MicroSD support

yang jun

Prodigy 20 points

Other Parts Discussed in Thread: OMAPL138

Hi,

May I have some questions about OMAP1710 and OMAPL138?

1. Can OMAP1710's MMC/SD interface support MicroSD?

2. Can OMAPL138's MMC/SD interface support MicroSD?

3. Can OMAPL138's MMC/SD interface be accessed by C674?

Appreciate your answer, thanks.

over 14 years ago

0 Mukul Bhatnagar over 14 years ago

TI__Guru* 83855 points

yang jun said:
Can OMAP1710's MMC/SD interface support MicroSD?

OMAP1710 MMC/SD controller seems to be SD v1.0 spec compliant. It would be difficult to address the query on micro SD support on OMAP1710 specifically, as that device is not supported by most of the team supporting this forum. It might be best to get in touch with your local TI field office for OMAP1710 specific queries.

yang jun said:
Can OMAPL138's MMC/SD interface support MicroSD?

OMAPL138 MMC/SD controller is SD v1.1 compliant. MicroSD cards upto 2GB are supported as per the host controller spec. Higher density SDHC cards upto 32 GB have been tested and reported to work with OMAPL138. Greater then 2GB functionality typically implies SD v 2.0 specification. However since the MMC/SD host controller IP on OMAPL138 is v1.1 compliant , from a datasheet/userguide perspective we document SD v1.1 compliance only.

yang jun said:
Can OMAPL138's MMC/SD interface be accessed by C674?

Yes, all modules/peripherals including MMC/SD are accessible by both c674x CPU as well as the ARM9 CPU on OMAPL1x processors.

Regards

Mukul

0 yang jun over 14 years ago in reply to Mukul Bhatnagar

Prodigy 20 points

Hi Mukul,

Thanks your clarification.

B.R

William

0 Jase3640 over 14 years ago in reply to yang jun

TI__Expert 5565 points

So will the C6748 support SD cards > 2GB?

Cheers

Jase

0 Gaurav Agarwal over 14 years ago in reply to Jase3640

TI__Expert 3425 points

Jase,

> 2GB cards (SDHC) are supported as mass storage device (for basic read/write operations).

Regards,
Gaurav

0 Jase3640 over 14 years ago in reply to Gaurav Agarwal

TI__Expert 5565 points

This is good news.

Can you please point me at documentation / drivers that indicates this? I can't find it documented anywhere but maybe I'm looking in the wrong places!

Cheers

Jase

0 Gaurav Agarwal over 14 years ago in reply to Jase3640

TI__Expert 3425 points

Please see some performance bechmarks (using SDHC) and other details at:

http://processors.wiki.ti.com/index.php/DaVinci_PSP_03.20.00.14_Device_Driver_Features_and_Performance_Guide#MMC.2FSD_Driver

Thanks,
Gaurav

Processors

Processors forum

MicroSD support