$VAR1 = {
          'REFCLK_BUF3' => [
                             'AsyncOutNoTimingArc'
                           ],
          'C_WREN' => [
                        'C_CLK_and_SCANCLK_L__IN'
                      ],
          'CAL_CLK' => [
                         'AsyncInNoTimingArc'
                       ],
          'RX_IBIAS_2_25U[4:0]' => [
                                     'Power'
                                   ],