Programmable logic device with cascading DSP slices
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United States of America Patent
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Dec 30, 2008
Grant Date -
Jun 30, 2005
app pub date -
Dec 21, 2004
filing date -
Dec 29, 2003
priority date (Note) -
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Abstract
Described is a programmable logic device (PLD) with columns of DSP slices that can be cascaded to create DSP circuits of varying size and complexity. Each DSP slice includes a plurality of operand input ports and a slice output port, all of which are programmably connected to general routing and logic resources. The operand ports receive operands for processing, and a slice output port conveys processed results. Each slice additionally includes a feedback port connected to the respective slice output port, to support accumulate functions in this embodiment, and a cascade input port connected to the output port of an upstream slice to support cascading.
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