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The three device attributes are G, R, and E, with the following definitions:Gathering (G/nG)- Determines whether multiple accesses can be merged into a single bus transaction- nG: Number/size of accesses on the bus = number/size of accesses in codeReordering (R/nR)- Determines whether accesses to the same device can be reordered- nR: Accesses to the same IMPLEMENTATION DEFINED block size will appear on the bus in program orderEarly Write Acknowledgement (E/nE)- Indicates to the memory system whether a buffer can send acknowledgements- nE: The response should come from the end slave, not buffering in the interconnectSo with the above said:Device-nGRE is device memory where Reordering and Early Write Acknowledgements are allowed, but multiple accesses cannot be merged into a single bus transactionDevice-nGnRE is device memory where Early Write Acknowledgements are allowed, but multiple accesses cannot be merged into a single bus transaction, and accesses to the same IMPLEMENTATION DEFINED block size will appear on the bus in program order

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