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Chapter 2
Programmer's Model
This chapter describes the processor registers and provides information for programming the
microprocessor. It contains the following sections:
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ARM DDI 0301H
ID012310
About the programmer's model on page 2-2
Secure world and Non-secure world operation with TrustZone on page 2-3
Processor operating states on page 2-12
Instruction length on page 2-13
Data types on page 2-14
Memory formats on page 2-15
Addresses in a processor system on page 2-16
Operating modes on page 2-17
Registers on page 2-18
The program status registers on page 2-24
Additional instructions on page 2-30
Exceptions on page 2-36
Software considerations on page 2-59.
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