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| 型號： | LC4256V-3F256AC |
| 文件頁數： | 6/57頁 |
| 文件大小： | 1078K |
| 代理商： | LC4256V-3F256AC |
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Lattice Semiconductor
ispMACH 4000V/B/C Family Data Sheet
6
Table 4. Product Term Expansion Capability
Every time the super cluster allocator is used, there is an incremental delay of t
tor is used, all destinations other than the one being steered to, are given the value of ground (i.e., if the super clus-
ter is steered to M (n+4), then M (n) is ground).
EXP
. When the super cluster alloca-
Macrocell
The 16 macrocells in the GLB are driven by the 16 outputs from the logic allocator. Each macrocell contains a pro-
grammable XOR gate, a programmable register/latch, along with routing for the logic and control functions. Figure
5 shows a graphical representation of the macrocell. The macrocells feed the ORP and GRP. A direct input from
the I/O cell allows designers to use the macrocell to construct high-speed input registers. A programmable delay in
this path allows designers to choose between the fastest possible set-up time and zero hold time.
Figure 5. Macrocell
Enhanced Clock Multiplexer
The clock input to the
fl
ip-
fl
op can select any of the four block clocks along with the shared PT clock, and true and
complement forms of the optional individual term clock. An 8:1 multiplexer structure is used to select the clock. The
eight sources for the clock multiplexer are as follows:
Block CLK0
Block CLK1
Expansion
Chains
Chain-0
Chain-1
Chain-2
Chain-3
Macrocells Associated with Expansion Chain
(with Wrap Around)
M0
→
M4
→
M8
M1
→
M5
→
M9
M2
→
M6
→
M10
M3
→
M7
→
M11
Max PT/
Macrocell
75
80
75
70
→
M12
M13
M14
M15
→
M0
M1
M2
M3
→
→
→
→
→
→
Single PT
Block CLK0
Block CLK1
Block CLK2
Block CLK3
PT Clock (optional)
Shared PT Clock
CE
D/T/L
Q
R
P
Shared PT Initialization
PT Initialization/CE (optional)
PT Initialization (optional)
From Logic Allocator
Power-up
Initialization
To ORP
To GRP
From I/O Cell
Delay
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| LC4256V-3T100C | |
| LC4256V-3T176C | |
| LC4256V-5F256AC | |
| LC4256V-5F256AI | |
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相關代理商/技術參數 |
參數描述 |
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| LC4256V-3F256AC1 | 制造商:LATTICE 制造商全稱:Lattice Semiconductor 功能描述:3.3V/2.5V/1.8V In-System Programmable SuperFAST High Density PLDs |
| LC4256V-3F256BC | 功能描述:CPLD - 復雜可編程邏輯器件 PROGRAMMABLE SUPER FAST HI DENSITY PLD RoHS:否 制造商:Lattice 系列: 存儲類型:EEPROM 大電池數量:128 最大工作頻率:333 MHz 延遲時間:2.7 ns 可編程輸入/輸出端數量:64 工作電源電壓:3.3 V 最大工作溫度:+ 90 C 最小工作溫度:0 C 封裝 / 箱體:TQFP-100 |
| LC4256V-3F256BC1 | 制造商:LATTICE 制造商全稱:Lattice Semiconductor 功能描述:3.3V/2.5V/1.8V In-System Programmable SuperFAST High Density PLDs |
| LC4256V-3FN256AC | 功能描述:CPLD - 復雜可編程邏輯器件 PROGRAMMABLE SUPER FAST HI DENSITY PLD RoHS:否 制造商:Lattice 系列: 存儲類型:EEPROM 大電池數量:128 最大工作頻率:333 MHz 延遲時間:2.7 ns 可編程輸入/輸出端數量:64 工作電源電壓:3.3 V 最大工作溫度:+ 90 C 最小工作溫度:0 C 封裝 / 箱體:TQFP-100 |
| LC4256V-3FN256AC1 | 制造商:LATTICE 制造商全稱:Lattice Semiconductor 功能描述:3.3V/2.5V/1.8V In-System Programmable SuperFAST High Density PLDs |
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