lfe3-150ea-8fn672itw Lattice Semiconductor Corp., lfe3-150ea-8fn672itw Datasheet - Page 30
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lfe3-150ea-8fn672itw
Manufacturer Part Number
lfe3-150ea-8fn672itw
Description
Latticeecp3 Family Data Sheet
Manufacturer
Lattice Semiconductor Corp.
Datasheet
1.LFE3-150EA-8FN672ITW.pdf
(136 pages)
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Lattice Semiconductor
MULTADDSUB DSP Element
In this case, the operands AA and AB are multiplied and the result is added/subtracted with the result of the multi-
plier operation of operands BA and BB. The user can enable the input, output and pipeline registers. Figure 2-29
shows the MULTADDSUB sysDSP element.
Figure 2-29. MULTADDSUB
DSP Slice
Previous
Rounding
IR = Input Register
PR = Pipeline Register
OR = Output Register
FR = Flag Register
SRIB
SRIA
C_ALU
A_ALU
CIN
0
IR
C
IR
AA
MULTA
PR
OR
AMUX
A_ALU
IR
From FPGA Core
AB
To FPGA Core
0
R = Logic (B, C)
R= A ± B ± C
2-27
OR
PR
IR
OPCODE
FR
0
=
=
B_ALU
BMUX
IR
ALU
BA
MULTB
LatticeECP3 Family Data Sheet
PR
OR
IR
BB
IR
COUT
SROB
SROA
DSP Slice
Next
Architecture
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