The Priority_Ctrl_Reg defines the order in which inputs are selected. Each 3-bit field is a priority for each particular slave interface. For example:

The values represent the priority value for each port number. If you want to give the highest priority to a particular slave port, program the corresponding port with the lowest value. Typically, this is likely to be a port that has more important data or that has a small FIFO and is therefore likely to overflow. If you want to give lowest priority to a particular slave port, program the corresponding slave port with the highest value. The arbitration logic selects the slave with the lowest port number when the same priority value is entered for multiple slaves.

Priority values must not be changed while the corresponding slave port is enabled. Before changing the priority level for one or more slave ports, disable those slave ports using the Funnel Control Register.

This register is available in all configurations.

The number of fields implemented in this register depends on the configuration of the component.

See the register summary in Table 3.33.