Jetson AGX Xavier Series Product
DG-09840-001_v2.5 | 94
Chapter 11.
SDIO and SD Card
Jetson AGX Xavier has two SD/MMC interfaces. One is used on Jetson AGX Xavier for eMMC for
boot and storage and one is brought to the connector pins for SD Card or SDIO use.
Table 11-1.
SDIO, SD Card, and eMMC Interface Mapping
Module Pins
SoC Interface
Width
Usage
SDCARD_CLK
SDMMC1
4-bit
Micro SD / UFS Card socket
na
SDMMC4
8-bit
eMMC device on Module
Table 11-2.
Jetson AGX Xavier SDMMC Pin Descriptions
Pin #
Module Pin
Name
SoC Signal
Usage/Description
Usage on NVIDIA Carrier
Board
Direction
Pin Type
B6
SDCARD_CLK
SDMMC1_CLK
SD Card (or SDIO) Clock
Micro SD / UFS Card Socket
Output
CMOS – 3.3V/1.8V
A5
SDCARD_CMD
SDMMC1_CMD
SD Card (or SDIO) Command
Bidir
E8
SDCARD_D0
SDMMC1_DAT0
SD Card (or SDIO) Data 0
F8
SDCARD_D1
SDMMC1_DAT1
SD Card (or SDIO) Data 1
A4
SDCARD_D2
SDMMC1_DAT2
SD Card (or SDIO) Data 2
D6
SDCARD_D3
SDMMC1_DAT3
SD Card (or SDIO) Data 3
B58
GPIO21
DAP6_SCLK
GPIO
SD Power Switch On
Output
CMOS – 3.3V
L6
GPIO02
SOC_GPIO11
GPIO
SD Card socket (SD Detect)
Bidir
CMOS – 1.8V
Notes:
1.
In the Type/Dir column, Output is from Jetson AGX Xavier. Input is to Jetson AGX Xavier. Bidir is for Bidirectional signals.
2.
The direction shown in the table above for SDCard_CLK and GPIO21 is true when used for those functions. If used as a GPIO, the pin supports
input or output (bidirectional).
11.1
SD Card
Figure 11-1 shows a Micro SD card socket connection example. Internal pull-up resistors are
used for SDCARD Data/CMD lines. External pull-ups are not required and cannot be used due
to the internal pad voltage selection.