參數(shù)資料
型號(hào): LFECP33E-3F672C
廠商: LATTICE SEMICONDUCTOR CORP
元件分類: FPGA
英文描述: LatticeECP/EC Family Data Sheet
中文描述: FPGA, 4096 CLBS, 32800 GATES, 420 MHz, PBGA672
封裝: 27 X 27 MM, FPBGA-672
文件頁數(shù): 18/117頁
文件大小: 557K
代理商: LFECP33E-3F672C
2-15
Architecture
Lattice Semiconductor
LatticeECP/EC Family Data Sheet
Figure 2-17. Comparison of General DSP and LatticeECP-DSP Approaches
sysDSP Block Capabilities
The sysDSP block in the LatticeECP-DSP family supports four functional elements in three 9, 18 and 36 data path
widths. The user selects a function element for a DSP block and then selects the width and type (signed/unsigned)
of its operands. The operands in the LatticeECP-DSP family sysDSP Blocks can be either signed or unsigned but
not mixed within a function element. Similarly, the operand widths cannot be mixed within a block.
The resources in each sysDSP block can be con
fi
gured to support the following four elements:
MULT
MAC
MULTADD
MULTADDSUM (Multiply, Addition/Subtraction, Accumulate)
(Multiply)
(Multiply, Accumulate)
(Multiply, Addition/Subtraction)
The number of elements available in each block depends in the width selected from the three available options x9,
x18, and x36. A number of these elements are concatenated for highly parallel implementations of DSP functions.
Table 2-1 shows the capabilities of the block.
Table 2-7. Maximum Number of Elements in a Block
Some options are available in four elements. The input register in all the elements can be directly loaded or can be
loaded as shift register from previous operand registers. In addition by selecting ‘dynamic operation’ in the ‘Signed/
Unsigned’ options the operands can be switched between signed and unsigned on every cycle. Similarly by select-
ing ‘Dynamic operation’ in the ‘Add/Sub’ option the Accumulator can be switched between addition and subtraction
on every cycle.
Width of Multiply
MULT
MAC
MULTADD
MULTADDSUM
x9
8
4
4
2
x18
4
2
2
1
x36
1
Multiplier 0
Operand
A
Operand
B
Operand
A
Operand
B
Operand
A
Operand
B
Multiplier 1
Multiplier
(k-1)
Accumulator
Output
m/k
loops
Single
Multiplier
x
x
x
x
Operand
A
Accumulator
Operand
B
M loops
Function implemented in
General purpose DSP
Function implemented
in LatticeECP
Σ
Σ
相關(guān)PDF資料
PDF描述
LFEC33E-3F672I LatticeECP/EC Family Data Sheet
LFECP33E-3F672I LatticeECP/EC Family Data Sheet
LFEC33E-3F900C LatticeECP/EC Family Data Sheet
LFECP33E-3F900C LatticeECP/EC Family Data Sheet
LFEC33E-3F900I LatticeECP/EC Family Data Sheet
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參數(shù)描述
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