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EP2C8AT324I7N Datasheet(PDF) 45 Page - Altera Corporation

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

EP2C8AT324I7N Datasheet(HTML) 45 Page - Altera Corporation

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Altera Corporation
2–33
February 2007
Cyclone II Device Handbook, Volume 1
Cyclone II Architecture
Embedded multipliers can operate at up to 250 MHz (for the fastest speed
grade) for 18 × 18 and 9 × 9 multiplications when using both input and
output registers.
Each Cyclone II device has one to three columns of embedded multipliers
that efficiently implement multiplication functions. An embedded
multiplier spans the height of one LAB row. Table 2–10 shows the number
of embedded multipliers in each Cyclone II device and the multipliers
that can be implemented.
The embedded multiplier consists of the following elements:
Multiplier block
Input and output registers
Input and output interfaces
Figure 2–18 shows the multiplier block architecture.
Table 2–10. Number of Embedded Multipliers in Cyclone II Devices
Note (1)
Device
Embedded
Multiplier Columns
Embedded
Multipliers
9 × 9 Multipliers
18 × 18 Multipliers
EP2C5
1
13
26
13
EP2C8
1
18
36
18
EP2C15
1
26
52
26
EP2C20
1
26
52
26
EP2C35
1
35
70
35
EP2C50
2
86
172
86
EP2C70
3
150
300
150
Note to Table 2–10:
(1)
Each device has either the number of 9 × 9-, or 18 × 18-bit multipliers shown. The total number of multipliers for
each device is not the sum of all the multipliers.


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