EP2SGX130GF1508C4 Datasheet, PDF (89/316 Pages) Altera Corporation – Section I. Stratix II GX Device Data Sheet

Digital Signal
Processing
(DSP) Block
Stratix II GX Architecture
The most commonly used DSP functions are finite impulse response (FIR)
filters, complex FIR filters, infinite impulse response (IIR) filters, fast
Fourier transform (FFT) functions, direct cosine transform (DCT)
functions, and correlators. All of these use the multiplier as the
fundamental building block. Additionally, some applications need
specialized operations such as multiply-add and multiply-accumulate
operations. Stratix II GX devices provide DSP blocks to meet the
arithmetic requirements of these functions.
Each Stratix II GX device has two to four columns of DSP blocks to
efficiently implement DSP functions faster than ALM-based
implementations. Stratix II GX devices have up to 24 DSP blocks per
column (see Table 2–21). Each DSP block can be configured to support up
to:
■ Eight 9 × 9-bit multipliers
■ Four 18 × 18-bit multipliers
■ One 36 × 36-bit multiplier
As indicated, the Stratix II GX DSP block can support one 36 × 36-bit
multiplier in a single DSP block, and is true for any combination of
signed, unsigned, or mixed sign multiplications.
Altera Corporation
October 2007
2–81
Stratix II GX Device Handbook, Volume 1