About the SDMMC interface & PCIe

Robotics & Edge Computing Jetson & Embedded Systems Jetson Nano
1

Hi,

I noticed that in the pin list of Jetson nano there is a SDMMC, I want to konw:

  1. does this interface share the same physical interface with SD card on nano board?

  2. If the answer of 1) is yes, When I use the production nano board(with eMMC), can I use SDMMC interface for other purpuse? such as connect to WIFI module.

Also a question about PCIE:

can the PCIe interface support 4x1 lane or 2x2lane? or only support 1 device? except use PCIe switch.

2

Hi, please refer to OEM DG. SDMMC3 is for external SDCARD/SDIO design, internal eMMC is on SDMMC4 port.

Tegra contains a PCIe controller that brings one interface up to four lanes to the module pins for use on the carrier board, it can be x1, x2 or x4.

3

Hi， Trumany

If I use the nano board in develop kit (with SD card), does the SDMMC3 in gold figer can be used in My coustom carrier board?

4

Your custom board should follow current docs in DLC (with eMMC version), it is not compatible to module with SD CARD.