# Jetson xavier nx not detecting the SD card slot

**URL:** <https://forums.developer.nvidia.com/t/jetson-xavier-nx-not-detecting-the-sd-card-slot/233555>\
**Category:** Jetson Xavier NX\
**Tags:** boot, jetson\
**Created:** [November 11, 2022, 12:22pm UTC](https://forums.developer.nvidia.com/t/jetson-xavier-nx-not-detecting-the-sd-card-slot/233555 "2022-11-11T12:22:41Z")\
**Posts on this page:** 1\
**Showing post:** 11

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**Author:** ![WayneWWW](https://sea2.discourse-cdn.com/nvidia/user_avatar/forums.developer.nvidia.com/waynewww/32/14043_2.png) [@WayneWWW](https://forums.developer.nvidia.com/u/WayneWWW)\
**Post date:** [November 12, 2022, 8:59am UTC](https://forums.developer.nvidia.com/t/jetson-xavier-nx-not-detecting-the-sd-card-slot/233555/11 "2022-11-12T08:59:16Z")

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> [@Jetson\_Xavier\_NX SDMMC3(SD card) not found](https://forums.developer.nvidia.com/t/jetson-xavier-nx-sdmmc3-sd-card-not-found/143881):
>
> hi We use sdmmc3 on the carrier board, but we cannot see this device, Some similar problems were found from forums, but none of them can solve the problem of not being able to catch SDCard. How can we use the sdcard on sdmmc3? Best Regards

> [@Jetson Xavier NX Production module, SDMMC3, boot looping when insert SD Card](https://forums.developer.nvidia.com/t/jetson-xavier-nx-production-module-sdmmc3-boot-looping-when-insert-sd-card/178138):
>
> Hi all, I have designed a custom carrier board for Jetson Xavier NX (production version) with external SD card supported. I modify dtbs file to enable smmc3: sdmmc3: sdhci@3440000 { mmc-ocr-mask = \<0x0\>; // cd-inverted; // our cd-pin not inverted cd-gpios = \<&tegra\_main\_gpio TEGRA194\_MAIN\_GPIO(Q, 1) 1\>; nvidia,cd-wakeup-capable; nvidia,vmmc-always-on; mmc-ocr-mask = \<0\>; // cd-inverted; vmmc-supply = \<&p3668\_vdd\_sdmmc1\_sw\>; status = “okay”; }; When i insert the SD card, my Jetson f…

> [@Add SDMM3 support in the device tree for NX module](https://forums.developer.nvidia.com/t/add-sdmm3-support-in-the-device-tree-for-nx-module/197193):
>
> Hi, I take the [link](https://forums.developer.nvidia.com/t/jetson-xavier-nx-gpio08-is-fan-tach-and-sd-card-detect-i-need-the-two-function/-all-p113210/3) as reference to add SD support on our carrier board. And add the node as below into the dts file: sdmmc3: sdmmc3@3440000 { mmc-ocr-mask = \<0x0\>; cd-inverted; cd-gpios = \<&tegra\_aon\_gpio TEGRA194\_AON\_GPIO(CC, 4) 0\>; nvidia,cd-wakeup-capable; mmc-ocr-mask = \<0\>; cd-inverted; vmmc-supply = \<&p3668\_vdd\_sdmmc3\_sw\>; status = "okay"; }; But when comple the device tree, it says: ERROR (duplicate\_property\_names): Duplicate property name mmc-ocr-mask in /sdmmc3@3400000 ERR…

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