3 Replies Latest reply on Oct 24, 2013 11:03 AM by nile

    CY62148EV30 schematic check

    syed.jawad

       hi i want to put CY62148EV30 in power down when i am on battery i have drawn schematic please check this and let me know where i am wrong .

         

      thanks for your help

         

      Regards,

        • 1. Re: CY62148EV30 schematic check
          nile

          Hi!

             

          CY62148EV30 is a Single Chip Enable device.

             

          Ball A3 ( connected to Battery Backup ) is an NC for CY62148EV30 part.

             

          To Put the device in Stand by mode (Power down mode), the CE# pin has to be de-asserted.

             

          Once CE# pin is High, Vcc (Battery voltage which will eventually power V_Backup) for SRAM can go down as low as VCCDR ( 1.5V) and SRAM will be in Power down mode.

             

          To bring back SRAM in Active mode, Vcc has to come back to Operating Voltage and then CE# can be asserted.

             

          To maintaining Pin Compatibility, you can connect Ball A3 ( NC internally) To V_Backup

             

           

             

          Regards,

             

          Nilesh

             

          Applications Engineer Staff,

             

          Async SRAM, Memory Products Division

          • 2. Re: CY62148EV30 schematic check
            syed.jawad

             thanks for your reply i am using CY62148EV30LL part.

               

            while putting in Power down mode i put CE1 (PIN G3) High and CE2 (PIN A3) to v_backup .

               

            I hope in this i will put SRAM in power down mode .

            • 3. Re: CY62148EV30 schematic check
              nile

              Hi,

                 

              Just to restate, CY62148EV30LL is a single Chip enable part..so A3 ball is not connected to chip.

                 

              G3 ball ( CE#) has to be pulled high as you rightly said to put chip in power down mode

                 

               

                 

              Regards,

                 

              NILE