# Simultaneous use of EMMC AND Micro SD **URL:** \ **Category:** Jetson Nano\ **Created:** [October 6, 2019, 6:09am UTC](https://forums.developer.nvidia.com/t/simultaneous-use-of-emmc-and-micro-sd/82814 "2019-10-06T06:09:09Z")\ **Posts on this page:** 11\ **Page:** 1
**Author:** ![hhami.2040](https://developer.download.nvidia.com/images/forums/profile-default-devtalk-84.png) [@hhami.2040](https://forums.developer.nvidia.com/u/hhami.2040)\ **Post date:** [October 6, 2019, 6:09am UTC](https://forums.developer.nvidia.com/t/simultaneous-use-of-emmc-and-micro-sd/82814/1 "2019-10-06T06:09:09Z")
Hello, We want Design a Develope Board for Jetson Nano Modoule, I want to Flash OS and Kernel on EMMC and Record, Camera video File on micro-SD!! Ques1: Can micro SD and emmc be used simultaneously? In Jetson Modoule,Aren’t the two in common? Ques2: No PCB File for Jetson Nano Development Board ?? Thank you for your guidance, ---
**Author:** ![kayccc](https://sea2.discourse-cdn.com/nvidia/user_avatar/forums.developer.nvidia.com/kayccc/32/14043_2.png) [@kayccc](https://forums.developer.nvidia.com/u/kayccc)\ **Post date:** [October 6, 2019, 11:17pm UTC](https://forums.developer.nvidia.com/t/simultaneous-use-of-emmc-and-micro-sd/82814/2 "2019-10-06T23:17:20Z")
Hi hhami.2040, The micro SD and emmc images are different, they can’t be used simultaneously. Regarding the PCB filed, it will be published soon, please stay tuned. Thanks ---
**Author:** ![hhami.2040](https://developer.download.nvidia.com/images/forums/profile-default-devtalk-84.png) [@hhami.2040](https://forums.developer.nvidia.com/u/hhami.2040)\ **Post date:** [October 7, 2019, 6:12am UTC](https://forums.developer.nvidia.com/t/simultaneous-use-of-emmc-and-micro-sd/82814/3 "2019-10-07T06:12:51Z")
Hi kayccc, I mean, electrically, Is it possible to have both Micro and EMMC in the Jetson Nano Modoule? Are there two MMC Electrically ports on the Core board? One for MMC and one for MicroSD!! ---
**Author:** ![hhami.2040](https://developer.download.nvidia.com/images/forums/profile-default-devtalk-84.png) [@hhami.2040](https://forums.developer.nvidia.com/u/hhami.2040)\ **Post date:** [October 7, 2019, 8:07am UTC](https://forums.developer.nvidia.com/t/simultaneous-use-of-emmc-and-micro-sd/82814/4 "2019-10-07T08:07:46Z")
If dont exisit two MMC Electrically port, Is it possible to somehow add SATA to the Jetson Nano? Are there M.2 Key E adapters or is it possible to use the PCI Express lanes? Thank you for your guidance, ---
**Author:** ![Trumany](https://sea2.discourse-cdn.com/nvidia/user_avatar/forums.developer.nvidia.com/trumany/32/14043_2.png) [@Trumany](https://forums.developer.nvidia.com/u/Trumany)\ **Post date:** [October 16, 2019, 9:33am UTC](https://forums.developer.nvidia.com/t/simultaneous-use-of-emmc-and-micro-sd/82814/5 "2019-10-16T09:33:50Z")
Jetson Nano uses one SDMMC interface for on-module eMMC (SDMMC4 on Tegra) and brings one to the connector pins for SD Card or SDIO use, please check [Design Guide](https://developer.nvidia.com/embedded/dlc/jetson-nano-product-design-guide) for detail info. ---
