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EP2C8AT324I7N Datasheet(PDF) 46 Page - Altera Corporation

Part No. EP2C8AT324I7N
Description  Section I. Cyclone II Device Family Data Sheet
Download  168 Pages
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Manufacturer  ALTERA [Altera Corporation]
Direct Link  http://www.altera.com
Logo ALTERA - Altera Corporation

EP2C8AT324I7N Datasheet(HTML) 46 Page - Altera Corporation

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2–34
Altera Corporation
Cyclone II Device Handbook, Volume 1
February 2007
Embedded Multipliers
Figure 2–18. Multiplier Block Architecture
Note to Figure 2–18:
(1)
If necessary, these signals can be registered once to match the data signal path.
Each multiplier operand can be a unique signed or unsigned number.
Two signals, signa and signb, control the representation of each
operand respectively. A logic 1 value on the signa signal indicates that
data A is a signed number while a logic 0 value indicates an unsigned
number. Table 2–11 shows the sign of the multiplication result for the
various operand sign representations. The result of the multiplication is
signed if any one of the operands is a signed value.
CLRN
DQ
ENA
Data A
Data B
aclr
clock
ena
signa (1)
signb (1)
CLRN
DQ
ENA
CLRN
DQ
ENA
Data Out
Embedded Multiplier Block
Output
Register
Input
Register
Table 2–11. Multiplier Sign Representation
Data A (signa Value)
Data B (signb Value)
Result
Unsigned
Unsigned
Unsigned
Unsigned
Signed
Signed
Signed
Unsigned
Signed
Signed
Signed
Signed


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