Specifications

Supported Operational Modes in Cyclone V Devices
Table 3-1: Variable Precision DSP Blocks Operational Modes for Cyclone V Devices
Chainout Support
Input
Cascade
Support
(1)
Coefficient
Support
Pre-Adder
Support
Supported
Instance
Operation Mode
Variable-Precision
DSP Block Resource
NoNoNoNo3
Independent
9 x 9
multiplication
1 variable
precision DSP
block
NoYesYesYes2
Independent
18 x 18
multiplication
NoYesYesYes2
Independent
18 x 19
multiplication
YesYesYesYes1
Independent
18 x 25
multiplication
YesYesYesYes1
Independent
20 x 24
multiplication
YesYesYesYes1
Independent
27 x 27
multiplication
YesYesYesYes1
Two 18 x 19
multiplier adder
mode
YesNoNoYes1
18 x 18
multiplier adder
summed with
36-bit input
NoYesNoNo1
Complex 18 x 19
multiplication
2 variable
precision DSP
blocks
(1)
When you enable the pre-adder feature, the input cascade support is not available.
Variable Precision DSP Blocks in Cyclone V Devices
Altera Corporation
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CV-52003
Supported Operational Modes in Cyclone V Devices
3-2
2013.05.06