**Author:** ![ChiaoWang](https://developer.download.nvidia.com/images/forums/profile-default-devtalk-84.png) [@ChiaoWang](https://forums.developer.nvidia.com/u/ChiaoWang)\ **Post date:** [October 25, 2019, 7:38am UTC](https://forums.developer.nvidia.com/t/simultaneous-use-of-emmc-and-micro-sd/82814/6 "2019-10-25T07:38:24Z")
Dear Sir, We have the similar question for SDcard application. 1. Has possible release nano module that both exist SD card connector and eMMC? Because SD/SDIO support 1.8/3.3V on the Nano datasheet.And Product Design Guide only support 1.8V. On the Jetson Nano Block Diagram (Fig1.,Nano Product Design Guide),the eMMC and SD Card/SDIO is exist, separately. 2. Refer the Product Design Guide, SD Card functionality is not supported on this interface as it has a fixed 1.8V supply. if we have the voltage-translation IC (3.3V to 1.8V) on carrier board, SD Card functionality will be supported with Nano? We are looking forward to your reply. Thanks! ---
**Author:** ![Trumany](https://sea2.discourse-cdn.com/nvidia/user_avatar/forums.developer.nvidia.com/trumany/32/14043_2.png) [@Trumany](https://forums.developer.nvidia.com/u/Trumany)\ **Post date:** [October 28, 2019, 2:01am UTC](https://forums.developer.nvidia.com/t/simultaneous-use-of-emmc-and-micro-sd/82814/7 "2019-10-28T02:01:01Z")
SDCARD is supported, 3.3V/1.8V is supported, that’s a doc issue to fix to 1.8V in DG, it will be corrected in the future. ---
**Author:** ![ChiaoWang](https://developer.download.nvidia.com/images/forums/profile-default-devtalk-84.png) [@ChiaoWang](https://forums.developer.nvidia.com/u/ChiaoWang)\ **Post date:** [October 28, 2019, 2:24am UTC](https://forums.developer.nvidia.com/t/simultaneous-use-of-emmc-and-micro-sd/82814/8 "2019-10-28T02:24:42Z")
Dear Trumany, That’s good news. Thanks for your response. ---
**Author:** ![viviehon](https://developer.download.nvidia.com/images/forums/profile-default-devtalk-84.png) [@viviehon](https://forums.developer.nvidia.com/u/viviehon)\ **Post date:** [October 31, 2019, 11:00am UTC](https://forums.developer.nvidia.com/t/simultaneous-use-of-emmc-and-micro-sd/82814/9 "2019-10-31T11:00:09Z")
Dear Trumany, I design the carrier board with SDMMC,refer to Jetson Nano Product Design Guide,but it doesn’t be Identified,how to used it? Thank you for your guidance ---
**Author:** ![Trumany](https://sea2.discourse-cdn.com/nvidia/user_avatar/forums.developer.nvidia.com/trumany/32/14043_2.png) [@Trumany](https://forums.developer.nvidia.com/u/Trumany)\ **Post date:** [November 1, 2019, 4:02am UTC](https://forums.developer.nvidia.com/t/simultaneous-use-of-emmc-and-micro-sd/82814/10 "2019-11-01T04:02:05Z")
> [@](#): > > Dear Trumany, > > I design the carrier board with SDMMC,refer to Jetson Nano Product Design Guide,but it doesn’t be Identified,how to used it? > > Thank you for your guidance I am not so clear about your question. Do you mean the board is ready and SD card can’t be detected? Or you just concern your design is not OK even follow Design Guide? ---
**Author:** ![nadeemm](https://sea2.discourse-cdn.com/nvidia/user_avatar/forums.developer.nvidia.com/nadeemm/32/367020_2.png) [@nadeemm](https://forums.developer.nvidia.com/u/nadeemm)\ **Post date:** [October 15, 2021, 2:50am UTC](https://forums.developer.nvidia.com/t/simultaneous-use-of-emmc-and-micro-sd/82814/11 "2021-10-15T02:50:45Z")
Closed on October 15, 2021, 2:50am UTC