LFE2-50E-6F484C Lattice, LFE2-50E-6F484C Datasheet - Page 28
LFE2-50E-6F484C
Manufacturer Part Number
LFE2-50E-6F484C
Description
IC FPGA 50KLUTS 339I/O 484-BGA
Manufacturer
Lattice
Datasheet
1.LFE2-12E-5FN256C.pdf
(385 pages)
Specifications of LFE2-50E-6F484C
Lead Free Status / Rohs Status
Contains lead / RoHS non-compliant
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Part Number:
LFE2-50E-6F484C
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Lattice Semiconductor
MULTADDSUBSUM sysDSP Element
In this case, the operands A0 and B0 are multiplied and the result is added/subtracted with the result of the multi-
plier operation of operands A1 and B1. Additionally the operands A2 and B2 are multiplied and the result is added/
subtracted with the result of the multiplier operation of operands A3 and B3. The result of both addition/subtraction
are added in a summation block. The user can enable the input, output and pipeline registers. Figure 2-26 shows
the MULTADDSUBSUM sysDSP element.
Figure 2-26. MULTADDSUBSUM
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
Multiplicand A0
Multiplicand A1
Multiplicand A2
Multiplicand A3
Multiplier B0
Multiplier B1
Multiplier B2
Multiplier B3
Signed A
Signed B
Shift Register B Out
Addn0
Addn1
Shift Register B In
n
n
n
n
Register B
Register B
Register B
Register B
Input Data
Input Data
Input Data
Input Data
n
n
n
n
n
n
n
n
n
Register
Register
Register
Register
Input
Input
Input
Input
m
m
m
m
Input Data
Register A
Input Data
Register A
Input Data
Register A
Input Data
Register A
m
m
m
m
m
Shift Register A Out
Shift Register A In
m
m
m
m
Register
Register
Register
Register
Pipeline
Pipeline
Pipeline
Pipeline
m
n
n
n
m
n
m
n
2-25
Multiplier
Multiplier
Multiplier
Multiplier
To Add/Sub1
To Add/Sub0, Add/Sub1
To Add/Sub0, Add/Sub1
To Add/Sub0
Pipeline
Register
Pipeline
Register
x
x
x
x
Register
Register
Pipeline
Pipeline
(default)
(default)
m+n
m+n
(default)
(default)
m+n
m+n
Add/Sub0
Add/Sub1
LatticeECP2/M Family Data Sheet
CLK (CLK0,CLK1,CLK2,CLK3)
CE (CE0,CE1,CE2,CE3)
RST(RST0,RST1,RST2,RST3)
m+n+1
m+n+1
SUM
m+n+2
m+n+2
Architecture
Output
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