1 Reply Latest reply on Nov 17, 2019 10:22 PM by SudheeshK_26

    S25FL125 power up if CS# not high

    cady_4580796

      Question regarding S25FL128S/S25FL256S flash devices with both VIO and VCC, and the treatment of CS#. The datasheet says that CS# must be pulled high during power up, ideally tracking VCC. But if VIO is at a lower voltage than VCC, (say VIO = 1V8) then wouldn’t pulling CS up to VCC violate the allowable VINH?

       

      Suppose CS is pulled up to VIO, but VIO is powered up at a later time than VCC (say at some time after tpu) :. CS# does not follow VCC; will asserting RESET# after VIO comes up ensure that the device is properly initialized?