Problems Getting EM9191 Working with M.2 to USB Adapters

[jyijyi]

did you also check pin22 for VBUS_SENSE?

EM9190: Suggested Adapter?

I finally found an adapter that you can buy off-the-shelf that will allow this to work via USB! This is the ONLY one I’ve found. If you look at the block diagram of it, found on the documentation on their website, it says that they connected a pull-up resistor to pin #20 (PCIE_DIS) which sets the pin to high (1.8V), enables the USB interface, and disables the PCIe interface. http://www.hwtools.net/Adapter/UN32A.html#Web-shop

EM9191 not found in LattePanda3Delta m.2Bkey slot

We also tried a wide variety of adapter boards with no luck. EM9191 still works great in the Sierra DevKit board. Tried adding pullup to 1.8V on the adapter boards too. I measured the various signals and have not yet found the issue. I have built a schematic using the devkit manual schematic. Do you have any more suggestions? Is there a reference design package to make our own PCB?