The **M3H38TBD-R** is a specific part number belonging to the **M3H Group** of microcontrollers developed by **Toshiba**. This series is part of the **TXZ+™ Family Advanced Class**, based on the ARM® Cortex®-M3 core. Below is a detailed breakdown of its electronic specifications and characteristics. --- ### 1. Core Architecture The device is designed for high-efficiency control, specifically targeting motor control and consumer electronics. | Feature | Specification | | :--- | :--- | | **Core** | ARM® Cortex®-M3 | | **Max Operating Frequency** | 120 MHz | | **Operating Voltage** | 2.7V to 5.5V (Single supply) | | **Instruction Cache** | 16 KB | --- ### 2. Memory Configuration The "38" in the part number typically denotes the memory density within the series logic. * **Code Flash:** 512 KB (with 100,000 write cycle endurance). * **Data Flash:** 32 KB (dedicated for parameter storage). * **RAM:** 66 KB (Total), providing ample space for stack and variable operations. --- ### 3. Key Peripheral Modules The M3H series is characterized by its robust analog-to-digital conversion and motor control hardware. #### A. Analog Components * **ADC:** 12-bit Analog-to-Digital Converter (approx. 21 channels). * **DAC:** 8-bit Digital-to-Analog Converter (2 channels). #### B. Timer and Control * **A-PMD (Advanced Programmable Motor Control):** Hardware specifically designed to handle 3-phase PWM output for brushless DC (BLDC) motors. * **A-ENC (Advanced Encoder Input Circuit):** Supports incremental encoder signals for precise motor positioning. * **T32A:** 32-bit timer event counter. #### C. Communication Interfaces | Interface Type | Channels | | :--- | :--- | | **UART/SIO** | Up to 6 Channels | | **I2C** | 3 Channels | | **TSPI (Serial Peripheral Interface)** | 3 Channels | --- ### 4. Physical and Environmental The suffix **-R** usually indicates the packaging style (often referring to Tape & Reel) or a specific revision. * **Package Type:** LQFP100 (14mm x 14mm, 0.5mm pitch). * **Operating Temperature:** -40°C to +85°C. * **Low Power Features:** Includes IDLE, STOP1, and STOP2 modes to reduce current consumption in battery-operated or energy-efficient devices. --- ### 5. Common Applications Due to the inclusion of the ARM Cortex-M3 core and specialized motor control timers, this part is frequently found in: 1. **Home Appliances:** Washing machines, air conditioners, and refrigerators (Inverter control). 2. **Industrial Equipment:** Small-to-medium scale factory automation and motor drives. 3. **Office Automation:** Printers and multifunction devices requiring precise motion control. ---