I am having difficulty using a j-link mini to flash the bootloader on a Seeed Arch Mix development board (MCIMXRT1052QSPI).

I am a hobbyist that is fairly new to working on hardware.

I am following directions provided by Seeed to update the bootloader to Arduino using J-Link.
(wiki.seeedstudio.com/Arch_Mix/…no-bootloader-to-arch-mix)

I get to the point of flashing the new bootloader in J-Flash and it fails to connect to the target board.

Here is the full log from J-Flash.

Application log started
- J-Flash V7.22b (J-Flash compiled Jun 17 2021 17:23:09)
- JLinkARM.dll V7.22b (DLL compiled Jun 17 2021 17:22:49)
Reading flash device list [C:\Program Files (x86)\SEGGER\JLink\ETC/JFlash/Flash.csv] ...
- List of flash devices read successfully (451 Devices)
Reading MCU device list ...
- List of MCU devices read successfully (8512 Devices)
Creating new project ...
- New project created successfully
Opening data file [C:\Users\bcc\Documents\Arduino\Arch Mix\bootloader.hex] ...
- Data file opened successfully (39360 bytes, 1 range, CRC of data = 0x805A496A, CRC of file = 0xB416A8BD)
Connecting ...
- Connecting via USB to probe/ programmer device 0
- Updating firmware: J-Link EDU Mini V1 compiled Jun 17 2021 16:46:54
- Replacing firmware: J-Link EDU Mini V1 compiled Feb 4 2021 13:01:48
- Waiting for new firmware to boot
- New firmware booted successfully
- Probe/ Programmer firmware: J-Link EDU Mini V1 compiled Jun 17 2021 16:46:54
- Device "MCIMXRT1052QSPI" selected.
- Target interface speed: 4000 kHz (Fixed)
- VTarget = 0.000V
- ERROR: Failed to connect.
Could not establish a connection to target.


I believe my issue is in my wiring between the j-link and the Arch Mix board.

The wiki instructions states:
Connect J-Link's SWD pins to Arch Mix's SWD Pins.
DIO to DIO
CLK to CLK
GND to GND

I used the provided j-link ribbon cable to make a small harness that allows me to connect the j-unit to a breadboard for these 3 connections.
I checked the pinout on both devices and believe I have them mapped correctly.
I have verified continuity in the connections between the boards.

J-Link Ribbon Pin #2; SWDIO ==> Arch Mix DIO Pin J420
J-Link Ribbon Pin #3; GND ==> Arch Mix GND Pin J421
J-Link Ribbon Pin #4; SWCLK ==> Arch Mix CLK Pin J419

Is there anything obvious that I am missing?
Is the "VTarget = 0.000V" an issue?
Do I need to connect the j-link VTRef pin to 3.3v on the board?

Thanks,
Carmon Colvin

I found my problem, it was the missing VTarget value.

After connecting J-Link Ribbon Pin #1; VTref ==> Arch Mix 3v3 Pin J422 I was able to flash the bootloader.

I was hesitant to make the connection since it was not in the instructions and I know just enough to be dangerous with development boards.