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i.mxRT1170 JTAG Not connecting issue

we are using Tool was MCU Expresso ,

J-link Plus Debugger we are using

Micro controller - MIMXRT1176AVM8A

Log file

J-Link>connect

Device "MIMXRT1176XXX8_M7" selected.

Connecting to target via SWD

Found SW-DP with ID 0x6BA02477

Failed to power up DAP

Error occurred: Could not connect to the target device.

For troubleshooting steps visit: https://wiki.segger.com/J-Link_Troubleshooting

24MHz External Crystal oscillator we are using it was working fine

Mode pins selected serial downloader.

internal DCDC we are using for our custom Board all voltages are working fine.

JTAG mod pin pull down with 4.7KE to GND

By Using Oscilloscope we observed TMS,TDI,TDO,TCK On board working fine

"But we couldn't connect to the Target"

kindly help me to sort out this issue

Re: i.mxRT1170 JTAG Not connecting issue

Hi @Harishnamala ,

Thank you so much for your interest in our products and for using our community.

1: Please use an oscilloscope to check if the power-up sequence is correct, paying attention that DCDC_PSWITCH requires an RC delay circuit, and the total RC delay should be 5 – 40 ms.

2：Please refer to MIMXRT1170HDUG chapter 5 Debugging and programming, it is about SWD/JTAG Pin Configuration

https://www.nxp.com/webapp/Download?colCode=MIMXRT1170HDUG

3: For SWD/JTAG debugging, the recommended mode is Internal Boot mode.

Wish it helps you.
If you still have question about it, please kindly let me know.

Best Regards
MayLiu

Re: i.mxRT1170 JTAG Not connecting issue

Hi @Harishnamala .

Thanks for your reply.

I suggest you can refer to this link below.

RT1050 SDRAM app code boot from SDcard burn with 3 tools

Normally, each community case is intended to address a single, specific issue. For your new questions, we kindly request that you create a separate community case to ensure proper tracking and resolution.

Thanks for your understanding and cooperation.

Best Regards

MayLiu

Re: i.mxRT1170 JTAG Not connecting issue

HI @mayliu1

we designed our custom board with mimxrt1176avm8a

now JTAG issue was cleared ,

we used in our custom board micron QSPI Flash, (Part number : MT25QL512ABB1EW9-0SIT TR) & SDRAM (Part number : MT48LC16M16A2P-6A IT:G) components, now we need to workout related that if you have any related documents kindly share . Kindly provide MCUEXPRESSO tool related procedure how to initialize this settings.

we are facing one issue in this process , while loading hello world program it was not entering to main function before only it was stopped.

Re: i.mxRT1170 JTAG Not connecting issue

Hi @Harishnamala ,

Thank you for sharing the detailed update and resolution.

I am very glade to hear that using the external PMIC and disabling the internal DCDC solved the JTAG detection issue.

Is there anything else you would like support with or any other questions regarding your design?

Best Regards

MayLiu