Arm

RISC-V is an open standard instruction set architecture (ISA) based on established reduced instruction set computer (RISC) principles. Unlike most other ISA designs, RISC-V is provided under open source licenses that do not require fees to use. This gives RISC-V the potential to become a unified industry standard across academia and commercial implementations. General RISC-V…

Arm microcontrollers are extremely popular in embedded systems and IoT devices. Here are some common interview questions and answers about ARM microcontrollers: Q1. What is an ARM processor? ARM processors are RISC-based processors designed by Arm Holdings. Key features of ARM processors include: Due to these advantages, ARM processors dominate the mobile and embedded device…

The ARM7 processor is a popular 32-bit RISC CPU core widely used in embedded systems. Knowledge of ARM7 architecture and programming is valuable for engineers working on IoT, automotive, robotics, and other embedded projects. Here are some common ARM7 interview questions with example answers. What is ARM7? The ARM7 is a family of older, 32-bit…

The ARM processor architecture is widely used in embedded systems and IoT devices due to its power efficiency and performance. As ARM-based devices continue to grow in popularity, hardware and software engineers are increasingly likely to encounter ARM technologies in their work. This article provides an overview of common ARM processor interview questions and model…

The ARM fault status register is a key register in ARM processors that provides information about exceptions and faults that have occurred during program execution. This register plays a critical role in exception and fault handling on ARM-based systems. When an exception or fault occurs, the ARM processor automatically saves information about the event in…

When it comes to microcontrollers and microprocessors for embedded systems and IoT devices, two of the most popular options are ARM Cortex processors and Arduino boards. Both have their advantages and disadvantages, and the right choice depends on the specific needs of your project. The key differences between ARM Cortex and Arduino boil down to…

The ARM Cortex-M4 processor features a single-precision floating-point unit (FPU) that supports IEEE 754-2008 compliant operations. The inclusion of the FPU in the Cortex-M4 core provides significant performance improvements for applications that rely on floating-point math, such as digital signal processing, 3D graphics, and scientific computing. Cortex-M4 FPU Architecture The Cortex-M4 FPU is a coprocessor…

The Cortex-M4 processor from ARM includes an advanced interrupt controller called the Nested Vectored Interrupt Controller (NVIC). The NVIC allows assigning priorities to interrupts, which determines the order in which pending interrupts will be handled by the processor. Proper configuration of NVIC priorities is crucial for designing real-time embedded systems using Cortex-M4. What is NVIC?…

The Cortex-M4 interrupt vector table defines the location of exception and interrupt handlers in the microcontroller’s memory map. It provides a structured way to handle asynchronous events like interrupts from peripherals, faults, and exceptions in the processor. Understanding the vector table is key to configuring interrupts and exceptions properly in Cortex-M4 based systems. Overview of…

The Cortex-M7 processor from ARM introduces DSP instructions to boost digital signal processing performance. These instructions allow common DSP operations like FFTs and filters to be executed more efficiently. The key benefits of the Cortex-M7 DSP instructions are: DSP Instruction Categories The Cortex-M7 DSP instructions can be grouped into several categories: Multiplication These include single-cycle…