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This page gives an overview of the ARM Architecture Reference Manuals. Read this page to help you decide which Architecture document you require. The following documents are available:
This manual describes the ARMv8-A architecture. This includes instruction set, exception model, memory model, programmers' model and the debug architecture for both the 32-bit (AArch32) and 64-bit (AArch64) execution states.
PLEASE NOTE: This is a beta release of the manual. Where there is any conflict in the AArch32 information that is common to ARMv7-A, the ARMv7-AR Architecture Reference Manual (Issue C), document ARM DDI 0406, takes precedence.
This manual describes the instruction set, memory model, and programmers' model for ARMv8 (M profile) compliant processors, including:
This manual has been written for engineers implementing ARM processors, porting operating systems, or writing development tools, who require detailed information on the ARMv8-M architecture.
This manual describes the instruction set, memory model, and programmers' model for ARMv7 (A&R profile) compliant processors, including:
It also describes the later ARMv6 architecture releases for ARM11 processors, and describes Thumb-2 and the TrustZone security extensions.
This manual describes the instruction set, memory model, and programmers' model for ARMv7 (M profile) compliant processors, including:
This manual has been written for engineers implementing ARM processors, porting operating systems, or writing development tools, who require detailed information on the ARMv7-M architecture.
This manual describes the instruction set, memory model, and programmers' model for ARMv6-M compliant processors, including:
This manual describes the instruction set, memory model, and programmers' model for ARMv4 and ARMv5 compliant processors, including:
It also describes the initial ARMv6 architecture release. It does not describe Thumb-2 or the TrustZone Security Extensions.
Refer to the ARMv7-AR Architecture Reference Manual for information on Thumb-2 and TrustZone.
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