LFE2-6E-5TN144CES Lattice Semiconductor, LFE2-6E-5TN144CES Datasheet - Page 27

• Manufacturer Part Number: LFE2-6E-5TN144CES
• Description: Semiconductors and Actives, programmable, Programmable Logic (FPGAs, PALs, CPLDs ...), gate
• Manufacturer: Lattice Semiconductor

Lattice Semiconductor
MULTADDSUB 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 2-25
shows the MULTADDSUB sysDSP element.
Figure 2-25. MULTADDSUB
Multiplicand A0
Multiplicand A1
Multiplier B0
Multiplier B1
Signed A
Signed B
Addn
Shift Register B Out
Shift Register B In
n
n
Input Data
Register B
Input Data
Register B
n
n
n
n
n
Register
Register
Register
Input
Input
Input
m
m
Input Data
Register A
Input Data
Register A
m
Shift Register A Out
m
m
Shift Register A In
m
m
Pipeline
Register
Register
Register
Pipeline
Pipeline
Pipe
Pipe
Pipe
Reg
Reg
Reg
m
n
m
n
2-24
To Add/Sub
To Add/Sub
To Add/Sub
Multiplier
Multiplier
Register
Pipeline
Register
Pipeline
x
x
(default)
(default)
m+n
m+n
LatticeECP2/M Family Data Sheet
Add/Sub
CLK (CLK0,CLK1,CLK2,CLK3)
CE (CE0,CE1,CE2,CE3)
RST(RST0,RST1,RST2,RST3)
(default)
m+n+1
(default)
m+n+1
Architecture
Output