Toshiba expands Arm Cortex-M3-based microcontrollers line up

Toshiba Electronics Europe (TEE) has announced the launch of the second M3H group in the TXZ family of low-power, high-speed microcontrollers based on the Arm Cortex-M3 core.

The first M3H Group, comprising of 30 products for consumer and industrial device applications, was launched in 2016. This second M3H group is again based on the de facto industry standard Arm Cortex-M3 core for embedded systems and offers improved levels of performance.

The M3H-devices incorporate high-performance analogue circuits and the wide range of basic functions required to support comprehensive motor control for applications in consumer and industrial devices. The line-up includes a range of 64 to 144-pin packages, 256 to 512KB of flash memory, and 32KB data flash memory.

The operating frequency is 80MHz, twice the speed of the first M3H group. Integrated features include high-precision analogue circuits such as a 12-bit ADC converter with 1.5μs conversion speed with up-to 21 channels, and an 8-bit, 2 channel, DAC.

Toshiba’s Advanced-Programmable Motor Driver (A-PMD), a single channel motor control circuit that provides inverter control of brushless DC motors is also built-in. The IC also incorporates versatile general-purpose peripheral circuitry including up to 6 UART channels, 2-4 channel I2C, 1-5 channels TSPI, and multiple channels of 16- and 32-bit timers.

These high-precision analogue and general-purpose peripheral circuits allow the second M3H group to achieve low-power operation simultaneously with high performance for high-end home appliances and large-scale systems.

In addition there is a built-in self-diagnosis function that checks the reference voltage in the ADC, a RAM parity function to detect errors during memory reads, and a single channel CRC calculation circuit that contributes to reducing software processing loads to comply with the IEC 60730 functional safety standard.

The microcontrollers require a power supply of 2.7 to 5.5V and operate from -40 to 85°C.

Toshiba plans to release groups of microcontrollers for high-speed data processing communication control and devices equipped with high-precision analogue circuits for low- to medium-speed motor control.

Neil Tyler