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5M1270ZT64I4N 参数 Datasheet PDF下载

5M1270ZT64I4N图片预览
型号: 5M1270ZT64I4N
PDF下载: 下载PDF文件 查看货源
内容描述: MAX V器件手册 [MAX V Device Handbook]
分类和应用:
文件页数/大小: 166 页 / 4016 K
品牌: ALTERA [ ALTERA CORPORATION ]
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Chapter 2: MAX V Architecture  
2–7  
Logic Array Blocks  
With the LAB-wide addnsubcontrol signal, a single LE can implement a one-bit adder  
and subtractor. This signal saves LE resources and improves performance for logic  
functions such as correlators and signed multipliers that alternate between addition  
and subtraction depending on data.  
The LAB column clocks [3..0], driven by the global clock network, and LAB local  
interconnect generate the LAB-wide control signals. The MultiTrack interconnect  
structure drives the LAB local interconnect for non-global control signal generation.  
The MultiTrack interconnect’s inherent low skew allows clock and control signal  
distribution in addition to data signals. Figure 2–5 shows the LAB control signal  
generation circuit.  
Figure 2–5. LAB-Wide Control Signals  
Dedicated  
LAB Column  
Clocks  
4
Local  
Interconnect  
Local  
Interconnect  
Local  
Interconnect  
Local  
Interconnect  
Local  
Interconnect  
labclkena2  
labclkena1  
syncload  
labclr2  
addnsub  
Local  
Interconnect  
labclk1  
labclk2  
asyncload  
or labpre  
labclr1  
synclr  
December 2010 Altera Corporation  
MAX V Device Handbook  
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