9.7.6. Memory attributes

The AXI peripheral port uses the ARCACHEPm and AWCACHEPm signals to indicate the memory attributes of the transfer, as returned by the MPU. Table 9.45 shows the encoding used for the ARCACHEPm and AWCACHEPm signals of the master interface. These are generated from the memory type and outer region attributes.

Table 9.45. ARCACHEPm and AWCACHEPm encodings

Encoding[a]Meaning
b0000Strongly Ordered
b0001Device
b0011Non-cacheable
b0110Cacheable, write-through, allocate on reads only
b0111Cacheable, write-back, allocate on reads only
b1111Cacheable write-back, allocate on reads and writes

[a] All encodings not shown in the table are reserved.


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