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Can MMC3 interface work as SPI mode?

Our processor is DRA71X and DRA74X, with 3.02.00.03 SDK version

We want to test MMC3 interface(only connect cmd, clk, 4 data pins) through connect with SPI flash(has CS#, SCLK, SIO0~3, GND, VCC), and test it by read/write flash.

Is this test scenario ok?

Can MMC3 interface work as SPI mode?

Regards,

Shawn