Entering Resource, Device & Global Logic Synthesis Assignments

The MAX+PLUS^® II software allows you to enter a variety of resource, device, and global logic synthesis assignments for your projects. Resource assignments are used to assign logic functions to a particular pin, logic cell, I/O cell, embedded cell, row, column, Logic Array Block (LAB), Embedded Array Block (EAB), chip, clique, local routing, logic option, timing requirement, or connected pin group. With MAX+PLUS II software, you can enter all types of resource, device, and global logic synthesis assignments with Assign menu commands. You can also enter pin, logic cell, I/O cell, embedded cell, LAB, EAB, row, and column assignments in the MAX+PLUS II Floorplan Editor. The Assign menu commands and the Floorplan Editor all save assignment information in the ASCII Assignment & Configuration File (.acf) for the project.

In the Synopsys FPGA Express software, you can assign a limited subset of these assignments in the Create Implementation dialog box, in the Options dialog box, and by specifying options in constraint tables. These attributes are incorporated into the ACF generated by the FPGA Express software. Refer to the following topics for more information:

• Assigning a Device & Clock Frequency (f_MAX)
• Assigning Pins, Logic Options, and t_SU, t_CO & t_PD Timing Constraints
• Specifying the MAX+PLUS II Logic Synthesis Style with FPGA Express Software
• Using ACFs Generated by FPGA Express Software
• Modifying the Assignment & Configuration File with the setacf utility

Related Links:

• Go to the following sources for related information:
  • FPGA Express Help
  • "resource assignments" or "ACF, format" in MAX+PLUS II Help
  • Specifying the Speed/Area & CPU Effort Settings with the FPGA Express Software in these MAX+PLUS II ACCESS^SM Key topics

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