Author: David Moore

The Cortex-M0 is a 32-bit ARM processor designed for microcontroller applications. It has a reduced instruction set computer (RISC) architecture and uses the ARMv6-M Thumb instruction set. The Thumb instruction set is a compact 16-bit and 32-bit instruction set designed to provide high code density without compromising performance for microcontroller applications. Some key features of

The ARM Cortex M0 watchdog timer is a hardware peripheral that can be used to automatically reset the microcontroller if the software execution goes out of control or gets stuck in an infinite loop. The watchdog timer runs independently from the main CPU and must be periodically refreshed by software to prevent it from timing

The Cortex-M4 is an advancement over the earlier Cortex-M3 microcontroller core from ARM. It builds on the strengths of the M3 design while adding several key features to improve performance, efficiency, and capabilities. Some of the most significant enhancements of the M4 compared to the M3 include: Floating Point Unit One major addition in the

Yes, the Raspberry Pi 4 does use an ARM processor. Specifically, it uses the Broadcom BCM2711B0 quad-core Cortex-A72 64-bit SoC (System on a Chip) running at 1.5GHz. This ARM-based processor gives the Raspberry Pi 4 significantly improved performance over previous Raspberry Pi models, while maintaining compatibility with existing Raspberry Pi software and applications. Overview of

The Raspberry Pi 4 is based on the ARM Cortex-A72 processor which uses the ARMv8-A 64-bit instruction set architecture. This makes the Raspberry Pi 4 an arm64 device rather than ARM. Background on ARM architectures ARM Holdings designs processor architectures and licenses them to companies like Broadcom who manufacture the actual chips. There have been

The SysTick timer is a key component in ARM Cortex-M cores that enables simple timekeeping and basic task scheduling in embedded systems. It provides a simple countdown timer and interrupt generation to support periodic task execution. The SysTick timer is intended for use as a periodic scheduler for a small real-time operating system or superloop

ARM processors provide several different timer modes that allow developers to configure timers for different use cases. The timer mode determines how the timer counts, triggers interrupts, and more. The main timer modes in ARM are: Free-Running Mode In free-running mode, the timer continuously counts up or down from an initial value at a fixed

The EK TM4C123GXL is a low-cost evaluation board based on the TM4C123GH6PM microcontroller from Texas Instruments (TI). The TM4C123GXL is part of TI’s Tiva C Series line of ARM Cortex-M4-based microcontrollers. The TM4C123GH6PM microcontroller at the core of the EK TM4C123GXL board features an 80 MHz 32-bit ARM Cortex-M4F processor with floating point unit, 256KB

The TM4C123 is a 32-bit ARM Cortex-M4 based microcontroller from Texas Instruments. It is part of the Tiva C Series TM4C12x family of microcontrollers designed for embedded applications requiring high performance and low power consumption. Overview of the TM4C123 The TM4C123 features an 80 MHz 32-bit ARM Cortex-M4 CPU with floating point unit, 256KB of

The Cortex-M4 processor from ARM includes several debug registers that allow developers to debug and trace code execution. These registers give visibility into the processor’s internal state during debugging sessions. Understanding how to properly utilize the debug registers is key to effectively debugging Cortex-M4-based systems. Overview of Cortex-M4 Debug Architecture The Cortex-M4 debug architecture is