Download Vector VEC139 Specifications

CHAPTER 9: TIMING CLOSURE
USING NETLIST OPTIMIZATIONS TO ACHIEVE TIMING CLOSURE
Figure 4. Netlist Optimizations
Synthesis Netlist
Optimizations
Physical Synthesis
Optimizations
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168
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Allow register retiming to trade off Tsu/Tco with Fmax: Directs the
Quartus II software to move logic across registers that are associated
with I/O pins during register retiming to trade off tCO and tSU with
fMAX. When you turn on this option, register retiming can affect
registers that feed and are fed by I/O pins. If you do not turn on this
option, register retiming does not touch any registers that are
connected to I/O pins.
INTRODUCTION TO QUARTUS II
ALTERA CORPORATION