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EPM1270GT144C5N 参数 Datasheet PDF下载

EPM1270GT144C5N图片预览
型号: EPM1270GT144C5N
PDF下载: 下载PDF文件 查看货源
内容描述: [Flash PLD, 10ns, 980-Cell, CMOS, PQFP144, 22 X 22 MM, 0.50 MM PITCH, LEAD FREE, TQFP-144]
分类和应用: 输入元件可编程逻辑
文件页数/大小: 88 页 / 982 K
品牌: INTEL [ INTEL ]
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Chapter 2: MAX II Architecture  
2–13  
MultiTrack Interconnect  
The R4 interconnects span four LABs and are used for fast row connections in a four-  
LAB region. Every LAB has its own set of R4 interconnects to drive either left or right.  
Figure 2–10 shows R4 interconnect connections from an LAB. R4 interconnects can  
drive and be driven by row IOEs. For LAB interfacing, a primary LAB or horizontal  
LAB neighbor can drive a given R4 interconnect. For R4 interconnects that drive to the  
right, the primary LAB and right neighbor can drive on to the interconnect. For R4  
interconnects that drive to the left, the primary LAB and its left neighbor can drive on  
to the interconnect. R4 interconnects can drive other R4 interconnects to extend the  
range of LABs they can drive. R4 interconnects can also drive C4 interconnects for  
connections from one row to another.  
Figure 2–10. R4 Interconnect Connections  
Adjacent LAB can  
drive onto another  
LAB’s R4 Interconnect  
R4 Interconnect  
Driving Right  
C4 Column Interconnects (1)  
R4 Interconnect  
Driving Left  
LAB  
Neighbor  
Primary  
LAB (2)  
LAB  
Neighbor  
Notes to Figure 2–10:  
(1) C4 interconnects can drive R4 interconnects.  
(2) This pattern is repeated for every LAB in the LAB row.  
The column interconnect operates similarly to the row interconnect. Each column of  
LABs is served by a dedicated column interconnect, which vertically routes signals to  
and from LABs and row and column IOEs. These column resources include:  
LUT chain interconnects within an LAB  
Register chain interconnects within an LAB  
C4 interconnects traversing a distance of four LABs in an up and down direction  
MAX II devices include an enhanced interconnect structure within LABs for routing  
LE output to LE input connections faster using LUT chain connections and register  
chain connections. The LUT chain connection allows the combinational output of an  
LE to directly drive the fast input of the LE right below it, bypassing the local  
interconnect. These resources can be used as a high-speed connection for wide fan-in  
© October 2008 Altera Corporation  
MAX II Device Handbook  
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