3 Replies Latest reply on Mar 16, 2018 11:39 AM by buha

    S25FL116_WRDI_0x04

    Baskar.Rajan_3231011

      What is the use of Write Disable (WRDI 0x04) command in S25FL116K flash  function.

        • 1. Re: S25FL116_WRDI_0x04
          buha

          Hello Baskar,

          Thank you for contacting Cypress Community Forum. The Write Disable command resets the Write Enable Latch (WEL) bit in the Status Register to a 0. The Write Disable command is entered by driving CS# low, shifting the instruction code “04h” into the SI pin and then driving CS# high. Note that the WEL bit is automatically reset after Power-up and upon completion of the Write Status Registers, Erase / Program Security Registers, Page Program, Sector Erase, Block Erase and Chip Erase commands. A write disable state occurs upon power-up or after any of the following commands: Write Disable, Page Program, Sector Erase, Block Erase, Chip Erase, Write Status Registers, Erase Security Register and Program Security Register.

           

          Thank you

          Regards,

          Bushra

          • 2. Re: S25FL116_WRDI_0x04
            Baskar.Rajan_3231011

            Is it necessary to use Write Disable (WRDI 0x04) command in S25FL116K flash  function "Explicitly" after every write operation.

            • 3. Re: S25FL116_WRDI_0x04
              buha

              Hello Basker,

              No. WEL latch is disabled every write/program. Please refer to section 9.1.4 on the datasheet.

               

              Thank you and have a wonderful weekend

              Regards,

              Bushra