Logic Lock supported environments

Below are the environments where Logic Lock can be used.

Table 1. Logic Lock supported environments

Application examples where Logic Lock is effective

Logic Lock can be applied at various points in the design flow to help improve design productivity. for example,

• I want to arrange the cells of a certain subordinate entity to some extent rather than interspersing them.
• You want to decide the placement area for each entity you are in charge of, and reduce the placement conflicts when the entity is finally integrated.

At times like this, you get great benefits.

What is a Logic Lock region?

Create Logic Lock regions for the entities whose placement you want to control to control the layout of your design.

Due to the physical framework, even if there is a design or layout change in the surrounding entities, the placement of the entities specified in the Logic Lock region will not go out of the framework = will not be affected.

Reserved Logic Lock Region

Only entities and nodes assigned to the specified Logic Lock region can be placed, preventing resources from other entities from being placed together.

Parent Region/Child Region (Standard Edition only)

Logic Lock regions can have parent-child relationships (so-called “nesting”). Moving a parent region automatically moves the associated child regions. Child regions can be defined as floating or fixed within the parent region.

Merging Regions

You can merge multiple regions to specify a rectangular area.

Customizing Region Shapes

Areas can be added or deleted from the created region shape, and the original rectangular area can be specified. (Pro Edition only)

Using this function, it is possible to specify a non-contiguous area as a region.

In the Standard Edition, the Add/Subtract Logic Lock Region function cannot be used, but by setting multiple non-adjacent non-contiguous regions into one region using the Merge Logic Lock Region function, the non-contiguous regions can be defined.

Create a Logic Lock region

Create a Logic Lock region to set Logic Lock for subordinate entities in the Quartus Prime project. Since you are framing and arranging regions for the sub-entities of your design, you must know how many logic resources your entities require. Therefore, let's execute and complete the process above Analysis & Synthesis in advance.

1. Bring up the Logic Lock Regions Window (Assignments menu) for creating regions.

2. Right-click the entity you want to specify Logic Lock from the Project Navigator window > Logic Lock Region > Create New Logic Lock Region

Choose.

Make sure the specified entity is registered in the LogicLock Regions Window and marked in the Project Navigator window.

3. Launch Tools menu > Chip Planner.
From here on, use the Logic Lock Regions Window on the Chip Planner to make placement-aware settings.

If the Chip Planner does not show the Logic Lock Regions Window,

Select View menu > Logic Lock Regions Window on the Chip Planner.

4. Make various settings for the region.

Table 2. Logic Lock Region Attributes

run the compile

After setting the region, run compilation. (Apply incremental compilation if necessary.)

Processing menu > Start Compilation

Check the compilation result

After compilation is complete, check the compilation report and Timing Analyzer to confirm that the timing requirements have been met, and the ChipPlanner to check the placement status.

At the end

How was it?
If you want to constrain resource placement on an entity-by-entity basis, make good use of Logic Lock.