Editing Advanced eXtensible Interface (section)

=== AXI-Lite ===
AXI4-Lite is a [[subset]] of the AXI4 protocol, providing a [[Processor register|register-like]] structure with reduced features and complexity.<ref>{{cite web |author1=Arm Holdings |title=AMBA AXI and ACE Protocol Specification |url=https://static.docs.arm.com/ihi0022/e/IHI0022E_amba_axi_and_ace_protocol_spec.pdf |website=developer.arm.com |access-date=5 July 2019 |pages=121–128 |language=en |archive-date=5 July 2019 |archive-url=https://web.archive.org/web/20190705083043/https://static.docs.arm.com/ihi0022/e/IHI0022E_amba_axi_and_ace_protocol_spec.pdf |url-status=dead }}</ref> Notable differences are:
* all bursts are composed by 1 beat only
* all data accesses use the full data bus width, which can be either 32 or 64 bits

AXI4-Lite removes part of the AXI4 signals but follows the AXI4 specification for the remaining ones. Being a [[subset]] of AXI4, AXI4-Lite transactions are fully compatible with AXI4 devices, permitting the [[interoperability]] between AXI4-Lite initiators and AXI4 targets without additional conversion logic.<ref>{{cite web |author1=Arm Holdings |title=AMBA AXI and ACE Protocol Specification |url=https://static.docs.arm.com/ihi0022/e/IHI0022E_amba_axi_and_ace_protocol_spec.pdf |website=developer.arm.com |access-date=5 July 2019 |page=124 |language=en |archive-date=5 July 2019 |archive-url=https://web.archive.org/web/20190705083043/https://static.docs.arm.com/ihi0022/e/IHI0022E_amba_axi_and_ace_protocol_spec.pdf |url-status=dead }}</ref>

==== Signals ====

{| class="wikitable"
|-
! Write address channel !! Write data channel !! Write response channel !! Read address channel !! Read data channel
|-
| AWVALID || WVALID || BVALID || ARVALID || RVALID
|-
| AWREADY || WREADY || BREADY || ARREADY || RREADY
|-
| AWADDR || WDATA || BRESP || ARADDR || RDATA
|-
| AWPROT || WSTRB || || ARPROT || RRESP
|}
<ref>{{cite web |author1=Arm Holdings |title=AMBA AXI and ACE Protocol Specification |url=https://static.docs.arm.com/ihi0022/e/IHI0022E_amba_axi_and_ace_protocol_spec.pdf |website=developer.arm.com |access-date=5 July 2019 |page=122 |language=en |archive-date=5 July 2019 |archive-url=https://web.archive.org/web/20190705083043/https://static.docs.arm.com/ihi0022/e/IHI0022E_amba_axi_and_ace_protocol_spec.pdf |url-status=dead }}</ref>