The **M3H55TCD-R** belongs to the **M3H Group (1)** of the **TXZ+™ Family Advanced Class** microcontrollers developed by **Toshiba**. This series is based on the ARM® Cortex®-M3 core and is specifically designed for high-speed data processing and motor control applications. --- ### 1. Key Technical Specifications | Feature | Specification | | :--- | :--- | | **Core** | ARM® Cortex®-M3 | | **Maximum Frequency** | 120 MHz | | **Flash Memory** | 512 KB | | **RAM** | 64 KB (including 32 KB with parity) | | **Operating Voltage** | 2.7V to 5.5V | | **Operating Temperature** | -40°C to 85°C | | **Package** | LQFP100 (14mm x 14mm, 0.5mm pitch) | --- ### 2. Specialized Internal Modules The "M3H" series is known for its robust peripheral set, making it suitable for industrial automation and home appliances. #### A. Analog-to-Digital Converter (ADC) * **High Speed:** Equipped with a 12-bit ADC capable of a 1.5 $\mu s$ conversion time. * **Capacity:** Supports up to 21 channels. * **Triggering:** Can be synchronized with timer units for precise motor phase current sensing. #### B. Advanced Programmable Motor Control (A-PMD) * Provides 3-phase PWM output. * Includes built-in protection logic (emergency stop via external input). * Ideal for controlling brushless DC (BLDC) motors. #### C. Communication Interfaces The device acts as a hub for various industrial protocols: * **UART:** 8 channels. * **I2C:** 4 channels (supports Multi-master). * **TSPI (Serial Peripheral Interface):** 4 channels. --- ### 3. Application Areas Because of its high-speed Cortex-M3 core and 5V operation capability, the M3H55TCD-R is frequently found in: 1. **Consumer Electronics:** Air conditioners, washing machines, and refrigerators. 2. **Industrial Equipment:** Simple PLC units, sensor hubs, and motor drivers. 3. **Power Management:** Digital power supply controllers. --- ### 4. Part Number Breakdown (Typical Toshiba Nomenclature) * **M3H:** ARM Cortex-M3 High-performance series. * **55:** Sub-group identifier (specific peripheral set). * **T:** Temperature range / Voltage spec. * **CD:** Flash memory density (512 KB). * **R:** Package type or revision code.