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AM3517 MMC1 / MMC2

Inderjit Bains

Expert 2745 points

Table 2-1 in the datasheet (SPRS550C) indicates that MMC1 and MMC2 have the same power supply, VDDSHV, which can be 1.8V or 3.3V. Section 19.2 (MMC/SD/SDIO Environment) of the TRM says that only MMC1 is 1.8/3.3V and MMC2/MMC3 is for 1.8V only. If VDDSHV is 3.3V, how can MMC2 be 1.8V?

over 14 years ago

0 Michael Risley over 14 years ago

TI__Expert 5215 points

I suspect the information in this TRM is not up-to-date, and that MMC2/MMC3 are both 1.8/3.3V as well.

As I am not entirely sure on this, I will get back to you when I find confirmation.

0 Michael Risley over 14 years ago in reply to Michael Risley

TI__Expert 5215 points

Inderjit,

Yes, the information within this TRM seems to be misleading. I'm sorry for the confusion.

Please refer to this wiki for details on the MMC interface on AM35x:

http://processors.wiki.ti.com/index.php/SD-MMC_Usage_Notes_on_AM35x