Using MCU Link (UART) to burn eFuse with MCU Boot Utility

VolcanicCheese — Tue, 01 Mar 2022 00:04:33 GMT

Hey @diego_charles, I tried everything I could think of using the MCU Link w/ (LPUART1 ports) to burn eFuse with MCU Boot Utility with the board in Serial Downloader mode. The goal is to burn the eFuse to boot up in internal boot mode when doing boot by fuses. This is a continuation of this forum post: https://community.nxp.com/t5/i-MX-RT/Trouble-flashing-custom-board-designed-based-on-the-1020-Eval/m-p/1416225#M18420

This is my current setup:

I am using a power supply to provide power through the Vin pin. I saw a post about taking out jumpers for j25 and j26 for debugging through UART. I tried taking out (j25, j26), (j27, j28), (j25, j26, j27, j28) and keeping the default jumper set up. I tried switching the UART pins meaning switching the RX and TX pins. Also, I made sure to update the firmware of the MCU Link and when I press debug it detects the debug probe.

Question I was wondering what I am doing wrong when using the MCU Link w/ (LPUART1 ports) to burn eFuse with MCU Boot Utility with the board in Serial Downloader mode?

Using MCU Link (UART) to burn eFuse with MCU Boot Utility

jeremyzhou — Tue, 01 Mar 2022 03:19:28 GMT

Hi，

Thank you for your interest in NXP Semiconductor products and for the opportunity to serve you.
Firstly, the Vin should be 5 V, then, the UART pin should choose the below pins.

In addition, don't forget to configure SW8 to 0001.
Last, I'm a bit confused about why you use such a complicated connection, you can use a USB cable to plug in the J23, it not only supplies the board but also integrates the serial port feature.
Have a great day,
TIC

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Using MCU Link (UART) to burn eFuse with MCU Boot Utility

Using MCU Link (UART) to burn eFuse with MCU Boot Utility