EP2S130F1020I4 Datasheet, PDF (536/768 Pages) List of Unclassifed Manufacturers – Stratix II Device Handbook, Volume 1

Architecture
Output Select Multiplexer
The outputs of the different elements of the adder/output block are
routed through an output select multiplexer. Depending on the
operational mode of the DSP block, the output multiplexer selects
whether the outputs of the DSP blocks comes from the outputs of the
multiplier block, the outputs of the adder/subtractor/accumulator, or the
output of the summation block. The output select multiplier
configuration is set automatically by software, based on the DSP block
operational mode you specify.
f
Output Registers
You can use the output registers to register the DSP block output. The
following signals can control each output register within the DSP block:
■ clock[3..0]
■ ena[3..0]
■ aclr[3..0]
The output registers can be used in any DSP block operational mode.
1 The output registers form part of the accumulator in the
multiply-accumulate mode.
Refer to the Stratix II Architecture chapter in volume 1 of the Stratix II
Device Handbook or the Stratix II GX Architecture chapter in volume 1 of
the Stratix II GX Device Handbook for more information on the DSP block
routing and interface.
6–20
Stratix II Device Handbook, Volume 2
Altera Corporation
January 2008