DSP Block Resource

Multiplier Size (Bit)

Usage Example

1

One 27 x 27 with

accumulate

High precision fixed- or floating-point

implementations

You can configure each DSP block during compilation as independent three 9 x 9, two 18 x 18, or one 27 x 27

multipliers. With a dedicated 64 bit cascade bus, you can cascade multiple variable-precision DSP blocks to

implement even higher precision DSP functions efficiently.

Table 17: Number of Multipliers in Cyclone V Devices

The table lists the variable-precision DSP resources by bit precision for each Cyclone V device.

18 x 18

Multiplier Adder

Summed with

36 bit Input

18 x 18

Multiplier

Adder

Mode

Independent Input and Output

Multiplications Operator

Variable-

precision

DSP Block

Member

Code

Variant

27 x 27

Multiplier

18 x 18

Multiplier

9 x 9

Multiplier

25

25

25

50

75

25

A2

Cyclone V E

66

66

66

132

198

66

A4

150

150

150

300

450

150

A5

156

156

156

312

468

156

A7

342

342

342

684

1,026

342

A9

51

51

51

102

153

51

C3

Cyclone V GX

70

70

70

140

210

70

C4

150

150

150

300

450

150

C5

156

156

156

312

468

156

C7

342

342

342

684

1,026

342

C9

150

150

150

300

450

150

D5

Cyclone V GT

156

156

156

312

468

156

D7

342

342

342

684

1,026

342

D9

36

36

36

72

108

36

A2

Cyclone V SE

84

84

84

168

252

84

A4

87

87

87

174

261

87

A5

112

112

112

224

336

112

A6

36

36

36

72

108

36

C2

Cyclone V SX

84

84

84

168

252

84

C4

87

87

87

174

261

87

C5

112

112

112

224

336

112

C6

Altera Corporation

Cyclone V Device Overview

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19

Variable-Precision DSP Block

CV-51001

2013.12.26