RXv3 core at 120 MHz — what the speed rating buys you
The Renesas R5F56609BGFB#30 is a 32-bit microcontroller built around the RXv3 CPU core, clocked at 120 MHz. That clock rate, combined with a single-cycle multiply and hardware divide, pushes real-time loop closure in motor-drive and power-conversion applications without an external DSP or FPGA. The 1 MB on-chip Flash and 128 KB RAM (organized as 128K x 8) keep the BOM lean for control firmware that would otherwise spill into external memory.
Memory map and on-chip storage
Program memory is 1 MB of Flash (1M x 8), enough for a full Modbus TCP stack, a CANopen node, and a PID loop with logging. The 32 KB EEPROM (32K x 8) handles calibration constants and fault logs without wear-leveling concerns — it is true EEPROM, not emulated Flash. The 128 KB SRAM (128K x 8) supports multiple frame buffers or a small RTOS heap.
Analog and peripheral density
Twenty-four 12-bit ADC channels and two 12-bit DAC channels cover current-sense, voltage-monitor, and setpoint-output needs on a single chip. The peripheral set includes DMA, LVD, POR, PWM, and WDT — enough to run a safety watchdog and a PWM-driven H-bridge without external glue logic.
Temperature grade and operating environment
Rated for -40°C to 105°C ambient. Supply range is 2.7 V to 5.5 V.
Lifecycle and compliance
ROHS3 compliant. No last-time-buy risk for new designs.