ARM r1p3, R4, R4F 2.1 About the programmers model

Programmer’s Model

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2.1 About the programmer’s model

The processor implements the ARMv7-R architecture that provides:

• the 32-bit ARM instruction set

• the extended Thumb instruction set introduced in ARMv6T2, that uses Thumb-2

technology to provide a wide range of 32-bit instructions.

For more information on the ARM and Thumb instruction sets, see the ARM Architecture

Reference Manual. This chapter describes some of the main features of the architecture but, for

a complete description, see the ARM Architecture Reference Manual.

This chapter also makes reference to older versions of the ARM architecture that the processor

does not implement. These references are included to contrast the behavior of the Cortex-R4

processor with other processors you might have used that implement an older version of the

architecture.