Author: System on Chips

Understanding the FCLK to TCK Clock Domain Crossing in Cortex-M3 In the ARM Cortex-M3 processor, clock domain crossings (CDCs) are critical design considerations, especially when dealing with the Free Running Clock (FCLK) and the Test Clock (TCK). FCLK is typically used for the processor’s main operation, while TCK is associated with debug and test functionalities….

ARM Cortex-A72 Program Counter Misalignment Leading to SIGBUS The issue at hand involves a misaligned Program Counter (PC) register observed in a core file generated after a SIGBUS (Bus error) signal was received during the execution of a program on an ARM Cortex-A72 processor. The PC register, which should always point to a 4-byte aligned…

MTB Buffer Full Behavior and Debug State Challenges in Cortex-M33 The Cortex-M33 Micro Trace Buffer (MTB) is a powerful feature designed to capture non-sequential program execution branches, providing valuable insights into program flow for debugging and performance analysis. The MTB writes trace data directly to a designated SRAM buffer, but when this buffer fills up,…

ARM Cortex-A, Cortex-R, and Cortex-M Profiles: Architectural Overview and Design Philosophies The ARM architecture is divided into several profiles, each tailored for specific use cases and performance requirements. The Cortex-A, Cortex-R, and Cortex-M profiles represent distinct families of processors designed to address different segments of the embedded systems market. Understanding the architectural differences and design…

ARM Cortex-M4 Unexpected Reset with PC = 0x00000000 and HFSR = 0x40000000 The issue at hand involves an unexpected reset occurring during the normal operation of a system based on the ARM Cortex-M4F processor, specifically the Tiva TM4C129XNCZAD microcontroller. The reset is accompanied by a register dump that reveals critical information about the state of…

ARM TrustZone’s Limited Resistance to Physical Attacks ARM TrustZone is a hardware-based security feature integrated into ARM processors, designed to create a secure environment for executing trusted applications and protecting sensitive data. TrustZone achieves this by partitioning the system into two worlds: the Secure World and the Normal World. The Secure World is isolated from…

ARM Cortex-Based Development Boards with MIPI CSI-2 Camera Interfaces The integration of MIPI CSI-2 (Camera Serial Interface 2) into ARM-based development boards is a critical requirement for projects involving computer vision, automotive camera systems, and embedded imaging applications. MIPI CSI-2 is a high-speed serial interface designed to connect cameras to processors, offering low power consumption,…

ARM Cortex-M0/M3 Register File Structure and Selection Mechanism The ARM Cortex-M0 and Cortex-M3 processors are widely used in embedded systems due to their efficiency, low power consumption, and robust performance. A critical component of these processors is the register file, which plays a pivotal role in data manipulation and instruction execution. The register file in…

ARM Cortex-A Platform Requirements for Android Automotive 12 When developing In-Vehicle Infotainment (IVI) applications for Android Automotive 12, selecting the right ARM Cortex-A based single-board computer (SBC) is critical. Android Automotive 12, being a resource-intensive operating system, demands specific hardware capabilities to ensure smooth performance and compatibility. The ARM Cortex-A family of processors, known for…

ARM Cortex-A53 PMU_CCNTR Cycle Count Halt Issue During DEMCR->TRCENA Configuration The ARM Cortex-A53 processor is a widely used 64-bit core in embedded systems, known for its balance of performance and power efficiency. One of its key features is the Performance Monitoring Unit (PMU), which allows developers to measure various performance metrics, including CPU cycle counts….