Table A9-7 Encoding for AWIDM[4:0]
Attribute Value Issuing capability per ID Comments
Write ID
0b000nn
1 Core nn system domain store exclusive
0b001xx
0 Unused
0b010xx
0 Unused
0b011nn
15 Core nn non-re-orderable device write
0b1xxxx
1 Write to normal memory, or re-orderable device memory
In the following table, nn is the core number 0b00, 0b01, 0b10, or 0b11.
Table A9-8 Encoding for ARIDM[5:0]
Attribute Value Issuing capability per ID Comments
Read ID
0b0000nn
4 Core nn exclusive read or non-reorderable device read
0b0001xx
0 Unused
0b001000
0 Unused
0b001001
1 DVM complete
0b00101x
0 Unused
0b0011xx
0 Unused
0b01xx00
1 ACP read
0b01xx01
0 Unused
0b01xx1x
0 Unused
0b1xxxnn
1 Core nn read
These ID and transaction details are provided for information only. Arm strongly recommends that all
interconnects and peripherals are designed to support any type and number of transactions on any ID, to
ensure compatibility with future products.
Related information
Arm® AMBA® AXI and ACE Protocol Specification AXI3, AXI4, and AXI4-Lite, ACE and ACE-Lite
A9 ACE Master Interface
A9.5 Attributes of the ACE master interface
100236_0100_00_en Copyright © 2015–2017, 2019 Arm Limited or its affiliates. All rights
reserved.
A9-121
Non-Confidential
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