EP1C3T100C7 Altera, EP1C3T100C7 Datasheet - Page 16

IC CYCLONE FPGA 2910 LE 100-TQFP

EP1C3T100C7

Manufacturer Part Number
EP1C3T100C7
Description
IC CYCLONE FPGA 2910 LE 100-TQFP
Manufacturer
Altera
Series
Cyclone®r
Datasheet

Specifications of EP1C3T100C7

Number Of Logic Elements/cells
2910
Number Of Labs/clbs
291
Total Ram Bits
59904
Number Of I /o
65
Voltage - Supply
1.425 V ~ 1.575 V
Mounting Type
Surface Mount
Operating Temperature
0°C ~ 85°C
Package / Case
100-TQFP, 100-VQFP
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Number Of Gates
-
Other names
544-1015

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Cyclone Device Handbook, Volume 1
Figure 2–7. LE in Dynamic Arithmetic Mode
Note to
(1)
2–10
Preliminary
LAB Carry-In
Carry-In0
Carry-In1
The addnsub signal is tied to the carry input for the first LE of a carry chain only.
data1
data2
data3
(LAB Wide)
addnsub
Figure
(1)
2–7:
Carry-Out0
Carry-Select Chain
The carry-select chain provides a very fast carry-select function between
LEs in dynamic arithmetic mode. The carry-select chain uses the
redundant carry calculation to increase the speed of carry functions. The
LE is configured to calculate outputs for a possible carry-in of 0 and
carry-in of 1 in parallel. The carry-in0 and carry-in1 signals from a
lower-order bit feed forward into the higher-order bit via the parallel
carry chain and feed into both the LUT and the next portion of the carry
chain. Carry-select chains can begin in any LE within a LAB.
The speed advantage of the carry-select chain is in the parallel
pre-computation of carry chains. Since the LAB carry-in selects the
precomputed carry chain, not every LE is in the critical path. Only the
propagation delays between LAB carry-in generation (LE 5 and LE 10) are
now part of the critical path. This feature allows the Cyclone architecture
to implement high-speed counters, adders, multipliers, parity functions,
and comparators of arbitrary width.
LUT
LUT
LUT
LUT
Carry-Out1
Register chain
connection
clock (LAB Wide)
(LAB Wide)
ena (LAB Wide)
aclr (LAB Wide)
sload
(LAB Wide)
Register Feedback
sclear
(LAB Wide)
ADATA
ENA
D
ALD/PRE
aload
CLRN
Q
Altera Corporation
Row, column, and
direct link routing
Row, column, and
direct link routing
Local routing
LUT chain
connection
Register
chain output
May 2008

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