.25 configuration, I will load/debug my code sucessfully. so does anyone else meet the issue? need your help.

and console log as below, more info as attched txt.

Note: my HW as below. and my SW package as attached.

Note: at present, I remove the R284 & R281.

[Elsa_7561]

Thanks for your reply. and I found the reason. I have configed the clock source as 01-loopback from DQS pad mode, that why I can't config the M13 pin as GPIO feature.

[jeremyzhou · Accepted solution]

Hi,
Thank you for your interest in NXP Semiconductor products and for the opportunity to serve you.
For QSPI Flash as XIP function, to achieve the highest performance it is recommended to leave the FLEXSPI_A_DQS pin floating and configure the sample clock source as 01-loopback from DQS pad mode to achieve max 133MHz Flexspi_clk. Besides, it is also recommended to pull up QSPI flash
pin1(CE) and pin7(hold) to make sure QSPI Flash boot-up stability
Have a great day,
TIC

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