CLP Report Level Shifter Checks

A few cases when the simulator flags an error are listed below:

• A level shifter cell is required for a crossing, but it is neither present in the design nor specified in the UPF file.
• A level shifter cell is not required for a crossing, but it is either present in the design or specified in the UPF file.
• A level shifter cell is present in the design, but the corresponding strategy is not defined in the UPF file.
• A level shifter strategy is specified in the UPF file, but a level shifter cell is not present in the design.
• The direction of the level shifter cell specified in the UPF file is not correct. For example, instead of a high-to-low level shifter cell, a low-to-high level shifter cell is specified.
• The location of the level shifter cell does not match with the location specified in the UPF file.