EP1S10F780C7 Altera, EP1S10F780C7 Datasheet - Page 77

IC STRATIX FPGA 10K LE 780-FBGA

EP1S10F780C7

Manufacturer Part Number
EP1S10F780C7
Description
IC STRATIX FPGA 10K LE 780-FBGA
Manufacturer
Altera
Series
Stratix®r
Datasheet

Specifications of EP1S10F780C7

Number Of Logic Elements/cells
10570
Number Of Labs/clbs
1057
Total Ram Bits
920448
Number Of I /o
426
Voltage - Supply
1.425 V ~ 1.575 V
Mounting Type
Surface Mount
Operating Temperature
0°C ~ 85°C
Package / Case
780-FBGA
Family Name
Stratix
Number Of Logic Blocks/elements
10570
# I/os (max)
426
Frequency (max)
420.17MHz
Process Technology
0.13um (CMOS)
Operating Supply Voltage (typ)
1.5V
Logic Cells
10570
Ram Bits
920448
Operating Supply Voltage (min)
1.425V
Operating Supply Voltage (max)
1.575V
Operating Temp Range
0C to 85C
Operating Temperature Classification
Commercial
Mounting
Surface Mount
Pin Count
780
Package Type
FBGA
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Number Of Gates
-
Lead Free Status / Rohs Status
Not Compliant
Other names
544-1112

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Altera Corporation
July 2005
Adder/Subtractor/Accumulator
The adder/subtractor/accumulator is the first level of the adder/output
block and can be used as an accumulator or as an adder/subtractor.
Adder/Subtractor
Each adder/subtractor/accumulator block can perform addition or
subtraction using the addnsub independent control signal for each first-
level adder in 18 × 18-bit mode. There are two addnsub[1..0] signals
available in a DSP block for any configuration. For 9 × 9-bit mode, one
addnsub[1..0] signal controls the top two one-level adders and
another addnsub[1..0] signal controls the bottom two one-level
adders. A high addnsub signal indicates addition, and a low signal
indicates subtraction. The addnsub control signal can be unregistered or
registered once or twice when feeding the adder blocks to match data
path pipelines.
The signa and signb signals serve the same function as the multiplier
block signa and signb signals. The only difference is that these signals
can be registered up to two times. These signals are tied to the same
signa and signb signals from the multiplier and must be connected to
the same clocks and control signals.
Accumulator
When configured for accumulation, the adder/output block output feeds
back to the accumulator as shown in
accum_sload[1..0] signal synchronously loads the multiplier result
to the accumulator output. This signal can be unregistered or registered
once or twice. Additionally, the overflow signal indicates the
accumulator has overflowed or underflowed in accumulation mode. This
signal is always registered and must be externally latched in LEs if the
design requires a latched overflow signal.
Summation
The output of the adder/subtractor/accumulator block feeds to an
optional summation block. This block sums the outputs of the DSP block
multipliers. In 9 × 9-bit mode, there are two summation blocks providing
the sums of two sets of four 9 × 9-bit multipliers. In 18 × 18-bit mode, there
is one summation providing the sum of one set of four 18 × 18-bit
multipliers.
Figure
Stratix Device Handbook, Volume 1
2–34. The
Stratix Architecture
2–63

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