The **M3H26TCD-R** is a high-performance, automotive-grade microcontroller from the **TOSHIBA TXZ+™ Family Advanced Class**. It is based on the ARM® Cortex®-M3 core and is specifically designed for motor control and industrial automation applications. --- ### 1. Core Specifications The M3H group is built for efficiency and high-speed processing. | Feature | Specification | | :--- | :--- | | **Core** | ARM® Cortex®-M3 | | **Maximum Frequency** | 120 MHz | | **Operating Voltage** | 2.7V to 5.5V | | **Operating Temperature** | -40°C to +105°C | | **Package** | LQFP100 (14mm x 14mm, 0.5mm pitch) | --- ### 2. Memory Configuration The device offers robust memory options suitable for complex firmware and data logging. * **Flash Memory:** 512 KB (Program Flash) + 32 KB (Data Flash for EEPROM emulation). * **SRAM:** 66 KB (Total), including backup RAM. * **Security:** Features a hardware-based code protection mechanism to prevent unauthorized firmware readout. --- ### 3. Specialized Peripheral Modules The "M3H" series is highly regarded for its analog and timing integration, making it ideal for **Inverter and Motor Control**. #### A. Analog-to-Digital Conversion (ADC) * **Resolution:** 12-bit ADC. * **Channels:** Up to 21 channels. * **Speed:** High-speed conversion (approx. 1.0 $\mu$s). * **Triggering:** Can be synchronized with timer units for precise motor phase current sensing. #### B. Advanced Programmable Motor Control (A-PMD) This is a dedicated hardware block for generating 3-phase PWM signals. It includes: * Dead-time insertion. * Emergency stop circuitry (via the Brake input). * Synchronous execution with the ADC. #### C. Communication Interfaces The chip supports standard industrial communication protocols: * **UART:** 6 Channels. * **I2C / EI2C:** 3 Channels. * **TSPI (Serial Peripheral Interface):** 4 Channels. --- ### 4. Typical Applications Due to its high frequency and specialized motor timers, the M3H26TCD-R is commonly found in: 1. **Consumer Electronics:** Washing machines, air conditioner outdoor units (compressor control). 2. **Industrial:** General-purpose inverters, PLC (Programmable Logic Controllers). 3. **Automotive/Transportation:** Small motor actuators and cooling fans. --- ### 5. Part Number Breakdown (Nomenclature) * **M3H:** Group Name (Cortex-M3 High-speed). * **26:** Feature set/Pin count indicator. * **T:** Temperature range (Industrial/Automotive). * **C:** Flash memory size (512KB). * **D:** Package type (LQFP). * **R:** Tape and Reel packaging.