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Difference between DTR mode and DTR protocol mode in OSPI controller

I see in OSPI controller registers, there two bits related to DDR modes. One is DDREN bit in OSPI_DRICTL register and other is DTREN in OSPI_CTL register. Which one should I be using to configure OSPI controller to work in DDR mode ?

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[edited by: JValeriani at 7:25 PM (GMT 0) on 3 Sep 2019]