We are trying to use an external eMMC memory to work with the Jetson. During development, this has to be tested of course. As described in the Product Design Guide of the Xavier NX in Chapter 9 there are two SDIO interfaces. One for the internal eMMC and another one for your use (cite: “brings one to the connector pins for SD Card or SDIO use”)
As of my understanding, this means an SDIO interface can be utilized by the user, is that correct?
It appears that the SDIO interface is not available in the GPIOs of the NX DevKit. Which raises the question, how is one supposed to develop something using the SDIO if it is not accessible during development? (I also checked partner carrier boards and found no SDIO)
I assume that I am just missing something or misunderstanding the general availability of the SDIO interface.
Thanks for your help!
After Reviewing the Schematics I was able to find these pins (why are they not in other guides???)
They are at the M2 Key E slot of the WIFI card. But require some soldering to be accessible! Are we not supposed to develop something for this interface? This causes a lot of confusion.
So I would assume we have to design some kind of pinout/adapter card for our SDIO Memory to be able to use this during development. Correct?