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Toshiba Electronic Devices & Storage Corporation has moved its TXZ+ Family Entry-Class M4L Group microcontrollers into mass production, targeting single-motor control applications in home appliances, consumer products and industrial equipment.
The M4L Group is built around an Arm Cortex-M4 core with a floating-point unit (FPU) and integrates dedicated motor-control hardware, security functions and functional safety measures on a single chip. The microcontrollers are designed to offload motor-control processing from the CPU to dedicated hardware, reducing processor load while maintaining precise motor control.
Dedicated Motor-Control Hardware
The M4L Group integrates three dedicated motor-control circuits. The Advanced Vector Engine 2 (A-VE2) performs vector control calculations in hardware, the Advanced Programmable Motor Control Circuit 2 (A-PMD2) handles PWM output and motor drive operation, and the Advanced Encoder Input Circuit 2 (A-ENC2) detects encoder signals to obtain rotational position and speed.
By handling these functions in hardware rather than software, the microcontrollers free up CPU capacity for other tasks within the application.
Core Specifications
The microcontrollers operate at frequencies up to 80MHz and support a supply voltage range of 2.7V to 5.5V, providing compatibility with existing 3V and 5V system designs. They are available in four small package types with 44 to 64 pins across LQFP and VQFN form factors, with two memory configurations to choose from.
An internal high-speed oscillator with plus or minus 1 per cent accuracy (across a supply voltage range of 2.7V to 5.5V and temperatures from minus 40 to 105 degrees Celsius) and an integrated overcurrent detection comparator for emergency motor shutdown reduce the need for external components and help minimise board area. A low-power STOP2 mode is included for battery-powered applications.
Memory And Firmware Updates
The 256KB code flash variants use a dual-bank flash architecture with two 128KB blocks. This allows one program to execute while the other block is being rewritten, enabling firmware updates without stopping system operation and supporting over-the-air update implementations.
The 128KB code flash variants incorporate 64KB of data flash memory, intended for storage of log data and configuration information. Both configurations include 32KB of RAM with parity and 4KB of VE RAM. The flash memory supports up to 100,000 program and erase cycles.
Security And Functional Safety
Three security functions are integrated across the M4L Group. Chip protection (CPRO) helps prevent unauthorised access, secure access memory (SAM) controls memory access and non-rewritable flash protection (NRFP) guards critical memory areas. The combination is aimed at improving system reliability in applications including IoT devices.
On the functional safety side, the microcontrollers include self-diagnosis functions covering flash memory, RAM, analogue-to-digital converters and clock systems. Toshiba is also providing certified software compliant with UL 60730 Class B, a functional safety standard for household appliances, to help customers with their certification processes.
Communications Interfaces
The M4L Group integrates several general-purpose communications interfaces. These include up to six channels of UART, up to three channels of SPI (TSPI), up to two channels of I2C and a serial memory interface (SMIF) for external memory connectivity. Channel counts vary across the four package sizes.
Analogue functions include a 12-bit analogue-to-digital converter with up to 14 inputs across two units, a two-channel 8-bit digital-to-analogue converter and a six-channel comparator.
Target Applications And Development Support
Toshiba is targeting the M4L Group at smart home appliances and consumer devices with IoT functionality, industrial equipment and factory automation systems, and office and commercial equipment.
Development support includes product documentation, sample software and driver software for peripheral control. Toshiba has indicated it will roll out evaluation boards and development environments in collaboration with Arm ecosystem partners.
The company has flagged plans to expand its lineup of motor-control-optimised microcontrollers and strengthen development support over time.
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Further product details are available on the Toshiba Electronic Devices & Storage Corporation website.
Last Updated on July 30, 2026 by Nick Ross
