72 MHz is the sweet spot for a control MCU handling a Modbus RTU stack, a PID loop, and a local HMI scan without a second processor. The 48 KB Flash holds a modest firmware image — think a bootloader plus application code for a valve controller or a pump monitor. The 4 KB EEPROM is handy for calibration constants and fault logs that survive a power cycle.
USB on-board — one less chip on the board
The integrated USB peripheral means you can connect this MCU directly to a PC for configuration or data logging without adding a USB-to-UART bridge.
