LFXP2-5E-5FT256I LATTICE SEMICONDUCTOR, LFXP2-5E-5FT256I Datasheet - Page 6

• 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
Figure 2-2. PFU Diagram
Slice
Slice 0 through Slice 2 contain two 4-input combinatorial Look-Up Tables (LUT4), which feed two registers. Slice 3
contains two LUT4s and no registers. For PFUs, Slice 0 and Slice 2 can also be configured as distributed memory,
a capability not available in PFF blocks. 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 com-
bined to perform functions such as LUT5, LUT6, LUT7 and LUT8. There is control logic to perform set/reset func-
tions (programmable as synchronous/asynchronous), clock select, chip-select and wider RAM/ROM functions.
Figure 2-3 shows an overview of the internal logic of the slice. The registers in the slice can be configured as posi-
tive/negative edge triggered or level sensitive clocks.
Table 2-1. Resources and Modes Available per Slice
Slice 0 through Slice 2 have 14 input signals: 13 signals from routing and one from the carry-chain (from the adja-
cent slice or PFU). There are seven outputs: six to routing and one to carry-chain (to the adjacent PFU). Slice 3 has
13 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
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
Logic, Ripple, ROM
Slice 1
Logic, ROM
Modes
FF
LUT4 &
CARRY
D
Routing
Routing
From
2-3
To
FF
CARRY
LUT4 &
D
2 LUT4s and 2 Registers
Slice 2
Resources
2 LUT4s
FF
CARRY
LUT4 &
D
LatticeXP2 Family Data Sheet
PFF Block
LUT4
Slice 3
Logic, Ripple, ROM
Logic, Ripple, ROM
Logic, Ripple, ROM
Logic, ROM
LUT4
Modes
Architecture