The routing parameters shown in This Figure set up the decoding used by the switch to route slave interface transfers to master interfaces based on the TDEST signal. Each master interface must have a BASE / HIGH range that is within the valid width of the TDEST width specified previously. The BASE / HIGH pair must not overlap master interfaces. When a transfer is received at the slave interface, the TDEST is decoded based on this table. A request is then sent to arbiter for the master interface corresponding to the TDEST . If the slave interface is chosen by the arbiter, the transfer proceeds to the master interface. This tab is only available when Use control register routing is set to No .