What is use of ARM Cortex M3?
What is use of ARM Cortex M3?
ARM Cortex M3 processor is a very well suited for highly deterministic real-time applications Microcontroller Programming in Embedded and low-cost platforms such as industrial control system, automotive body system, wireless networking and sensors and so on.
What are the features of ARM Cortex M3?
Key features of Arm® Cortex®-M3 core
- Armv7-M architecture.
- Bus interface 3x AMBA AHB-lite interface (Harvard bus architecture) AMBA ATB interface for CoreSight debug components.
- Thumb/Thumb-2 subset instruction support.
- 3-stage pipeline.
- Nested Vectored Interrupt Controller (NVIC)
What is the architecture of ARM Cortex M3?
Specifications
| Architecture | Armv7-M |
|---|---|
| ISA Support | Thumb/Thumb-2 subset |
| Pipeline | Three-stage |
| Memory Protection | Optional 8 region MPU with sub regions and background region |
| Bit Manipulation | Integrated Bit-field Processing Instructions and Bus Level Bit Banding |
What are the two modes used in ARM Cortex M3?
The processor supports two modes of operation, Thread mode and Handler mode:
- The processor enters Thread mode on Reset, or as a result of an exception return. Privileged and Unprivileged code can run in Thread mode.
- The processor enters Handler mode as a result of an exception. All code is privileged in Handler mode.
What are the advantages of Cortex-M3 processor?
The cortex M3 processor is ideally suited for low-cost micro controllers, which are commonly used in consumer products. Low power, high performance, ease-of-use are the advantages. ii) Automotive: The cortex M3 has high performance efficiency and low interrupt latency, allowing to be used in real time systems.
What is DWT in ARM?
If your ARM Cortex-M has a DWT, you can use the cycle counter to measure the cycles spent executing code. That could be used for delay loops or to measure execution time.
What are the special features of Cortex-M3 processor?
ARM Cortex-M3 system tick timer, including an external clock input option. Low power RTC with a separate power domain and dedicated oscillator. Standard JTAG test/debug interface for compatibility with existing tools. Crystal oscillator with an operating range of 1 MHz to 25 MHz.
Is ARM processor better?
ARM (generally) works better in smaller tech that does not have access to a power source at all times, while Intel focuses more on performance, which makes it the better processor for larger tech.
What is R15 register in ARM Cortex-M3?
The Program Counter (PC) is register R15. It contains the current program address. On reset, the processor loads the PC with the value of the reset vector, which is at address 0x00000004 .