ARM is a 32-bit reduced instruction set computing (RISC) instruction set architecture (ISA) developed in 1985. It has a large register file, uses a load/store architecture, and has uniform fixed-length instruction fields. ARM processors are known for their low power consumption compared to alternatives like Intel and focus on speed optimization through compiler usage. The ARM family includes various processor cores like Cortex-M3 and ARM7.

1. ARM CPU
Yong Heui Cho @ Mokwon University
Some of slides are referred to:
[1] ARM – Advanced RISC Machine, slideshare.

2. Basic Computer Design
6. CPU Architecture - Basic
7. CPU Architecture -
Advanced
8. ARM CPU
9. AVR CPU – ATmega328

3. History of ARM
3
• Developed in 1985 at Acorn Computers Ltd for th
e first time
• Established a new company named Advanced RIS
C Machine
• Continuation of the architecture enhancements fr
om the original architecture
□ Courtesy to ARM – Advanced RISC Machine , slideshare.

4. ARM Features
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• 32 bit architecture
• A large register file
• A load/store architecture
• Uniform and fixed length instruction field
• Simple addressing mode
• Conditional execution
□ Courtesy to ARM – Advanced RISC Machine , slideshare.

5. ARM vs. Intel
type ARM Intel
starting from RISC CISC
speed moderate important
power
consumption
important moderate
compiler important moderate

6. ARM Family
6

7. ARM Processors
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8. Cortex M3 Architecture
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9. ARM7 Architecture
9