Max SD card size limit on Apalis IMX8

Hello All,

We are using Apalis IMX8 SOM on our board. We have connected SD card slot to SDHC2. Below is the image for reference.

What is the maximum SD card size that is supported by SDHC2?
I did not find any reference to SDXC in this Apalis IMX8 datasheet
apalis_imx8_datasheet.pdf (2.4 MB)
Is SDXC bus available on Apalis IMX8 SOM?

Prathamesh Kulkarni

Hi All,
Could you please share your thoughts on this?

Prathamesh Kulkarni

Hi @prathamesh.kulkarni

As Per the imx8QM reference manual chapter 14 section,It supports the SD Memory Card Specification version 3.0 and the Extended Capacity SD Memory Card.To be honest we yet to test with higher capacity card but ideally it should be able to handle.

On a HW level maximum SD card size is defined by SOC (iMX8 in your case) and according to iMX8 datasheet It supports SDHX mode . With a maximum size up to 2TB

Thanks @ashok.tx and @alex.tx for your inputs,
I have downloaded i.MX8QP datasheet from above mentioned location. In the datasheet, I found the description of uSDHC.

In this description the Block Mnemonic is uSDHC and int block name SDXC is mentioned.
It looks little confusing. Could you please help me understand whether i.MX8 supports SDHC or SDXC?

Prathamesh Kulkarni

The uSDHC is stands for Ultra Secured Digital Host Controller