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ARM Architecture and Pipeline Organization

ARM Architecture and Pipeline Organization

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ARM Architecture and Pipeline Organization

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  1. ARM Architecture and Pipeline Organization

  2. ARM7 ARM7 is a group of older 32-bit ARM processor cores licensed by ARM Holdings

  3. ARM Architecture

  4. ARM Architecture (Cont…) • Enhancements in the ARM7 architecture • Each instruction controls the ALU and shifter • Auto-increment and auto-decrement addressing modes • Multiple Load/Store • Conditional execution

  5. ARM Architecture (Cont…) • Results • High performance • Low code size • Low power consumption • Low silicon area

  6. Pipeline Organization • Increases speed because most instructions are executed in single cycle. • Versions: • 3-stage (ARM7TDMI and earlier) • 5-stage (ARMS, ARM9TDMI) • 6-stage (ARM10TDMI)

  7. Pipeline Organization (Cont…) • 3-stage pipeline: Fetch – Decode - Execute • Three-cycle latency, one instruction per cycle throughput

  8. Pipeline Organization (Cont…)

  9. Pipeline Organization (Cont…) • 6-stage (ARM10TDMI) of ARM7 comprises of following stages • Fetch • Issue • Decode • Execute • Memory • Write

  10. Pipeline Organization (Cont…)

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