Boot from MMC1 on AM3352

Nomo

Other Parts Discussed in Thread: AM3352, TMDXEVM3358

Hello,

I have a trouble to boot from MMC1 (eMMC) on AM3352.
The eMMC is connected as defined in the TRM "Pins Used for MMC1 Boot" table, however the system can't be booted.
What case do you consider for this trouble?
(Already I checked "http://e2e.ti.com/support/arm/sitara_arm/f/791/p/196388/700616.aspx#700616")

Also, I tried to boot from MMC1 (eMMC) by using TMDXEVM3358.
The first trying conditions are following:
- using TMDXEVM3358 (REV 1.4A)
- using MMC1 port
- using included Linux SDK SD card (v5.04.01)
- PROFILE SELECTION (SW6) is all off (0000)

In above conditions, Linux is not booted.

Instead of setting SW6 to 0000, I only set switch=2 to 1 (switch-1234 = 0100).
Then, the boot is succeeded.
Why should I change the SW6 setting for booting?
If this change concerns to the MMC1 booting, should the eMMC connection be changed?

Best Regards

Nomoto

over 13 years ago

0 Biser Gatchev-XID over 13 years ago

TI__Guru**** 393215 points

Hi Nomoto,

MMC1 is interfaced through the CPLD on the AM335X EVM. It's available in profile #2 (switch-1234 = 0100). In all other profiles these pins are not connected to the MMC1 card cage.

0 Nomo over 13 years ago in reply to Biser Gatchev-XID

Guru 16800 points

Biser-san,

Thanks for your reply.

However, what is a profile?
Should I change the software or hardware to boot from MMC1 for our EVM?
I think the MMC1 connection is correct on our EVM.

Best Regards

Nomoto

0 Biser Gatchev-XID over 13 years ago in reply to Nomo

TI__Guru**** 393215 points

Hi Nomoto-san,

Check this link: http://processors.wiki.ti.com/index.php/AM335x_General_Purpose_EVM_HW_User_Guide. It gives a detailed description of the EVM hardware.

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Boot from MMC1 on AM3352