1. ARM Cortex M3 & M4 Chapter 4 - Architecture
RTLAB
Wi Daehan

2. INDEX Operation modes and states Registers Special registers
Floating point registers
Behavior of the APSR (Application program status register)
Memory system
Exceptions & Interrupts
SCB (System control block)
Reset & Reset sequence

3. Operation modes and states

4. Registers R0 – R12 R13, stack pointer (SP) R14, link register (LR)
R15, program counter (PC)

5. Special registers Program status registers MASK registers
CONTROL register

6. Special registers
Program status registers

7. Special registers
Program status registers

8. Special registers
MASK registers

9. Special registers
CONTROL register

10. Floating point registers
Single precision operation
Define floating point operation behaviors
Provide status information about operation results

11. Behavior of the APSR APSR contains status flags
Integer operations (N-Z-C-V bits)
Saturation arithmetic (Q bit)
SIMD operations (GE bits)

12. Behavior of the APSR
Integer status flags

13. Behavior of the APSR
Q status flag

14. Behavior of the APSR
GE bits

15. Memory system Memory system features 4GB linear address space
Architecturally defined memory map
Support for little endian and big endian memory systems
Write buffer
Memory Protection Unit (Optional)
Unaligned transfer support

16. Memory system
Memory map

17. Exceptions & Interrupts
Various exception sources

18. Exceptions & Interrupts

19. Exceptions & Interrupts
Nested vectored interrupt controller (NVIC)
Flexible exception and interrupt management
Nested exception/interrupt support
Vectored exception/interrupt entry
Interrupt masking

20. Exceptions & Interrupts
Vector table

21. Exceptions & Interrupts
Fault handling

22. SCB (System control block)
Merged into the NVIC
Controlling processor configurations (e.g., low power modes)
Providing fault status information (fault status registers)
Vector table relocation (VTOR)

23. Reset & Reset sequence
Power on reset - reset everything in the microcontroller.
System reset - reset just the processor and peripherals.
Processor reset - reset the processor only.

24. Reset & Reset sequence

25. Reset & Reset sequence