AXEL ULite SOM/AXEL ULite Evaluation Kit/Interfaces and Connectors/micro SD

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Issue Date Notes
2021/07/19 First EVK release

micro SD interface[edit | edit source]

Description[edit | edit source]

The micro SD interface available on the Evaluation Kit at the connector J13.

J13 is a Micro-SD card header. This interface is connected to the USDHC1 controller of the i.MX6UL CPU.

micro SD connector

Signals[edit | edit source]

The following table describes the interface signals:

Pin# SOM Pin# Pin name Pin function Pin Notes
J13.1 J1.79 SD_DATA2 Data 2
J13.2 J1.81 SD_DATA3 Data 3
J13.3 J1.83 SD_CMD CMD
J13.4 - 3V3 +3.3 V
J13.5 J1.85 SD_CLK Clock
J13.6, J13.12 - DGND Ground
J13.7 J1.75 SD_DATA0 Data 0
J13.8 J1.77 SD_DATA1 Data 1
J13.9, J13.10, J13.11 - SD_SHIELD Shield
J13.13 J1.177 UART1_nRTS Card detect

Device mapping[edit | edit source]

The microSD card is mapped to /dev/mmcblk0. The available partitions are available as /dev/mmcblk0p1, /dev/mmcblk0p2, etc.

Device usage[edit | edit source]

The device can be mounted/accessed as a standard block device in Linux.