80 MHz RXv2 core for real-time motor loops
The R5F524TAAGFF#31 is a 32-bit single-core MCU from the RX24T series, built around the RXv2 core running at 80 MHz. This core includes a single-cycle hardware multiply, which directly benefits the execution of vector-control and FOC (field-oriented control) loops in motor-drive and inverter applications.
Memory map for motor firmware: flash, EEPROM, RAM
Program memory is 256 KB of FLASH (256K x 8), with an additional 8K x 8 dedicated EEPROM block for parameter storage — calibration coefficients, fault logs, or motor profiles that need to survive firmware updates. The 16K x 8 SRAM holds the application stack, RTOS objects, and the ADC buffer for three-phase current reconstruction.
17-channel 12-bit ADC for three-phase sensing
The integrated data converter block provides 17 analog inputs with 12-bit resolution and a single 8-bit DAC. In a typical motor-drive BOM, the 12-bit ADC channels sample the three-phase shunt resistors and the DC-link voltage, while the DAC can output a reference or a test signal. The 17-channel count leaves headroom for a thermistor input and a potentiometer or encoder auxiliary channel.
80-LQFP package — hand-solderable for field repair
The 80-LQFP package (14x14 mm body) uses a 0.65 mm pitch — wide enough for a standard fine-tip iron and flux pen on site. No hot-air station required for removal if the board has through-hole vias under the centre pad. The part is surface-mount, so orientation is marked by pin 1 chamfer on the package corner and a dot on the PCB silkscreen; get it wrong once and the internal protection diodes clamp the supply rail.
Active lifecycle and ROHS3 compliance
ROHS3 compliant.