ARM Cortex-R
| General information | |
|---|---|
| Designed by | ARM Holdings |
| Architecture and classification | |
| Microarchitecture | ARMv7-R |
The ARM Cortex-R is a family of 32-bit RISC ARM processor cores licensed by ARM Holdings. The Cortex-R is optimized for hard real-time and safety critical applications. It is one of the three different Arm Cortex profiles, the other two being the Cortex-A for applications processors, and Cortex-M for micro-controllers. The ARM Cortex-R family of microprocessors currently consists of ARM Cortex-R4, ARM Cortex-R5, ARM Cortex-R7, ARM Cortex-R8, and ARM Cortex-R52.
Overview
| Announced | |
|---|---|
| Year | Core |
| 2011 | Cortex-R4 |
| 2011 | Cortex-R5 |
| 2011 | Cortex-R7 |
| 2016 | Cortex-R8 |
| 2016 | Cortex-R52 |
The ARM Cortex-R is an ARM microprocessor architecture which is designed for high performance hard real-time and safety critical applications. It is similar to the Cortex-A profile for applications processing but adds features which make it more fault tolerant and suitable for use in hard real-time and safety critical applications.
Real time and safety critical features added include:
- Non overlapping memory regions
- Tightly coupled memory
- Increased exception handling in hardware
- Hardware division instructions
- Memory protection unit (MPU)
- Deterministic interrupt handling as well as fast non-maskable interrupts
- ECC on L1 cache and buses
- Dual-core lockstep for CPU fault tolerance
Applications
The Cortex-R is suitable for use in computer-controlled systems where very low latency and/or safety is required. An example of a hard real-time safety critical application would be a modern electronic braking system in an automobile. The system not only needs to be fast and responsive to a plethora of sensor data input, but is also responsible for human safety. A failure of such a system could lead to severe injury or loss of life.
Other examples of hard real-time and/or safety critical applications include:
- Medical device
- Programmable logic controller (PLC)
- Electronic control units (ECU) for a wide variety of applications
- Robotics
- Avionics
- Motion control
See also
External links
- Official
- Navigating the Cortex Maze
- ARM Cortex-R official website
- ARM Cortex-R4
- ARM Cortex-R5
- ARM Cortex-R7
- ARM Cortex-R8
- ARM Cortex-R52
- Other