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      參數(shù)資料
      型號(hào): M58LW032C90ZA6E
      廠商: 意法半導(dǎo)體
      英文描述: 32 Mbit 2Mb x16, Uniform Block, Burst 3V Supply Flash Memory
      中文描述: 32兆位的2Mb x16插槽,統(tǒng)一座,突發(fā)3V電源快閃記憶體
      文件頁(yè)數(shù): 12/61頁(yè)
      文件大小: 845K
      代理商: M58LW032C90ZA6E
      M58LW032C
      12/61
      dicates that the data is not, or will not be valid. Val-
      id Data Ready in a high-impedance state indicates
      that valid data is or will be available.
      Unless Synchronous Burst Read has been select-
      ed, Valid Data Ready is high-impedance. It may be
      tied to other components with the same Valid Data
      Ready signal to create a unique System Ready
      signal.
      The Valid Data Ready, R, output has an internal
      pull-up resistor of approximately 1 M
      powered
      from V
      DDQ
      , designers should use an external pull-
      up resistor of the correct value to meet the external
      timing requirements for Valid Data Ready rising.
      Refer to Figure 19.
      Status/(Ready/Busy) (STS).
      The STS signal is
      an open drain output that can be used to identify
      the Program/Erase Controller status. It can be
      configured in two modes:
      I
      Ready/Busy - the pin is Low, V
      OL
      , during
      Program and Erase operations and high
      impedance when the memory is ready for any
      Read, Program or Erase operation.
      I
      Status - the pin gives a pulsing signal to indicate
      the end of a Program or Block Erase operation.
      After power-up or reset the STS pin is configured
      in Ready/Busy mode. The pin can be configured
      for Status mode using the Configure STS com-
      mand.
      When the Program/Erase Controller is idle, or sus-
      pended, STS can float High through a pull-up re-
      sistor. The use of an open-drain output allows the
      STS pins from several memories to be connected
      to a single pull-up resistor (a Low will indicate that
      one, or more, of the memories is busy).
      STS is not Low during a reset unless the reset was
      applied when the Program/Erase controller was
      active. Ready/Busy can rise before Reset/Power-
      Down rises.
      Program/Erase Enable (V
      PEN
      ).
      The
      Erase Enable input, V
      PEN,
      is used to protect all
      blocks, preventing Program and Erase operations
      from affecting their data.
      Program/Erase Enable must be kept High during
      all Program/Erase Controller operations, other-
      wise the operations is not guaranteed to succeed
      and data may become corrupt.
      V
      DD
      Supply Voltage.
      V
      DD
      provides the power
      supply to the internal core of the memory device.
      It is the main power supply for all operations
      (Read, Program and Erase).
      V
      DDQ
      Supply Voltage.
      V
      DDQ
      provides the power
      supply to the I/O pins and enables all Outputs to
      be powered independently from V
      DD
      . V
      DDQ
      can be
      tied to V
      DD
      or can use a separate supply.
      It is recommended to power-up and power-down
      V
      DD
      and V
      DDQ
      together to avoid any condition that
      would result in data corruption.
      V
      SS
      Ground.
      Ground, V
      SS,
      is the reference for
      the core power supply. It must be connected to the
      system ground.
      V
      SSQ
      Ground.
      V
      SSQ
      ground is the reference for
      the input/output circuitry driven by V
      DDQ
      . V
      SSQ
      must be connected to V
      SS
      .
      Note: Each device in a system should have
      V
      DD
      and
      V
      DDQ
      decoupled with a 0.1μF ceramic
      capacitor close to the pin (high frequency, in-
      herently low inductance capacitors should be
      as close as possible to the package). See Fig-
      ure 10, AC Measurement Load Circuit.
      Program/
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