Nvidia JETSON XAVIER NX Design Guide

NVIDIA Jetson Xavier NX DG-09693-001_v1.7 | 61
Chapter 10. SD Card and SDIO
Jetson Xavier NX uses one SDMMC interface for on-module eMMC (SDMMC4 on Xavier) and
brings one to the connector pins for SD Card or SDIO use.
Table 10-1. SDIO Pin Descriptions
Pin #
Module Pin
Name
Xavier Signal Usage/Description
Recommended
Usage
Directio
n
Pin Type
229 SDMMC_CLK SDMMC3_CLK SD Card or SDIO Clock
SD Card or SDIO
Device
Output
CMOS –
1.8V/3.3V
227 SDMMC_CMD SDMMC3_CMD SD Card or SDIO Command
Bidir
219 SDMMC_DAT0 SDMMC3_DAT0 SD Card or SDIO Data 0
221 SDMMC_DAT1 SDMMC3_DAT1 SD Card or SDIO Data 1
223 SDMMC_DAT2 SDMMC3_DAT2 SD Card or SDIO Data 2
225 SDMMC_DAT3 SDMMC3_DAT3 SD Card or SDIO Data 3
Notes:
1. In the Type/Dir column, Output is from Jetson Xavier NX. Input is to Jetson Xavier NX. Bidir is for Bidirectional signals.
2. The direction shown in the table above for SDMMC_CLK is true when used for that function. If used as a GPIO, the pin supports
input or output (bidirectional).
3. If the SDMMC pins are connected to a 1.8V only device, the interface voltage should be configured for 1.8V operation in the Pinmux.

Nvidia JETSON XAVIER NX Specifications

General

Storage	16 GB eMMC 5.1
AI Performance	21 TOPS (INT8)
Operating Temperature	-25°C to 80°C
Operating System	Linux (JetPack SDK)
GPU	NVIDIA Volta architecture with 384 CUDA cores and 48 Tensor cores
CPU	6-core NVIDIA Carmel ARMv8.2 64-bit CPU 6 MB L2 + 4 MB L3
Memory	8GB 128-bit LPDDR4x
Video Decode	2x 4K60 | 4x 4K30 | 8x 1080p60 | 16x 1080p30 (H.265/H.264)
Camera	Up to 6 cameras
Connectivity	Gigabit Ethernet, M.2 Key E for Wi-Fi/Bluetooth
Power	10 W / 15 W / 20 W
Dimensions	70mm x 45mm