3 Replies Latest reply on Aug 22, 2016 12:03 AM by sdhk

    Application question about flash S25FL256S

    jun_liu_1823251

      Hi:
            I connect the flash S25FL256S with TI DSP SPI,now I can read the Device ID and Common Flash Interface information accurately with the "RDID" command. But when I want to use the command "WREN" to enable the write, It's failure. After send the "WREN" command ,  I can't read the right status on the "WEL" of the Status Register1. How can I enable the write? The CS# is only 8 clocks.

         

            The other question is  that the S25FL256S can  be driven by SPI mode 0 and mode 3;  What's the exact mean of these mode. The TI's SPI mode define as follows:           

                                                                                                                                                                                            
      POLARITYPHASE Action
      00

      Data is output on the rising edge of SPICLK. Input data is latched on the falling edge

      10

      Data is output one half-cycle before the first rising edge of SPICLK and on subsequent falling

      edges. Input data is latched on the rising edge of SPICLK.

      01

      Data is output on the falling edge of SPICLK. Input data is latched on the rising edge.

      11

      Data is output one half-cycle before the first falling edge of SPICLK and on subsequent rising

      edges. Input data is latched on the falling edge of SPICLK.

         

           Now, I use the mode polarity 1 phase 0 ,  do I use the  right mode ?

         


           Thank you for your reply!