LFXP2-5E-5FT256I LATTICE SEMICONDUCTOR, LFXP2-5E-5FT256I Datasheet - Page 25

• Manufacturer Part Number: LFXP2-5E-5FT256I
• Description: FPGA LatticeXP2 Family 5000 Cells Flash Technology 1.2V 256-Pin FTBGA
• Manufacturer: LATTICE SEMICONDUCTOR

Specifications of LFXP2-5E-5FT256I

• Package: 256FTBGA
• Family Name: LatticeXP2
• Device Logic Units: 5000
• Typical Operating Supply Voltage: 1.2 V
• Maximum Number Of User I/os: 172
• Ram Bits: 169984
• Re-programmability Support: Yes

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 B1. The user can enable the input, output and pipeline registers. Figure 2-22
shows the MULTADDSUB sysDSP element.
Figure 2-22. 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
2-22
To Add/Sub
To Add/Sub
To Add/Sub
Multiplier
Multiplier
Register
Pipeline
Register
Pipeline
x
x
(default)
(default)
m+n
m+n
CLK (CLK0,CLK1,CLK2,CLK3)
CE (CE0,CE1,CE2,CE3)
RST (RST0,RST1,RST2,RST3)
Add/Sub
LatticeXP2 Family Data Sheet
(default)
m+n+1
(default)
m+n+1
Architecture
Output