EP1S25F1020C7N Altera, EP1S25F1020C7N Datasheet - Page 81
EP1S25F1020C7N
Manufacturer Part Number
EP1S25F1020C7N
Description
IC STRATIX FPGA 25K LE 1020-FBGA
Manufacturer
Altera
Series
Stratix®r
Datasheet
1.EP1S10F780C7.pdf
(276 pages)
Specifications of EP1S25F1020C7N
Number Of Logic Elements/cells
25660
Number Of Labs/clbs
2566
Total Ram Bits
1944576
Number Of I /o
706
Voltage - Supply
1.425 V ~ 1.575 V
Mounting Type
Surface Mount
Operating Temperature
0°C ~ 85°C
Package / Case
1020-FBGA
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Number Of Gates
-
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Figure 2–37. Multiply-Accumulate Mode
Notes to
(1)
(2)
Altera Corporation
July 2005
Data B
Data A
These signals are not registered or registered once to match the data path pipeline.
These signals are not registered, registered once, or registered twice for latency to match the data path pipeline.
Shiftout B Shiftout A
Figure
Shiftin B
2–37:
ENA
ENA
D
D
CLRN
CLRN
Shiftin A
Q
Q
signa (1)
signb (1)
clock
Multiply-Accumulator Mode
In multiply-accumulator mode (see
multiplied results to the adder/subtractor/accumulator block configured
as an accumulator. You can implement one or two multiply-accumulators
up to 18 × 18 bits in one DSP block. The first and third multiplier sub-
blocks are unused in this mode, because only one multiplier can feed one
of two accumulators. The multiply-accumulator output can be up to 52
bits—a maximum of a 36-bit result with 16 bits of accumulation. The
accum_sload and overflow signals are only available in this mode.
The addnsub signal can set the accumulator for decimation and the
overflow signal indicates underflow condition.
Two-Multipliers Adder Mode
The two-multipliers adder mode uses the adder/subtractor/accumulator
block to add or subtract the outputs of the multiplier block, which is
useful for applications such as FFT functions and complex FIR filters. A
ena
aclr
ENA
D
CLRN
Q
accum_sload (2)
addnsub (2)
signa (2)
signb (2)
Figure
Accumulator
Stratix Device Handbook, Volume 1
2–37), the DSP block drives
ENA
D
CLRN
Stratix Architecture
Q
Data Out
overflow
2–67
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