The **M3H32FCD-R** belongs to the **M3H Group (1)** of the **TXZ+™ Family Advanced Class** microcontrollers developed by Toshiba. It is based on the ARM® Cortex®-M3 core and is designed for high-performance motor control and consumer electronics. --- ### 1. Core Technical Specifications The device is optimized for real-time control applications with the following internal architecture: | Feature | Specification | | :--- | :--- | | **CPU Core** | ARM® Cortex®-M3 | | **Max Operating Frequency** | 120 MHz | | **Flash Memory** | 256 KB | | **RAM** | 32 KB | | **Operating Voltage** | 2.7V to 5.5V | | **Package** | LQFP32 (7mm x 7mm, 0.8mm pitch) | --- ### 2. Key Electronic Components & Peripherals The "FCD-R" variant includes specific hardware blocks tailored for power efficiency and signal processing: #### A. Analog-to-Digital Converter (ADC) * **High-speed 12-bit ADC:** Capable of a 1.0 $\mu$s conversion time. * **Triggering:** Can be synchronized with timer units for precise motor phase current sensing. #### B. Motor Control Timer (A-PMD) * **Advanced Programmable Motor Control Circuit:** Supports 3-phase PWM output with dead-time insertion. * **Emergency Stop:** Built-in hardware logic to shut down PWM signals in case of overcurrent detection. #### C. Connectivity & Interface * **UART/SIO:** 2 channels for serial communication. * **I2C:** 1 channel for sensor interfacing. * **TSPI:** 1 channel for high-speed serial peripheral interface. --- ### 3. Pinout and Physical Characteristics The **LQFP32** package is compact, making it suitable for small-footprint PCB designs. * **Vcc/Vss:** Power supply pins (supports 5V systems commonly found in industrial environments). * **RESET_N:** Active-low reset pin. * **GPIO:** Multi-functional pins that can be configured for interrupt inputs or peripheral outputs. --- ### 4. Part Number Decoder Understanding the "M3H32FCD-R" suffix: | Segment | Meaning | | :--- | :--- | | **M3H** | Toshiba TXZ+ Family (M3H Group) | | **32** | Pin count (32-pin) | | **F** | Flash Memory type | | **C** | 256 KB Flash capacity | | **D** | Standard feature set / Temperature range | | **-R** | Tape and Reel packaging | --- ### 5. Common Applications Due to its 120MHz clock speed and specialized timers, this part is frequently used in: 1. **Brushless DC (BLDC) Motor Drivers:** Fans, pumps, and small appliances. 2. **Home Appliances:** Washing machines or air conditioner outdoor units. 3. **Industrial Equipment:** Small-scale automated actuators.