6.1.3.1 Slave Arbitration

Each of the slave devices on the AHB bus matrix contains an arbiter. Arbitration is done at two levels. At the first level, the fixed higher priority masters are evaluated for any access request to the slave. At the second level, the remaining buses are evaluated in round robin fashion for any access request to the slave. The priority levels of the buses with fixed priority are listed in the following table. 

Table 6-2. Fixed Priority Masters
MastersPriorityArbitration
M3 DCode busMM01Fixed
M3 ICode busMM12Fixed
M3 system busMM23Fixed
System controllerMM94Fixed

The buses with round robin priority are listed in the following table.

Table 6-3. WRR Masters
MastersPriorityArbitration
HPDMAMM34WRR
FIC_0MM44WRR
FIC_1MM54WRR
MACMM64WRR
PDMAMM74WRR
USBMM84WRR