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Main Core

The Cortex®-M3 main core has a three-stage pipeline configuration.

Main Core
  • [Fe] Fetch stage
    Reads the instruction of the memory address indicated by the PC (Program Counter)
  • [De] Decode stage
    Decodes the instruction and determines the execution control of the execution stage
  • [Ex] Execution stage
    Executes four arithmetic operations by the Shift and ALU (Arithmetic Logic Unit), logical operations, operations such as multiplication and division, and Load and Store
    The update of the register is performed at this stage.
  • [MUL/DIV] Multiplication/Division

Chapter 2 Arm® Cortex®-M3

Hardware Configuration
NVIC (Nested Vectored Interrupt Controller)
Register Configuration
The Role of the Register
PC, LR
Stack Pointer
PUSH/POP to the Stack Pointer
Special Register
Operation Mode and Stack Pointer (1)
Operation Mode and Stack Pointer (2)
Exceptions (Reset, Interrupt, Fault, System Call)
The Role of NVIC
Tail Chain Control by NVIC
Memory Map
Memory Map for Arm® Cortex®-M3 Specifications
Memory Map of TMPM330: Example of TX03 Series
Vector Table (1)
Vector Table (2)
Bit Band Area and Bit Band Alias Area (1)
Bit Band Area and Bit Band Alias Area (2)

* Arm and Cortex are registered trademarks of Arm Limited (or its subsidiaries) in the US and/or elsewhere.

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