48 MHz Cortex-M4 with 1 MB Flash — memory headroom for connected control
The R7FS3A17C2A01CBJ#AC0: With 1 MB of on-chip flash and 192 KB of SRAM, it has room for a full RTOS, a TCP/IP stack, and a local data-logging buffer without external memory. An integrated 8 KB EEPROM block stores calibration constants or configuration parameters that survive power loss — useful for field-calibrated instruments or boot-configuration flags.
Analog and connectivity — one chip for sensor fusion and fieldbus
A 26-channel, 14-bit successive-approximation ADC captures multiple analog sensor inputs — pressure, temperature, current — without an external multiplexer. Two 8-bit DACs and one 12-bit DAC provide analog output for set-point control or waveform generation. The peripheral set includes CAN, USB, QSPI, SD/MMC, and multiple UART/SPI/I²C interfaces, so this MCU can act as a gateway between a CAN-based machine controller and a USB-connected HMI panel, logging data to an SD card over the MMC/SD interface.
Supply range and temperature grade — industrial and battery-tolerant
The 121-LFBGA package measures 8x8 mm with a 0.65 mm ball pitch — a standard 4-layer PCB with via-in-pad can fan out all signals.
Renesas lists this part as Active (current production) and ROHS3 compliant. The Synergy S3 platform is a long-life roadmap family with multiple package and memory variants — if a future design needs more flash or a smaller footprint, a pin-compatible sibling within the S3 series is likely available.