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The internal arbiter arbitrates between competing slave interfaces for access to the debug APB.
When a slave interface raises a request, the arbiter gives the highest priority to the slave interface with the lowest instance suffix. For example, Slave Interface 0 > Slave Interface 1 > Slave Interface 2 > Slave Interface 3. The order in which the slave interfaces raised their requests relative to each other is not used in arbitration.
The arbitration is re-evaluated after every access.