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DM648_EMIF问题



AWCC寄存器的WPbit置0,是不是表示ARDY处于disabled状态?

  • 不是,是用来定义信号极性的,如果不用,可以通过上拉或者下拉电阻将其置于固定ready状态。

    Asynchronous ready (AARDY) pin polarity. Defines the polarity of the AARDY pin.

    1 AARDY pin is active-high (strobe period extended when AARDY is high)

    0 AARDY pin is active-low (strobe period extended when AARDY is low)