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The Changing Serial Flash Memory Landscape


SPI [pronounced "S.P.I" or "spy]
The serial peripheral interface (SPI) is an interface that enables the
serial (one bit at a time) exchange of data between two devices.
It has been employed in systems for communication between
processors and Flash memory. The simple serial interface
requires fewer connections and thus fewer pins. This lowers cost,
simplifies board layout and reduces the form factor of many
embedded designs.                                                        SPANSION® FL-S SPI FLASH MEMORY ADVANCEMENTS


                                                                           5X FASTER ERASE

 1979                                                                                                               >   Enables faster code
                                                                                                 0.7                    update
  1979               The year the serial peripheral interface




                                                                              Seconds
                     was first used.
                                                                                                                    >   Reduces chip
                                                                                                                        re-programming time
>   Introduction of the board game Trivial Pursuit                                                                      during manufacturing
>   Margaret Thatcher was Prime Minister of the United Kingdom                                             0.13
>   Superman The Movie was a big hit                                                            Micron   Spansion
                                                                                                N25Q       FL-S         Time to program 256 Mb
                                                                                                                        Time to program 256 Mb
>   M*A*S*H, The Love Boat, Taxi and Charlie’s Angels were on TV
>   “My Sharona” by The Knack was #1 for 6 weeks on Billboard Charts
                                                                           3X FASTER PROGRAM


                                                                                                 66
                                                                                                                    >   Reduces programming
                SERIAL VS. PARALLEL INTERFACE:                                                                          costs
                                                                              Seconds



                                                                                                                    >   Increases manufacturing
                                                                                                                        throughput
                80% less board space                                                                       23
                75% fewer pin connections

                Lower System Cost with Less Performance                                         Micron   Spansion
                                                                                                N25Q       FL-S         Time to program 256 Mb


                                                                           20% FASTER READ

SPI EVOLUTION                                                                                                       >   Faster system boot times
                                                                                                           66
                                                                              DDR Read – MB/s




                                    1            1                                               54
                                                                                                                    >   Improved user experience
                    Double
                                    0            0
                   Data Rate                                66MB/s
                                    1            1
                    (DDR)
                                    0            0

                                            1
                                                                                                Micron   Spansion
                                            0
        SPEED




                      x4                                    52MB/s                              N25Q       FL-S
                                            1
                                            0

                                            1
                      x2                                    26MB/s
                                            0                            INDUSTRY-LEADING PERFORMANCE
                                                                         ENABLES INNOVATION
                      x1                    1               17MB/s
                                                                          >        High density and high performance drives new applications like
                                                                                   automotive instrument clusters with real-time graphics
                                DENSITY                                   >        Small form factor for stylish design in next generation electronics
                   512 Kb > 8 Mb > 128Mb > 1Gb                            >        Improved user experience and lower system cost

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Serial flash memory evolution infographic

  • 1. The Changing Serial Flash Memory Landscape SPI [pronounced "S.P.I" or "spy] The serial peripheral interface (SPI) is an interface that enables the serial (one bit at a time) exchange of data between two devices. It has been employed in systems for communication between processors and Flash memory. The simple serial interface requires fewer connections and thus fewer pins. This lowers cost, simplifies board layout and reduces the form factor of many embedded designs. SPANSION® FL-S SPI FLASH MEMORY ADVANCEMENTS 5X FASTER ERASE 1979 > Enables faster code 0.7 update 1979 The year the serial peripheral interface Seconds was first used. > Reduces chip re-programming time > Introduction of the board game Trivial Pursuit during manufacturing > Margaret Thatcher was Prime Minister of the United Kingdom 0.13 > Superman The Movie was a big hit Micron Spansion N25Q FL-S Time to program 256 Mb Time to program 256 Mb > M*A*S*H, The Love Boat, Taxi and Charlie’s Angels were on TV > “My Sharona” by The Knack was #1 for 6 weeks on Billboard Charts 3X FASTER PROGRAM 66 > Reduces programming SERIAL VS. PARALLEL INTERFACE: costs Seconds > Increases manufacturing throughput 80% less board space 23 75% fewer pin connections Lower System Cost with Less Performance Micron Spansion N25Q FL-S Time to program 256 Mb 20% FASTER READ SPI EVOLUTION > Faster system boot times 66 DDR Read – MB/s 1 1 54 > Improved user experience Double 0 0 Data Rate 66MB/s 1 1 (DDR) 0 0 1 Micron Spansion 0 SPEED x4 52MB/s N25Q FL-S 1 0 1 x2 26MB/s 0 INDUSTRY-LEADING PERFORMANCE ENABLES INNOVATION x1 1 17MB/s > High density and high performance drives new applications like automotive instrument clusters with real-time graphics DENSITY > Small form factor for stylish design in next generation electronics 512 Kb > 8 Mb > 128Mb > 1Gb > Improved user experience and lower system cost