Renesas Electronics RA6T2 Group MCUs

Renesas Electronics has introduced the RA6T2 Group MCUs, featuring a rich set of peripheral functions and hardware accelerator designed specifically for motor control. The MCUs are suitable for motor control designs in home appliances, smart homes, and industrial and building automation, as well as inverter control.

Based on the 240 MHz Arm Cortex-M33 core, the 32-bit MCUs feature peripherals optimised for high performance and precision motor control in order to reduce bill of materials (BOM) cost while boosting performance. For example, two independent ADC units offer high-speed conversion with a maximum speed of 0.16 µs and include a simultaneous sample and hold function for three channels to detect the three-phase current of a motor. Amplifiers that can set the gain according to the input voltage range are built in and analog components that were previously external are incorporated, including comparators which detect abnormal voltage input and overcurrent.

The adjustable PWM timer makes it easy to port existing algorithms. It also provides, in cooperation with other analog functions, a PWM output cut-off safety function in the event of an abnormality. With these features, a single MCU can simultaneously control up to two brushless DC (BLDC) motors.

The embedded hardware accelerator includes both a trigonometric function unit (TFU) and an infinite impulse response (IIR) filter. The TFU performs high-speed calculations without the need for lookup tables, enabling effective use of ROM. The IIR filter offers coefficient setting methods that ease porting from existing algorithms.