Altera Cyclone IV - Architecture

4–2 Chapter 4: Embedded Multipliers in Cyclone IV Devices
Architecture
Cyclone IV Device Handbook, February 2010 Altera Corporation
Volume 1
Tab le 4 –1 lists the number of embedded multipliers and the multiplier modes that can
be implemented in each Cyclone IV device.
In addition to the embedded multipliers in Cyclone IV devices, you can implement
soft multipliers by using the M9K memory blocks as look-up tables (LUTs). The LUTs
contain partial results from the multiplication of input data with coefficients that
implement variable depth and width high-performance soft multipliers for low-cost,
high-volume DSP applications. The availability of soft multipliers increases the
number of available multipliers in the device.
f For more information about M9K memory blocks, refer to the Memory Blocks in
Cyclone IV Devices chapter.
f For more information about soft multipliers, refer to AN 306: Implementing Multipliers
in FPGA Devices.
Architecture
Each embedded multiplier consists of the following elements:
■ Multiplier stage
■ Input and output registers
■ Input and output interfaces
Table 4–1. Number of Embedded Multipliers in Cyclone IV Devices
Device Family Device
Embedded
Multipliers
9
× 9
Multipliers
(1)
18 × 18
Multipliers
(1)
Cyclone IV GX
EP4CGX15 0 0 0
EP4CGX22 40 80 40
EP4CGX30 80 160 80
EP4CGX50 140 280 140
EP4CGX75 198 396 198
EP4CGX110 280 560 280
EP4CGX150 360 720 360
Cyclone IV E
EP4CE6 15 30 15
EP4CE10 23 46 23
EP4CE15 56 112 56
EP4CE22 66 132 66
EP4CE30 66 132 66
EP4CE40 116 232 116
EP4CE55 154 308 154
EP4CE75 200 400 200
EP4CE115 266 532 266
Note to Table 4–1:
(1) These columns show the number of 9 × 9 or 18 × 18 multipliers for each device.