RXv2 core at 120 MHz — what it buys on the board
The R5F56517BGFB#30 is a 32-bit RXv2 MCU clocked at 120 MHz, with 768 KB of flash and 256 KB of RAM on a single die. That clock and memory envelope handles a real-time control loop plus a TCP/IP stack without external memory — the 256 KB SRAM leaves room for packet buffers and the application heap after the RTOS footprint.
111 I/O lines in a 144-LQFP package give you enough pins to keep a legacy 100-pin sensor array or motor-drive interface without a CPLD. On-chip Ethernet, USB, CAN, and QSPI mean the board can talk to a plant network and a local HMI with one MCU — no external PHY for the Ethernet MAC, and the USB interface handles device or host mode.
Temperature range and supply — industrial fit
Lifecycle status is Active — no end-of-life notice, no successor forced on the BOM yet.
144-LQFP with 0.5 mm pitch — a standard fine-pitch QFP that a rework station can handle with a hot-air nozzle and a stencil. No BGA reball, no X-ray inspection. The 20x20 mm body fits a two-layer board if you route the outer rows first; inner rows need a four-layer stack-up for clean fan-out.