Current Program Status Register [CPSR]

ARM Processor Register. The CPSR holds information about the most recently performed ALU operation , controls the enabling and disabling of interrupts , and sets the processor operating mode.

Cortex-R

“ARM processor family. Targeted for hard real-time and safety-critical applications. Similar to the Cortex-A line for application processing. The R indicates the processor matches the ‘Real-time’ architecture profile.”

Cortex-A

“ARM processor family. Application processors with increased capabilities, typically able to run a full operating system such as Linux. The A indicates the processor matches the ‘Application’ architecture profile.”