OMAP-L138: SATA and MMC storage density

Hi Franz,

The OMAP-L138 device includes an two MMCSD controllers which are compliant with MMC v4.0, Secure Digital Part 1 Physical Layer Specification V1.1 and Secure Digital Input Output (SDIO) V2.0 specifications. Which means you can use SD cards with max size up to 32 GB.

The SATA Controller supports  AHCI controller spec 1.1 and 1.5 Gbps (Gen1i) and 3 Gbps (Gen2i) line speeds. The limitation comes from 32-bit addressing space but 64-bit addressing space is not supported. If the block size is 512 bytes the limitation is 2 TB (512 * 2 ^ 32 bytes). Of course the limitation can be caused by used file system. 
You can find more details about OMAP-L1x Serial ATA at:

Regards,
Tsvetolin Shulev

Hi Franz,

Regarding MMC, I think that any sd card compliant with the standards described in Section 27.1.5 Industry Standard(s) Compliance Statement of the TRM should work with OMAP-L138 devices. I have not heard of tested maximum supported storage density.

Same thing applies for SATA, the storage device should comply with Section 29.1.2 Features Supported and you should also have in mind Section 29.1.3 Features Not Supported.

Best Regards,
Yordan

One more thing to point out along with all the helpful guidance Yordan has provided, especially if this is a new design.

It would be good for you/your customer to be aware of the Silicon advisory 2.3.22 on SATA for these devices

http://www.ti.com/lit/er/sprz301m/sprz301m.pdf

This has unfortunately been a show stopper for several customers who want to use SATA on this device, given most HDDs are now GEN3 etc.

Regards

Mukul