Date added: December 26, 2019
Affected Products: PICO Compute Modules , PICO-IMX6 , PICO-IMX6UL , PICO-IMX7 , PICO-IMX8M , PICO-IMX8M-MINI
NOTE: In order for this to work properly, TechNexion SOMs have to be plugged into TechNexion baseboards.
1. Connect debug console, power, and data cables to the baseboard
Yellow box: debug console cable
Red box: power cable (Note: some boards are powered using USB Type-C cable)
Blue box: data link cable
|PICO-IMX8M PI||PICO-IMX8M-MINI PI|
|PICO-IMX6 PI||PICO-IMX6 NYMPH|
2. Use UUU (mfgtool) to write the rescue loader image to eMMC on SOM
Set the boot jumpers to Serial Download Mode
First, you need to set the boot jumpers on your baseboard so that the board is booting into Serial Download Mode. Follow this Knowledge Base guide in order to set the boot jumpers into Serial Download Mode (i.e. the purple box in the pictures above)
Download UUU (mfgtool)
Download the UUU tool from our website:
Unzip the package
After you download it, you will need to unzip the package:
$ unzip imx-mfg-uuu-tool_20200327.zip
If you are using a Linux-based host, by default files unpacked using unzip are not executable. You may need to set the execute flag on the ‘uuu’ binary in order to execute it (run it).
$ cd imx-mfg-uuu-tool
$ chmod +x uuu/linux64/uuu
Download a default factory rescue loader for your board
The following table lists the URLs based on the SOM and baseboard you are using. Please make sure to correctly identify the board you have.
|PICO-IMX6||PI: ftp://ftp.technexion.net/factory_default_reset/pico-imx6/pi-lcd800x480/rescue.xz||PICO-IMX6||NYMPH: ftp://ftp.technexion.net/factory_default_reset/pico-imx6/hymph-hdmi/rescue.xz|
Unpack the rescue loader binary image
After download, you’ll need to unpack the rescue loader binary from the “xz” archive. This results in a file named “rescue” in the current directory, and the archive file (rescue.xz) is deleted.
$ unxz rescue.xz
Note that if you directly write the archive file (“rescue.xz”), the process may appear to complete successfully, but in fact this is quite incorrect and the board will not boot. ‘uuu’ is smart enough to look into .bz2 archives, but not .xz archives.
Write the rescue loader image to EMMC
This assumes that you are in
For Linux Platforms:
|Different instructions to flash image into eMMC|
For additional information, please see the Knowledge Base guide: https://www.technexion.com/support/knowledgebase/using-uuu-to-flash-emmc/
3. Set the boot jumpers back to boot from eMMC and reboot
You should be presented with the rescue loader UI.
NOTE: On pico-imx6-pi, please ensure that the lcd panel and touch cable are connected correctly before booting into rescue loader