EP1S30F780I6N Altera, EP1S30F780I6N Datasheet - Page 25

IC STRATIX FPGA 30K LE 780-FBGA

EP1S30F780I6N

Manufacturer Part Number
EP1S30F780I6N
Description
IC STRATIX FPGA 30K LE 780-FBGA
Manufacturer
Altera
Series
Stratix®r
Datasheet

Specifications of EP1S30F780I6N

Number Of Logic Elements/cells
32470
Number Of Labs/clbs
3247
Total Ram Bits
3317184
Number Of I /o
597
Voltage - Supply
1.425 V ~ 1.575 V
Mounting Type
Surface Mount
Operating Temperature
-40°C ~ 100°C
Package / Case
780-FBGA
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Number Of Gates
-

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0
Figure 2–7. LE in Dynamic Arithmetic Mode
Note to
(1)
Altera Corporation
July 2005
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 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 1 and carry-in of 0 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 an 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 delay between LAB carry-in generation (LE 5 and LE 10) are
now part of the critical path. This feature allows the Stratix 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)
Stratix Device Handbook, Volume 1
ADATA
ENA
D
ALD/PRE
aload
CLRN
Q
Stratix Architecture
Row, column, and
direct link routing
Row, column, and
direct link routing
Local routing
LUT chain
connection
Register
chain output
2–11