.. _file_formats_unique_blocks: Unique Blocks (.xml) ~~~~~~~~~~~~~~~~~ A unique blocks file is formatted in XML. The unique blocks can be of type ``cbx``, ``cby`` or ``sb``. As illustrated by the XML code below, the file includes the type and coordinates of these unique blocks, as well as the coordinates of their corresponding instances. Configurable Block ^^^^^^^^^^^^^^^^^^^ Unique blocks can be applied to various blocks, each of which can be of type ``cbx``, ``cby`` or ``sb``, and may have different coordinates. .. option:: For each block, a set of keys can be defined. For unique blocks, both keys and instances can be specified. However, if a unique block does not have an instance, only keys are permitted. - ``type`` specifies the type of the unique block in the FPGA fabric. Valid values for ``type`` are ``cbx``, ``cby`` or ``sb``. - ``x`` represents the x-coordinate of the unique block. - ``y`` represents the y-coordinate of the unique block. Configurable Instance ^^^^^^^^^^^^^^^^^^^ A specific unique block can have multiple instances, where each instance is a mirrored version of the unique block. Each instance shares the same type as its parent block and includes information about its coordinates. .. option:: - ``x`` specifies the x-coordinate of the instance. - ``y`` specifies the y-coordinate of the instance. The following content provides an example of a unique block file: .. code-block:: xml