# System Architecture

The "Detailed Block Diagram of the RSL15 System" figure shows a detailed block diagram of the RSL15 system.

Figure: Detailed Block Diagram of the RSL15 System

RSL15 is based around four key components:

1. The Arm Cortex-M33 processor: A 32-bit core for real-time applications, specifically developed to enable high-performance low-cost platforms for a broad range of low-power applications. This processor is tightly integrated with the TrustZone Armv8-M security extensions, and is used to provide secure general-purpose processing and control of the RSL15 system’s components, including the RF front-end and Bluetooth baseband.
2. TrustZone® Arm CryptoCell™-312: Provides a comprehensive security solution, with features protecting the authenticity, integrity and confidentiality of code and data, along with cryptographic hardware services, TRNG, and lifecycle state management.
3. Radio Frequency Front-End: Based on a 2.4 GHz RF transceiver, the radio frequency front-end (RFFE) implements the physical layer of the Bluetooth Low Energy technology standard, and can be used to implement the RF layer of other standard and custom protocols.
4. Bluetooth Protocol Baseband Hardware: Bluetooth low energy technology compliant, including support for all mandatory and optional features of the Bluetooth core 5.2 technology release, and compliance with the Blutetooth 5.2 core specification.