EP1S20F780I6N Altera, EP1S20F780I6N Datasheet - Page 572
EP1S20F780I6N
Manufacturer Part Number
EP1S20F780I6N
Description
IC STRATIX FPGA 20K LE 780-FBGA
Manufacturer
Altera
Series
Stratix®r
Specifications of EP1S20F780I6N
Number Of Logic Elements/cells
18460
Number Of Labs/clbs
1846
Total Ram Bits
1669248
Number Of I /o
586
Voltage - Supply
1.425 V ~ 1.575 V
Mounting Type
Surface Mount
Operating Temperature
-40°C ~ 100°C
Package / Case
780-FBGA
Family Name
Stratix
Number Of Logic Blocks/elements
18460
# I/os (max)
586
Frequency (max)
450.05MHz
Process Technology
0.13um (CMOS)
Operating Supply Voltage (typ)
1.5V
Logic Cells
18460
Ram Bits
1669248
Operating Supply Voltage (min)
1.425V
Operating Supply Voltage (max)
1.575V
Operating Temp Range
-40C to 100C
Operating Temperature Classification
Industrial
Mounting
Surface Mount
Pin Count
780
Package Type
FC-FBGA
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Number Of Gates
-
Lead Free Status / Rohs Status
Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
EP1S20F780I6N
Manufacturer:
ALTERA
Quantity:
3 000
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Operational Modes
Figure 6–12. Multiply Accumulator Mode
Note to
(1)
6–22
Stratix Device Handbook, Volume 2
Data B
Data A
The signa and signb signals are the same in the multiplier stage and the adder/output block.
shiftoutb
Figure
6–12:
shiftinb
shiftouta
ENA
ENA
D
D
CLRN
CLRN
shiftina
Q
Q
signa (1)
signb (1)
Multiply Accumulator Mode
In multiply accumulator mode, the output of the multiplier stage feeds
the adder/output block, which is configured as an accumulator or
subtractor (see
18-bit multiply accumulators in one DSP block. The Quartus II software
implements smaller multiplier-accumulators by tying the unused low-
order bits of an 18-bit multiplier to ground.
The multiply accumulator output can be up to 52 bits wide for a
maximum 36-bit result with 16-bits of accumulation. In this mode, the
DSP block uses output registers and the accum_sload and overflow
signals. The accum_sload[1..0] signal synchronously loads the
multiplier result to the accumulator output. This signal can be
unregistered or registered once or twice. The DSP block can then begin a
new accumulation without losing any clock cycles. The overflow signal
indicates an overflow or underflow in the accumulator. This signal is
clock
aclr
ena
Figure
ENA
D
CLRN
6–12). You can implement up to two independent
Q
accum_sload1
addnsub1
signa
signb
Accumulator
ENA
ENA
D
D
CLRN
CLRN
Altera Corporation
Q
Q
Data Out
overflow
July 2005
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