3 Replies Latest reply on Jan 7, 2019 5:48 PM by AlbertB_56

    1Gb NOR flash commendation

    MiRo_263836

      1Gb NOR Flash using S29GL S series (65nm).  However, Cypress also have a S29GL T series (45nm).  In checking Cypress Roadmap slides, it seems both series are supported in the future.   Wouldn’t the 45nm series be cheaper?  How does Cypress position these two series for !Gb applications? Which is the preferred choice for new designs?  Using the 64 BGA pkg.

        • 1. Re: 1Gb NOR flash commendation
          AlbertB_56

          Hello,

           

          Thank you for contacting Cypress Semiconductor.

           

          The main difference between the S29GL01GS and the S29GL01GT are as follows :

           

          - S29GL01GS family series is a dedicated x16 (WORD) mode FLASH memory device, as there are sixteen active I/O's

          (DQ15 - DQ0).  Therefore, the BYTE# mode input signal pin does not exist on the S29GL01GS.

           

          - S29GL01GT family series can be configured in either x16 (WORD) mode, or x8 (BYTE) mode, as the S29GL01GT does have

          the BYTE# input signal pin that exists.  In x8 (BYTE) mode, the BYTE# pin must be pulled to Logic LOW, as DQ7 - DQ0 are active

          I/O's, and DQ15 - DQ8 are tri-stated.  In x16 (WORD) mode, the BYTE# pin must be pulled to Logic HIGH, as DQ15 - DQ0 are all

          active I/O's.  The default configuration at power-up is x16 (WORD) mode (DQ15 - DQ0 are active I/O's), for a seamless migration

          path from the S29GL01GS.

           

          The S29GL-T family series is the newest Parallel NOR FLASH memory product.  Please consult your Cypress Sales Representative

          or authorized distributor in regards to pricing, availability, lead-times, and delivery of the S29GL-T.

           

          Hope this helps...

           

           

          Thank you and regards,

           

          Albert

          Cypress Semiconductor

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          • 2. Re: 1Gb NOR flash commendation
            MiRo_263836

            It is helpful but didn't really answer the question.  Which is preferred for new designs? 

            • 3. Re: 1Gb NOR flash commendation
              AlbertB_56

              Hello,

               

              As you had already pointed out, both the S29GL-S and S29GL-T are supported in the future.

               

              The question whether you wish to design in the x16 (WORD) mode only (S29GL-S);

              Or does your system requirements need the flexibility of a configurable x8 (BYTE) mode

              or x16 (WORD) mode FLASH memory device, as both the S29GL-S and S29GL-T are

              supported in the future.  Both FLASH memory devices would be preferred for new designs.

               

              Please consult your Cypress Sales Representative or authorized distributor in regards

              to pricing, availability, lead-times, and delivery of the S29GL-S, or the S29GL-T.

               

               

              Best regards,

              Albert

              Cypress Semiconductor

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