epm2210gm100i Altera Corporation, epm2210gm100i Datasheet - Page 22
epm2210gm100i
Manufacturer Part Number
epm2210gm100i
Description
Section I. Max Ii Device Family Data Sheet
Manufacturer
Altera Corporation
Datasheet
1.EPM2210GM100I.pdf
(108 pages)
- Current page: 22 of 108
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Logic Elements
Figure 2–9. Carry-Select Chain
2–14Core Version a.b.c variable
MAX II Device Handbook, Volume 1
LAB Carry-In
A1
B1
A2
B2
A3
B3
A4
B4
A5
B5
A6
B6
A7
B7
A8
B8
A9
B9
A10
B10
LAB Carry-Out
0
0
LE0
LE1
LE2
LE3
LE4
LE5
LE6
LE7
LE8
LE9
1
1
Sum1
Sum2
Sum3
Sum4
Sum5
Sum6
Sum7
Sum8
Sum9
Sum10
The Quartus II software automatically creates carry chain logic during
design processing, or you can create it manually during design entry.
Parameterized functions such as LPM functions automatically take
advantage of carry chains for the appropriate functions. The Quartus II
software creates carry chains longer than 10 LEs by linking adjacent LABs
within the same row together automatically. A carry chain can extend
horizontally up to one full LAB row, but does not extend between LAB
rows.
To top of adjacent LAB
LAB Carry-In
Carry-In0
Carry-In1
data1
data2
Carry-Out0
LUT
LUT
LUT
LUT
Carry-Out1
Altera Corporation
Sum
March 2008
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