FCT (Functional Circuit Testing) and EOL validation for our i.MX8QXP-based platform.

Ram2 — Wed, 06 Aug 2025 12:29:52 GMT

Hi NXP Team,

We are currently working on FCT and EOL validation for our i.MX8QXP-based board.

As of now, we are using a USB-to-UART converter connected to the SoC to invoke AT commands for validating LTE, eSIM, GNSS, CPU, and PMIC via a serial interface from the host PC.

However, our final hardware setup includes a direct USB device mode interface, and we would like to understand:

Whether it is possible to use the USB interface USB-to-USB to directly send AT commands from PC to target,
What USB gadget,class driver would be best suited for this use case,
Any recommended way to expose a virtual serial port over USB to allow the host to send AT commands (similar to what’s done via USB-UART today)
Any caveats or limitations for using this method in mass production (EOL testing).

Please let us know your recommendations or if you foresee any challenges with this approach.

i.MX Processors中的主题 FCT (Functional Circuit Testing) and EOL validation for our i.MX8QXP-based platform.

FCT (Functional Circuit Testing) and EOL validation for our i.MX8QXP-based platform.