EP1S80F1020C7N Altera, EP1S80F1020C7N Datasheet - Page 74
EP1S80F1020C7N
Manufacturer Part Number
EP1S80F1020C7N
Description
IC STRATIX FPGA 80K LE 1020-FBGA
Manufacturer
Altera
Series
Stratix®r
Datasheet
1.EP1S10F780C7.pdf
(276 pages)
Specifications of EP1S80F1020C7N
Number Of Logic Elements/cells
79040
Number Of Labs/clbs
7904
Total Ram Bits
7427520
Number Of I /o
773
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
-
Available stocks
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Part Number
Manufacturer
Quantity
Price
Part Number:
EP1S80F1020C7N
Manufacturer:
ALTERA/阿尔特拉
Quantity:
20 000
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Digital Signal Processing Block
2–60
Stratix Device Handbook, Volume 1
Table 2–14
Multiplier
The multiplier supports 9 × 9-, 18 × 18-, or 36 × 36-bit multiplication. Each
DSP block supports eight possible 9 × 9-bit or smaller multipliers. There
are four multiplier blocks available for multipliers larger than 9 × 9 bits
but smaller than 18 × 18 bits. There is one multiplier block available for
multipliers larger than 18 × 18 bits but smaller than or equal to 36 × 36
bits. The ability to have several small multipliers is useful in applications
such as video processing. Large multipliers greater than 18 × 18 bits are
useful for applications such as the mantissa multiplication of a single-
precision floating-point number.
The multiplier operands can be signed or unsigned numbers, where the
result is signed if either input is signed as shown in
sign_a and sign_b signals provide dynamic control of each operand’s
representation: a logic 1 indicates the operand is a signed number, a logic
0 indicates the operand is an unsigned number. These sign signals affect
all multipliers and adders within a single DSP block and you can register
them to match the data path pipeline. The multipliers are full precision
(that is, 18 bits for the 18-bit multiply, 36-bits for the 36-bit multiply, and
so on) regardless of whether sign_a or sign_b set the operands as
signed or unsigned numbers.
Parallel input
Shift register input
Table 2–14. Input Register Modes
Table 2–15. Multiplier Signed Representation
Register Input Mode
Unsigned
Unsigned
Data A
Signed
Signed
shows the summary of input register modes for the DSP block.
9 × 9
v
v
Unsigned
Unsigned
Data B
Signed
Signed
18 × 18
v
v
Table
Altera Corporation
Unsigned
Signed
Signed
Signed
Result
2–15. The
36 × 36
v
July 2005
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