參數(shù)資料
型號: LFXP20E-5FN484C
廠商: LATTICE SEMICONDUCTOR CORP
元件分類: FPGA
中文描述: FPGA, 2464 CLBS, PBGA484
封裝: 23 X 23 MM, LEAD FREE, FPBGA-484
文件頁數(shù): 87/130頁
文件大?。?/td> 1312K
代理商: LFXP20E-5FN484C
2-3
Architecture
Lattice Semiconductor
LatticeXP Family Data Sheet
Slice
Each slice contains two LUT4 lookup tables feeding two registers (programmed to be in FF or Latch mode), and
some associated 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. Figure 2-3 shows an overview of the internal logic of the slice.
The registers in the slice can be configured for positive/negative and edge/level clocks.
There are 14 input signals: 13 signals from routing and one from the carry-chain (from adjacent slice or PFU).
There are 7 outputs: 6 to routing and one to carry-chain (to adjacent PFU). Table 2-1 lists the signals associated
with each slice.
Figure 2-3. Slice Diagram
LUT4 &
CARRY
LUT4 &
CARRY
Slice
A0
B0
C0
D0
FF/
Latch
OFX0
F0
Q0
A1
B1
C1
D1
CI
CO
F
SUM
CE
CLK
LSR
FF/
Latch
OFX1
F1
Q1
F
SUM
D
M1
To / From
Different slice / PFU Fast Carry Out (FCO)
To / From
Different slice / PFU Fast Carry In (FCI)
LUT
Expansion
Mux
M0
OFX0
From
Routing
To
Routing
Control Signals
selected and
inverted per
slice in routing
Note: Some interslice signals
are not shown.
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