Altera Quartus II Scripting - Manual (Page 64)

2–38 Chapter 2: Command-line Executables
quartus_fit
Quartus II Scripting Reference Manual © July 2013 Altera Corporation
This option overrides the settings specified in the Quartus II Settings File (.qsf) or the part used in Analysis
& Synthesis (quartus_map). The specified part must be in the same device family used in Analysis &
Synthesis.
--seed=<value>
Option to use the specified seed value.
The Fitter uses the seed as the initial placement configuration when attempting to optimize the design's
timing requirements, including fmax.
--signalprobe
Option to perform an incremental SignalProbe ™ compilation. Use this option when only SignalProbe
settings have changed since the last compilation.
This option cannot be used with most of the other quartus_fit options.
--tco=<time unit>
Option to specify the tco time value.
Tco is the maximum acceptable clock to output delay to the output pin. The clock to output delay is the
time required to obtain a valid output at an output pin that is fed by a register after a clock signal
transition on an input pin that clocks the register. This time always represents an external pin-to-pin delay.
Example usage:
quartus_fit one_wire --tco=10.55ns
The format is "<floating point time value><time unit>". In the example, "10.55" is the <floating point time
value> and "ns" is the <time unit>.
The following table displays possible time units:
--tdc[=on|off]
Option to use timing-driven compilation. This option optimizes place and route based on timing
information.
Time Unit Description
s second(s)
ms millisecond(s)
us microsecond(s)
ns nanosecond(s)
ps picosecond(s)
fs femtosecond(s)
hz hertz
khz kilohertz
mhz megahertz
ghz gigahertz