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EP2C8T144I8N Datasheet(PDF) 31 Page - Altera Corporation

Part No. EP2C8T144I8N
Description  Cyclone II Device Handbook, Volume 1
Download  470 Pages
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Manufacturer  ALTERA [Altera Corporation]
Direct Link  http://www.altera.com
Logo ALTERA - Altera Corporation

EP2C8T144I8N Datasheet(HTML) 31 Page - Altera Corporation

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Altera Corporation
2–5
February 2007
Cyclone II Device Handbook, Volume 1
Cyclone II Architecture
Figure 2–3. LE in Normal Mode
Arithmetic Mode
The arithmetic mode is ideal for implementing adders, counters,
accumulators, and comparators. An LE in arithmetic mode implements a
2-bit full adder and basic carry chain (see Figure 2–4). LEs in arithmetic
mode can drive out registered and unregistered versions of the LUT
output. Register feedback and register packing are supported when LEs
are used in arithmetic mode.
data1
Four-Input
LUT
data2
data3
cin (from cout
of previous LE)
data4
clock (LAB Wide)
ena (LAB Wide)
aclr (LAB Wide)
CLRN
D
Q
ENA
sclear
(LAB Wide)
sload
(LAB Wide)
Register chain
connection
Register
chain output
Row, Column, and
Direct Link Routing
Row, Column, and
Direct Link Routing
Local routing
Register Feedback
Packed Register Input


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