LFEC10E-3F256C Lattice Semiconductor Corp., LFEC10E-3F256C Datasheet - Page 24
LFEC10E-3F256C
Manufacturer Part Number
LFEC10E-3F256C
Description
Latticeecp/ec Family of Fpga Devices Has Been Optimized to Deliver Mainstream Fpga Features at Low Cost.for Maximum Performance And Value, The Latticeecp (EConomy Plus) Fpga Concept Combines an Efficient Fpgafabric With High-speed Dedicated Functions
Manufacturer
Lattice Semiconductor Corp.
Datasheet
1.LFEC10E-3F256C.pdf
(231 pages)
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MULT sysDSP Element
This multiplier element implements a multiply with no addition or accumulator nodes. The two operands, A and B,
are multiplied and the result is available at the output. The user can enable the input/output and pipeline registers.
Figure 2-14 shows the MULT sysDSP element.
Figure 2-14. MULT sysDSP Element
MAC sysDSP Element
In this case the two operands, A and B, are multiplied and the result is added with the previous accumulated value.
This accumulated value is available at the output. The user can enable the input and pipeline registers but the out-
put register is always enabled. The output register is used to store the accumulated value. A registered overflow
signal is also available. The overflow conditions are provided later in this document. Figure 2-15 shows the MAC
sysDSP element.
Multiplicand
Multiplier
Signed
Shift Register B Out
Shift Register B In
n
Input Data
Register B
n
n
n
Register
Input
m
Register A
Input Data
m
m
Shift Register A Out
m
Shift Register A In
2-14
Register
Pipeline
m
n
Multiplier
Register
Pipeline
x
CLK (CLK0,CLK1,CLK2,CLK3)
CE (CE0,CE1,CE2,CE3)
RST(RST0,RST1,RST2,RST3)
Multiplier
LatticeECP/EC Family Data Sheet
To
(default)
m+n
m+n
Output
Architecture
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