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The Definitive Guide to the ARM Cortex-M3, 2nd Edition by Joseph Yiu

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CHAPTER 5

Memory Systems

Publisher Summary

Since the Cortex™-M3 processor has different memory architecture from that of traditional ARM processors, the different features of its memory systems are explained in this chapter. The memory map shows what is included in each memory region. Aside from decoding which memory block or device is accessed, the memory map also defines the memory attributes of the access. The different memory attributes and its regions are described here. Access permissions for default memory are also discussed. Bit-band operations allow a single/store operation to access a single data bit. The chapter also provides details about unaligned transfers and what it looks like. The Cortex-M3 has no SWP instruction (swap), which ...

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