Sdio/Sdcard/Emmc; Sd Card - Nvidia Jetson TX2 Manual

9.0 SDIO/SDCARD/EMMC

Jetson TX2/TX2i has four SD/MMC interfaces. The mapping of these interfaces for each module is show n in the SDIO / SD
Card / eMMC Interface Mapping table.
Table 52. SDMMC Pin Descriptions
Pin # Module Pin Name
G18 SDCARD_CLK
G19 SDCARD_CMD
H18 SDCARD_D0
H17 SDCARD_D1
F19 SDCARD_D2
F18 SDCARD_D3
F17 SDCARD_CD#
H16 SDCARD_PWR_EN
F20 SDCARD_WP
B30 SDIO_CLK
B29 SDIO_CMD
B32 SDIO_D0
A32 SDIO_D1
A31 SDIO_D2
A30 SDIO_D3
A29 SDIO_RST#
Note: The SDIO Signals highlighted in Cyan are available only on the Jetson TX2i module pins (not on Jetson TX2).
Table 53. SDIO / SD Card / eMMC Interface Mapping
Module Pins Tegra Interface
SDCARD SDMMC1
N/A SDMMC2
SDIO (TX2i only) SDMMC3
N/A SDMMC4

9.1 SD Card

The Figure show s a standard SD socket. Internal pull-up resistors are used for SDCARD Data/CMD lines, so external pull-ups
are not required.
JETSON TX2/TX2i OEM PRODUCT | DESIGN GUIDE | 20180618
Tegra Signal Usage/Description
SDMMC1_CLK SD Card (or SDIO) Clock
SDMMC1_CMD SD Card (or SDIO) Command
SDMMC1_DAT0 SD Card (or SDIO) Data 0
SDMMC1_DAT1 SD Card (or SDIO) Data 1
SDMMC1_DAT2 SD Card (or SDIO) Data 2
SDMMC1_DAT3 SD Card (or SDIO) Data 3
GPIO_EDP2 SD Card Card Detect
GPIO_EDP3 SD Card power switch Enable
GPIO_EDP1 SD Card Write Protect
SDMMC3_CLK SDIO Clock
SDMMC3_CMD SDIO Command
SDMMC3_DAT0 SDIO Data 0
SDMMC3_DAT1 SDIO Data 1
SDMMC3_DAT2 SDIO Data 2
SDMMC3_DAT3 SDIO Data 3
NFC_EN SDIO Reset
Width
4-bit
4-bit
4-bit
8-bit
NVIDIA Jetson TX2/TX2i OEM Product Design Guide
Usage on the Carrier
Board
SD Card
SDIO
Usage
SD (Primary SD Card). Can be used instead for SDIO
interface.
Pins used for EQOS for Ethernet on the module
Jetson TX2: Used for WLAN/BT
Jetson TX2i: Available for SDIO at module pins
Used on the module - eMMC
Direction Pin Type
Output CMOS – 3.3/1.8V
Bidir CMOS – 3.3/1.8V
Bidir CMOS – 3.3V/1.8V
Bidir CMOS – 3.3V/1.8V
Bidir CMOS – 3.3/1.8V
Bidir CMOS – 3.3/1.8V
Input CMOS – 1.8V
Output CMOS – 1.8V
Input CMOS – 1.8V
Output CMOS – 1.8V
Bidir CMOS – 1.8V
Bidir CMOS – 1.8V
Bidir CMOS – 1.8V
Bidir CMOS – 1.8V
Bidir CMOS – 1.8V
Output CMOS – 1.8V
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