RX65N mid-range MCU — 120 MHz RXv2 with 1 MB Flash
The Renesas R5F565N9EGFP#30 is a 32-bit microcontroller from the RX65N series, built around the RXv2 CPU core running at 120 MHz.
The 120 MHz clock on the RXv2 core gives this MCU enough headroom for real-time control loops — think sensor fusion in a servo drive or protocol stack processing for EtherCAT slave nodes. The 1 MB Flash is sized for moderate firmware images: a full TCP/IP stack plus a CANopen node fits comfortably, and the 78 I/O leave room for parallel LCD interfaces or multiple encoder inputs. The 2.7 V supply rail means it can run from a 3.3 V or 3.0 V rail without a separate regulator, simplifying the power tree.
Connectivity set: Ethernet, CAN, USB, and more
The R5F565N9EGFP#30 integrates Ethernet MAC, CAN (2.0B), USB (host/device), plus multiple SCI, SPI, and I2C channels. For a board that needs to talk to a factory network (Ethernet), a motor drive (CAN), and a local display (SPI or parallel EBI/EMI), this MCU covers all three without glue logic. The QSPI interface also supports external serial Flash for firmware OTA staging or data logging.
No exposed pad to worry about for thermal dissipation, but the plastic body handles the 2.7 V supply's modest power draw.