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04 ARM Architecture Overview - Electrical Engineering and ...

1 Confidential11 ARM Architecture Overview222 Development of the ARM Architecture4 TARM7 TDMIARM922 TThumb instruction setARM926EJ-SARM946E-SARM966E-SImproved ARM/Thumb InterworkingDSP instructionsExtensions:Jazelle (5 TEJ)5TE6 ARM1136JF-SARM1176 JZF-SARM11 MPCoreSIMD InstructionsUnaligned data supportExtensions:Thumb-2 (6T2)TrustZone (6Z)Multicore (6K)7 Note: Implementations of the same Architecture can be very different ARM7 TDMI - Architecture v4T. Von Neuman core with 3 stage pipeline ARM920T - Architecture v4T. Harvard core with 5 stage pipeline and MMUC ortex-A8/R4/M3/M1 Thumb-2 Extensions:v7A (applications) NEONv7R (real time) HW DivideV7M (microcontroller) HW Divide and Thumb-2 only Processor Architecture = Instruction Set + Programmer s model2 Confidential333 ARM Architecture profiles Application profile (ARMv7-A Cort)

cpsr r13 (sp) r14 (lr) User mode spsr r13 (sp) r14 (lr) IRQ FIQ r8 r9 r10 r11 r12 r13 (sp) r14 (lr) spsr spsr r13 (sp) r14 (lr) Undef spsr r13 (sp) r14 (lr) Abort spsr r13 (sp) r14 (lr) SVC Current mode Banked out registers ARM has 37 registers, all 32 -bits long A subset of these registers is accessible in each mode 8 Program Status Registers ...

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