RIALTO SBC/Interfaces and Connectors/micro SD

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History
Issue Date Notes
2024/01/12 First documentation release



micro SD interface[edit | edit source]

Description[edit | edit source]

The SD interface is available on RIALTO SBC at the connector J43.

J43 is a Micro-SD card header. This interface is connected to the SD1 controller of the i.MX6UL CPU.

micro SD connector

Signals[edit | edit source]

The following table describes the interface signals:

Pin# Pin name Pin function Pin Notes
1 SD_DAT2 Data 2
2 SD_DAT3 Data 3
3 SD_CMD CMD
4 3V3_IO +3.3 V
5 SD_CLK Clock
6, 11 DGND Ground
7 SD_DAT0 Data 0
8 SD_DAT1 Data 1
9, 10 PCB_GND_RNG Shield
12 SD_DET Card detect

Device mapping[edit | edit source]

The microSD card is mapped to /dev/mmcblk0.

Device usage[edit | edit source]

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