If set to Current Settings (0), the crossbar is configured according to the parameter settings in the other configuration pages.
If set to Minimize Area (1), the crossbar is configured in SASD (Shared-Access) mode.
If set to Maximize Performance (2), the crossbar is configured in SAMD (Crossbar) mode and all acceptance and issuing thresholds are increased to allow multiple outstanding transactions for each connected master and slave.