Nvidia JETSON XAVIER NX

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.