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C HAPTER 4: P LACE AND R OUTE
O PTIMIZING THE F IT
of the device and its features. In addition to using the Chip Planner or
Assignment Editor to create assignments, you can also use Tcl commands. If
you want to specify global assignments for the project, you can use the
Settings dialog box. For more information about specifying initial design
constraints, refer to “Chapter 4: Constraint Entry” on page 51 .
Setting Options that Control Place &
Route
You can set several options that control the Fitter and may affect place and
route:
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■
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Fitter options
Fitting optimization and physical synthesis options
Individual and global logic options that affect fitting
Setting Fitter Options
The Fitter Settings page of the Settings dialog box allows you to specify
options that control timing-driven compilation and compilation speed. You
can specify whether the Fitter should try to use registers in I/O cells (rather
than registers in regular logic cells) to meet timing requirements and
assignments that relate to I/O pins. You can direct the Fitter to consider only
slow-corner timing delays when optimizing the design, or to consider
fast-corner timing delays as well as slow-corner timing delays when
optimizing the design to meet timing requirements at both corners. You can
specify whether you want the Fitter to use standard fitting, which works
hardest to meet your f MAX timing requirements, to use the fast fit feature,
which improves the compilation speed but may reduce the f MAX , or to use
the auto fit feature, which reduces Fitter effort after meeting timing
requirements and may decrease compilation time. The Fitter Settings page
also allows to you specify that you want to limit Fitter effort to only one
attempt, which may also reduce the f MAX .
Setting Physical Synthesis Optimization Options
The Quartus II software allows you to set options for performing physical
synthesis to optimize the netlist during fitting. You specify physical
synthesis optimization options in the Physical Synthesis Optimizations
page under Compilation Process Settings page in the Settings dialog box.
A LTERA C ORPORATION
I NTRODUCTION TO THE Q UARTUS II S OFTWARE
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相关PDF资料
SW-QUARTUS-SE-FLT SUBSCRIPTION FLOATALL REPL
SW006012 C COMPILER FOR DSPIC30F FAMILY
SW006013 C COMPILER MPLAB FOR DSPIC DSC
SW006015 C COMPILER MPLAB C32
SW300003-EVAL LIBRARY SOFT MODEM-EVAL ONLY
SW300010-EVAL SPEECH RECOG LIBRARY-EVAL ONLY
SW300040-EVAL LIBRARY NOISE SUPPR-EVAL ONLY
SW300060-EVAL LIBRARY ACOUSTIC ECHO-EVAL ONLY
相关代理商/技术参数
SW-QUARTUS-SE-FLT 功能描述:开发软件 FLOATING LICENSE FOR QUARTUS II RoHS:否 制造商:Atollic Inc. 产品:Compilers/Debuggers 用于:ARM7, ARM9, Cortex-A, Cortex-M, Cortex-R Processors
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SWR-10-12 制造商:Raxxess 功能描述:Wall Mount 10RU Hinged Rack with 12" Usable Depth
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