LFE3-95EA-8FN672I Lattice, LFE3-95EA-8FN672I Datasheet - Page 6

• Manufacturer Part Number: LFE3-95EA-8FN672I
• Description: IC FPGA 92KLUTS 380I/O 672-BGA
• Manufacturer: Lattice

Specifications of LFE3-95EA-8FN672I

• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Lattice Semiconductor
Figure 2-2. PFU Diagram
Slice
Slice 0 through Slice 2 contain two LUT4s feeding two registers, whereas Slice 3 contains two LUT4s only. For
PFUs, Slice 0 through Slice 2 can be configured as distributed memory, a capability not available in the PFF.
Table 2-1 shows the capability of the slices in both PFF and PFU blocks along with the operation modes they
enable. In addition, each PFU contains logic that allows the LUTs to be combined to perform functions such as
LUT5, LUT6, LUT7 and LUT8. There is control logic to perform set/reset functions (programmable as synchronous/
asynchronous), clock select, chip-select and wider RAM/ROM functions.
Table 2-1. Resources and Modes Available per Slice
Figure 2-3 shows an overview of the internal logic of the slice. The registers in the slice can be configured for posi-
tive/negative and edge triggered or level sensitive clocks.
Slices 0, 1 and 2 have 14 input signals: 13 signals from routing and one from the carry-chain (from the adjacent
slice or PFU). There are seven outputs: six to routing and one to carry-chain (to the adjacent PFU). Slice 3 has 10
input signals from routing and four signals to routing. Table 2-2 lists the signals associated with Slice 0 to Slice 2.
Slice 0
Slice 1
Slice 2
Slice 3
Slice
2 LUT4s and 2 Registers Logic, Ripple, RAM, ROM 2 LUT4s and 2 Registers
2 LUT4s and 2 Registers Logic, Ripple, RAM, ROM 2 LUT4s and 2 Registers
2 LUT4s and 2 Registers Logic, Ripple, RAM, ROM 2 LUT4s and 2 Registers
FF
LUT4 &
CARRY
D
Slice 0
Resources
2 LUT4s
FF
LUT4 &
CARRY
D
PFU BLock
FF
LUT4 &
CARRY
D
Slice 1
Logic, ROM
Modes
LUT4 &
CARRY
FF
D
Routing
Routing
From
2-3
To
FF
CARRY
LUT4 &
D
Slice 2
Resources
2 LUT4s
FF
CARRY
LUT4 &
D
LatticeECP3 Family Data Sheet
PFF Block
LUT4
Slice 3
Logic, Ripple, ROM
Logic, Ripple, ROM
Logic, Ripple, ROM
Logic, ROM
LUT4
Modes
Architecture