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    參數(shù)資料
    型號: LFEC6E-5F672C
    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): 21/117頁
    文件大小: 557K
    代理商: LFEC6E-5F672C
    2-18
    Architecture
    Lattice Semiconductor
    LatticeECP/EC Family Data Sheet
    Figure 2-21. MULTADDSUM
    Clock, Clock Enable and Reset Resources
    Global Clock, Clock Enable and Reset signals from routing are available to every DSP block. Four Clock, Reset
    and Clock Enable signals are selected for the sysDSP block. From four clock sources (CLK0, CLK1, CLK2, CLK3)
    one clock is selected for each input register, pipeline register and output register. Similarly Clock enable (CE) and
    Reset (RST) are selected from their four respective sources (CE0, CE1, CE2, CE3 and RST0, RST1, RST2, RST3)
    at each input register, pipeline register and output register.
    Signed and Unsigned with Different Widths
    The DSP block supports different widths of signed and unsigned multipliers besides x9, x18 and x36 widths. For
    unsigned operands, unused upper data bits should be
    fi
    lled to create a valid x9, x18 or x36 operand. For signed
    two’s complement operands, sign extension of the most signi
    fi
    cant bit should be performed until x9, x18 or x36
    width is reached. Table 2-8 provides an example of this.
    Multiplier
    x
    Add/Sub0
    n
    m
    m+n
    (default)
    m+n
    (default)
    m+n+1
    m+n+2
    m+n+2
    m+n+1
    m+n
    (default)
    m+n
    (default)
    m
    n
    m
    n
    m
    n
    n
    m
    x
    n
    n
    m
    n
    n
    m
    Multiplier
    x
    Multiplier
    Multiplier
    x
    Add/Sub1
    n
    m
    m
    n
    m
    n
    m
    n
    n
    m
    n
    m
    m
    n
    m
    n
    n
    m
    SUM
    Multiplier B0
    Multiplicand A0
    Multiplier B1
    Multiplicand A1
    Multiplier B2
    Multiplicand A2
    Multiplier B3
    Multiplicand A3
    Signed
    Shift Register B In
    Output
    Addn0
    Pipeline
    Register
    CLK (CLK0,CLK1,CLK2,CLK3)
    CE (CE0,CE1,CE2,CE3)
    RST(RST0,RST1,RST2,RST3)
    Input
    Register
    Pipeline
    Register
    Input
    Register
    To Add/Sub0
    To Add/Sub0, Add/Sub1
    Pipeline
    Register
    Pipeline
    Register
    Input
    Register
    To Add/Sub1
    Addn1
    Pipeline
    Register
    Pipeline
    Register
    Pipeline
    Register
    Shift Register A In
    Shift Register B Out
    Shift Register A Out
    Input Data
    Register A
    Input Data
    Register A
    Input Data
    Register A
    Input Data
    Register A
    Input Data
    Register B
    Input Data
    Register B
    Input Data
    Register B
    Input Data
    Register B
    O
    R
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