How to factory reset MIMXRT1020-EVK?

[VolcanicCheese]

How do I factory reset MIMXRT1020-EVK? I wanted to factory reset the board because my team made a custom PCB board with the same chip and it refuses to be programmed, so we wanted to compare the dev board with the custom pcb board in its initial condition.

[Alexis_A]

Hello @VolcanicCheese,

By default, the MIMXRT1020-EVK has only the blinky example that can be found in the demo_apps folder in the SDK but I doubt that using this example fix the connection problem with the board. Could you let me know how are you programming the board (SWD or serial downloader) and more details about this issue?

Best Regards,

Alexis Andalon

[VolcanicCheese]

I was trying to deduce what is the problem and what I figure out is that I do not fully understand how the jtag connection works for the dev board.The NXP 1020 chip does not have a JTAG_RTCK pin and the NXP 1020 Dev Board schematic shows the JTAG_RTCK signal is not connected to anything on the board. We are trying to program the NXP 1020 dev board via JTAG with minimal number of wires. However, JTAG programming via MCUxpresso only works if RTCK is connected. Why is the connection/disconnection of RTCK affecting the ability of MCUxpresso to program a chip that does not have an RTCK pin?"

[converse · Accepted solution]

Did you read this FAQ?

https://community.nxp.com/t5/LPCXpresso-IDE-FAQs/Design-Considerations-for-Debug/m-p/469565

Are you trying to use JTAG or SWD (SWD is recommended for minimum pin configuration)

[VolcanicCheese]

We are trying to use JTAG, and I will look into SWD thank you!