EP2S130F1020I4 Datasheet, PDF (518/768 Pages) List of Unclassifed Manufacturers – Stratix II Device Handbook, Volume 1

DSP Block Overview
Figure 6–1. DSP Blocks Arranged in Columns with Adjacent LABs
DSP Block
Column
4 LAB
Rows
DSP Block
The multipliers then feed an adder or accumulator block within the DSP
block. Stratix II and Stratix II GX device multipliers support rounding
and saturation on Q1.15 input formats. The DSP block also has input
registers that can be configured to operate in a shift register chain for
efficient implementation of functions like FIR filters. The accumulator
within the DSP block can be initialized to any value and supports
rounding and saturation on Q1.15 input formats to the multiplier. A
single DSP block can be broken down to operate different configuration
modes simultaneously.
1 For more information on Q1.15 formatting, see “Saturation and
Rounding” on page 6–13.
6–2
Stratix II Device Handbook, Volume 2
Altera Corporation
January 2008