For a read cycle, \WE must be inactive before the \CAS pulse is applied and remain inactive until the \CAS pulse is over.After the column address is strobed, \RAS is raised and with \RAS high and \CAS low the data bit is made available on DOUT.

For a write cycle the DIN signal should be applied by the time \CAS goes low, but after the \WE pin goes low.The write is performed through the DIN pin while \RAS,\CAS and \WE are all low.The DOUT pin is held at its high-impedance state throughout the write cycle.

For the refresh-only cycle only the row address is strobed and the \CAS pin is held inactive.The DOUT pin is kept in its high-impedance state.