Category: Arm Cortex
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Master ARM Cortex-M4 Core Registers (Explained Simply 2026)
General-Purpose Registers These are used to store values during program execution. 🔹 Low Registers (R0–R7) 🔸 High Registers (R8–R12) ⚙️ Special-Purpose Registers 🔵 R13 – Stack Pointer (SP) 🟠 R14 – Link Register (LR) 🔴 R15 – Program Counter (PC) 🧾 Status Register ⚫ xPSR – Program Status Register Includes: 🚨 Special Control Registers These…
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Master Exception For System Level Services in Arm Cortex Processor (2026)
Exception For System Level Services in Arm Cortex Processor : When you’re working with ARM Cortex processors, especially in embedded systems, you’ll hear a lot about exceptions. But what are they, and how do they help your system run more smoothly — especially at the system level? Let’s break it down simply. Exception For System Level Services…
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Entry and Exit of Exception for ARM Cortex-M4 Processor | Master Beginner’s Guide 2026
Entry and Exit of Exception for ARM Cortex-M4 : The ARM Cortex-M4 processor is a popular microcontroller core used in embedded systems. One of its powerful features is how it handles exceptions—events that disrupt the normal flow of a program, such as interrupts, faults, or system calls. Understanding how the Cortex-M4 enters and exits exceptions…
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Master ARM Cortex-M4 Interrupt Handling (2026)
ARM Cortex-M4 Interrupt Handling : In embedded systems, handling asynchronous events like incoming data from external devices is crucial for responsive and efficient software design. One powerful mechanism used for this purpose is interrupts. Instead of continuously polling a peripheral, the microcontroller (MCU) can be configured to automatically respond to specific events, such as data…
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Master ARM Cortex-M Exception Handling (2026)
What is Exception Handling in ARM Cortex-M? ARM Cortex-M Exception Handling: In ARM Cortex-M, exceptions are interrupts and system events that cause the processor to temporarily stop the main program and execute a special function (handler) to deal with it. ✅ Cortex-M CPUs have a built-in Nested Vectored Interrupt Controller (NVIC) that supports exceptions, prioritization,…
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Understanding Stack Memory in ARM Cortex-M4
Stack Memory in ARM Cortex-M4 : Stack memory is an essential part of how microcontrollers like the ARM Cortex-M4 manage temporary data, especially during function calls and interrupt handling. If you’re just starting out in embedded systems or working with ARM processors, understanding stack memory is a must. What is Stack Memory? Stack memory is…
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Master Bus Protocols and Bus Interfaces | Beginner-Friendly Guide 2026
What is a Bus? Bus Protocols and Bus Interfaces : In embedded systems and computer architecture, a bus is a communication system that transfers data between components like the CPU, memory, and peripherals. Imagine it like a highway for data where cars (data) travel between cities (devices). What is a Bus Protocol? A bus protocol…
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Master ARM Cortex Memory Map (2026)
ARM Cortex Memory Map : This article provides an in-depth exploration of the System Address Map of the ARM Cortex-M4 processor, covering the entire 4 GB memory space from 0x00000000 to 0xFFFFFFFF. Through a clear breakdown of each memory region—including Code, SRAM, Peripheral, External RAM, External Devices, Private Peripheral Bus, and Vendor-Specific Memory—readers gain a…
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What are ARM State and Thumb State in ARM Cortex M4 Processor? | Master Beginner Friendly Guide 2026
ARM State and Thumb State in ARM Cortex M4 Processor : This tutorial provides a simple, beginner-friendly explanation of ARM state and Thumb state in ARM Cortex-M processors. You’ll learn what these two instruction sets are, why Cortex-M processors only use Thumb state, and how the T-bit (Thumb bit) plays a critical role in function…
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Understanding Thread Mode, Handler Mode, Privileged & Unprivileged Modes in ARM Cortex-M4 Processor
When working with ARM Cortex-M processors like STM32, understanding the different processor modes is crucial. These modes define how the processor executes code and manages system access. In this article, we’ll break down the four essential concepts: Whether you’re building a bare-metal embedded system or working with an RTOS, this beginner-friendly guide will help you…