Arm

Instruction TCM (ITCM) is a small, fast memory region that is located within the Cortex-M processor itself. It allows frequently used code to be stored on-chip for quick access, improving performance by reducing the need to fetch instructions from slower off-chip memory. Overview of ITCM The Cortex-M series of processors from Arm are 32-bit RISC…

The data cache in Arm Cortex-M series microcontrollers is a small, fast memory that stores copies of data from the main memory. The purpose of the data cache is to reduce the number of accesses to the main memory, which is slower, and improve the performance of data retrieval operations. Overview of Caches In computer…

The instruction cache in ARM Cortex-M series microcontrollers is a small, fast memory that stores recently accessed instructions to improve performance. It sits between the CPU and the main memory, caching instructions so the CPU does not have to access slower external memory as frequently. This speeds up instruction fetches and overall execution. What is…

The stack limits in Arm Cortex-M series microcontrollers refer to the maximum stack size available for each software thread or task. The stack is a region of memory used for temporary data storage during function calls and interrupt handling. Each thread or task running on the Cortex-M CPU has its own dedicated stack space. The…

The Security Attribution Unit (SAU) is a hardware security feature introduced in Arm Cortex-M23 and newer Cortex-M processor cores. It provides memory access control and software isolation capabilities to enable secure software execution in Cortex-M based microcontrollers. Overview of SAU The SAU controls access permissions to memory regions by attributing memory regions to different security…

Bit-Band is a feature of the memory architecture in Arm Cortex-M series microcontrollers that allows individual bits within the memory to be accessed and modified atomically. It provides faster bit manipulation by treating a bit within a word in memory as if it has its own address. This avoids the need to perform read-modify-write operations…

Single-cycle I/O ports in Arm Cortex-M series microcontrollers allow data to be written to or read from the port in a single clock cycle. This makes them faster than multi-cycle I/O ports which require multiple clock cycles per access. The single-cycle ports improve performance for time-critical I/O operations. Overview of I/O Ports in Cortex-M The…

The SysTick timer is a 24-bit down counter built into the Cortex-M series of ARM processors. It provides microsecond timing capabilities and is commonly used for operating system ticks in RTOS applications. The SysTick timer runs on the processor clock and can generate periodic interrupts for timing events. Overview of SysTick Timer The SysTick timer…

The ARM Cortex series of processors are central processing units (CPUs) designed by ARM Holdings for use in a wide range of devices from smartphones to servers. They are based on the ARM instruction set and ARM microarchitecture. ARM Cortex-A Series The ARM Cortex-A series processors are designed for higher-end application processors and feature out-of-order…

The Xilinx Vitis unified software platform provides a development environment for creating embedded software applications targeting Arm Cortex-M class processors, including the Cortex-M1. However, there are some limitations when using Vitis to build applications for Cortex-M1-based systems. Limited BSP and driver support The Vitis ecosystem currently has limited board support package (BSP) and driver support…