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      參數(shù)資料
      型號(hào): LFEC3E-3F900C
      廠商: Lattice Semiconductor Corporation
      英文描述: LatticeECP/EC Family Data Sheet
      中文描述: LatticeECP / EC的系列數(shù)據(jù)手冊
      文件頁數(shù): 28/117頁
      文件大?。?/td> 557K
      代理商: LFEC3E-3F900C
      2-25
      Architecture
      Lattice Semiconductor
      LatticeECP/EC Family Data Sheet
      Figure 2-28. Output Register Block
      Figure 2-29. ODDRXB Primitive
      Tristate Register Block
      The tristate register block provides the ability to register tri-state control signals from the core of the device before
      they are passed to the sysIO buffers. The block contains a register for SDR operation and an additional latch for
      DDR operation. Figure 2-30 shows the diagram of the Tristate Register Block.
      In SDR mode, ONEG1 feeds one of the
      fl
      ip-
      fl
      ops that then feeds the output. The
      fl
      ip-
      fl
      op can be con
      fi
      gured a D-
      type or latch. In DDR mode, ONEG1 is fed into one register on the positive edge of the clock and OPOS1 is
      latched. A multiplexer running off the same clock selects the correct register for feeding to the output (D0).
      D
      Q
      D
      D-Type
      /LATCH
      Q
      ONEG0
      From
      Routing
      CLK1
      Programmed
      Control
      DO
      Latch
      LE*
      *Latch is transparent when input is low.
      OPOS0
      OUTDDN
      0
      1
      0
      1
      To sysIO
      Buffer
      ODDRXB
      LSR
      Q
      DB
      CLK
      DA
      相關(guān)PDF資料
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      LFECP3E-3F900C LatticeECP/EC Family Data Sheet
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      相關(guān)代理商/技術(shù)參數(shù)
      參數(shù)描述
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