120 MHz Cortex-M4F with integrated Ethernet and CAN — what it means for a connected-control BOM
It carries 1 MB of program Flash and 256 KB of SRAM, plus 6 KB of EEPROM for configuration parameters that survive a power cycle. The part is built for industrial and infrastructure edge nodes that need a real-time control core and multiple wired fieldbuses on a single die — Ethernet MAC+PHY, two CAN 2.0B controllers, and USB OTG are all on-chip, so a gateway design avoids an external PHY or CAN transceiver on the MCU side.
Peripheral set for a single-chip gateway
Beyond Ethernet and CAN, the connectivity list includes SSI (synchronous serial), I²C, UART/USART with IrDA, and a QEI for quadrature encoder decoding. The 20-channel 12-bit ADC samples at rates suitable for current-sense feedback in a motion-control PWM loop. Brown-out detect and POR are integrated, so an external supervisor is optional for cost-sensitive builds.
Housed in a 128-TQFP with a 14x14 mm body and 0.4 mm pitch, the package is hand-solderable in rework and compatible with standard QFP sockets for prototyping. The exposed pad (thermal pad) needs a via-stitched ground plane on the top layer to pull heat out; without it, continuous 120 MHz operation at 105°C ambient pushes the junction toward the limit.