Web Reference: The Cortex-M3 processor is a 32-bit processor, with a 32-bit wide data path, register bank and memory interface. There are 13 general-purpose registers, two stack pointers, a link register, a program counter and a number of special registers including a program status register. Access a comprehensive guide to embedded systems built around Arm Cortex-M processor cores, from a high-level hardware and software perspective to the fundamentals of microcontroller architectures and SoC-based designs. The Cortex-M0+ also received Cortex-M3 and Cortex-M4 features, which can be added as silicon options, such as the memory protection unit (MPU) and the vector table relocation.
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