The **STR9-RVDK/BAS** is a comprehensive hardware evaluation and development kit designed for the STMicroelectronics **STR91x series** of microcontrollers, which are based on the ARM966E-S core. Below is a breakdown of the electronic components, hardware features, and specifications typically found in this basic (BAS) version of the RealView Development Kit (RVDK). --- ## 1. Core Microcontroller (MCU) The heart of the board is the **STR912FAW44** (or a similar variant in the STR9 family). | Feature | Specification | | :--- | :--- | | **Core** | ARM966E-S | | **Clock Speed** | Up to 96 MHz | | **Flash Memory** | 512 KB + 32 KB (Secondary flash for EEPROM emulation) | | **SRAM** | 96 KB | | **Architecture** | Harvard architecture with Tightly Coupled Memory (TCM) | --- ## 2. Communication Interfaces The board is equipped with several physical transceivers and connectors to test industrial communication protocols: * **Ethernet:** Includes a 10/100 Mbps Physical Layer (PHY) chip and an RJ45 jack for networking. * **USB:** A USB 2.0 Full Speed (12 Mbps) device port. * **CAN Bus:** Integrated CAN 2.0B controller with an on-board transceiver and DB9 connector. * **UART:** Usually features two RS-232 serial ports for debugging and data logging. --- ## 3. Peripheral Hardware Components The development board includes various electronic components to facilitate user interaction and hardware testing: ### User Interface * **LCD Display:** Often includes a 2x16 character or small graphic display. * **Input Buttons:** Reset button, Wake-up button, and user-programmable push buttons. * **LEDs:** A set of 4 to 8 LEDs mapped to GPIO pins for status indication. * **Potentiometer:** Connected to an Analog-to-Digital Converter (ADC) channel for testing voltage inputs. ### Memory & Storage * **External Flash/SRAM:** Connectors or footprints for expanding memory via the External Memory Interface (EMI). --- ## 4. Debugging and Power | Component | Description | | :--- | :--- | | **JTAG/EICE** | Standard 20-pin ARM JTAG interface for real-time debugging and programming. | | **Power Supply** | Can be powered via USB or an external 5V-12V DC power jack. | | **Voltage Regulators** | On-board LDOs to step down power to 3.3V (I/O) and 1.8V (Core). | --- ## 5. Development Tools (RVDK) The "RVDK" suffix indicates that this kit was bundled with **ARM RealView** tools. * **Compiler:** ARM C/C++ Compiler. * **Debugger:** RealView Debugger supporting the ULINK or J-Link probes. * **Libraries:** Includes the STR91x Standard Peripheral Library for handling GPIO, Timers, and DMA. ---