![]() The ARM microcontrollers supports for both low-level and high level programming languages. Many embedded system developers are starting to use these 32-bit microcontrollers for their projects. In the present days, the microcontroller vendors are offering 32-bit microcontrollers based on ARM cortex-m3 architecture. The ARM core operates in two states 32-bit state or THUMBS state. The SPSR and CPSR register have some properties that are defined operating modes, Interrupt enable or disable flags and ALU status flag. The SPSR and CPSR contain the status control bits which are used to store the temporary data. The reserved registers are used for specific functions.
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