File Formats ------------ OpenFPGA widely uses XML format for interchangeable files .. _file_formats: File formats .. toctree:: :maxdepth: 2 pin_constraints_file repack_design_constraints architecture_bitstream fabric_bitstream bitstream_setting fabric_key io_mapping_file io_info_file bitstream_distribution_file bus_group_file pcf_file pin_table_file clock_network io_naming_file tile_config_file