The new RA2T1 devices include a range of features designed to enhance motor control, particularly in single-motor systems. One of the most notable features is a 3-channel S&H function that simultaneously detects the three-phase current values of brushless DC (BLDC) motors. This method provides superior control accuracy compared to sequential measurement methods. The RA2T1 MCUs also offer a complementary timer pulse-width modulation (PWM) function, enabling automatic dead-time insertion and the generation of an asymmetric PWM. This function is optimized for inverter drives, simplifying the implementation of the control algorithm.
The RA2T1 devices offer safety features that are critical in motor control applications. They provide a port output enable function and a high-speed comparator that work together to shut down the PWM output when an overcurrent is detected. The shutdown state can be selected according to the inverter specifications.
Main features of the RA2T1 group MCUs
Core: Arm Cortex-M23 at 64 MHz
Memory: 64 KB flash, 8 KB SRAM, 2 KB data flash
Analog peripherals: 12-bit ADC with 3-channel sample and hold, temperature sensor, internal reference voltage, 2-channel high-speed comparators
System: high, medium, and low-speed on-chip oscillators; clock output; power-on reset; voltage sensing; data transfer controllers, event and interrupt link; Low-power modes
; Safety: PWM forced shutdown, SRAM parity error checking, ADC self-diagnostics, clock frequency accuracy measurement, memory unauthorized access detection;
Operating temperature range: Ta = -40 °C to 125 °C;
Operating voltage: 1.6 V to 5.5 V;
Packages: 48-LQFP, 32-LQFP, 48-QFN, 32-QFN, 24-QFN (4 mm x 4 mm);
The new RA2T1 group MCUs are compatible with Renesas' Flexible Software Package (FSP). The FSP enables faster application development by providing all the necessary infrastructure software, including multiple RTOSs, BSPs, peripheral drivers, middleware, connectivity, networking, and security stacks, as well as reference software for building complex AI, motor control, and cloud solutions. It allows customers to integrate their own legacy code and RTOS of choice with the FSP, providing complete flexibility in application development. Using the FSP will facilitate the migration of motor control designs to other devices in the RA series.
