LFEC15E-3FN256C Lattice, LFEC15E-3FN256C Datasheet - Page 20

• Manufacturer Part Number: LFEC15E-3FN256C
• Description: IC FPGA 15.3KLUTS 256FPBGA
• Manufacturer: Lattice

Specifications of LFEC15E-3FN256C

• Number Of Logic Elements/cells: *
• Number Of Labs/clbs: *
• Total Ram Bits: *
• Number Of I /o: *
• Number Of Gates: *
• Voltage - Supply: *
• Mounting Type: *
• Operating Temperature: *
• Package / Case: *
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Lattice Semiconductor
Figure 2-20. MAC sysDSP Element
MULTADD 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 A2. The user can enable the input, output and pipeline registers. Figure 2-21
shows the MULTADD sysDSP element.
Figure 2-21. MULTADD
Multiplicand
Multiplier
SignedAB
Addn
Accumsload
Shift Register B Out
Multiplicand A0
Multiplicand A1
Multiplier B0
Multiplier B1
Signed
Addn
Shift Register B In
Shift Register B Out
Shift Register B In
n
Register B
Input Data
n
n
Register B
Register B
Input Data
Input Data
n
n
n
n
n
n
Register
Register
Register
n
n
Input
Input
Input
Register
Register
m
Input
Input
Register A
Input Data
m
m
Register A
Register A
Input Data
Input Data
m
n
Shift Register A Out
Shift Register A In
m
Shift Register A Out
m
m
m
Register
Register
Pipeline
Pipeline
Register
Pipeline
Shift Register A In
m
m
Register
Pipeline
Register
Pipeline
m
n
Pipe
Pipe
Reg
Reg
m
n
m
n
Accumulator
Accumulator
Accumulator
2-17
Multiplier
To
To
To
Register
Pipeline
x
To Add/Sub
To Add/Sub
Multiplier
Multiplier
Register
Pipeline
Register
Pipeline
(default)
x
x
m+n
(default)
(default)
m+n
m+n
LatticeECP/EC Family Data Sheet
Accumulator
m+n+16 bits
Add/Sub
CLK (CLK0,CLK1,CLK2,CLK3)
CE (CE0,CE1,CE2,CE3)
RST(RST0,RST1,RST2,RST3)
CLK (CLK0,CLK1,CLK2,CLK3)
CE (CE0,CE1,CE2,CE3)
RST(RST0,RST1,RST2,RST3)
(default)
(default)
m+n+1
m+n+16 bits
(default)
(default)
m+n+1
Architecture
Output
Output
Overflow
signal