170 MHz Cortex-M4 with FPU — throughput for mixed-signal control
The STM32G484QET6 runs an ARM Cortex-M4 core at 170 MHz with a single-cycle multiply and hardware floating-point unit — the 213 DMIPS ceiling is enough for real-time motor-field-oriented control loops, digital-power PFC algorithms, or multi-axis servo interpolation without an external DSP. On-chip memory pairs 512 KB of flash with 128 KB of SRAM; the flash uses a 4-way set-associative prefetch buffer to keep the core fed at full clock speed without wait-state penalties on sequential code. The 42-channel 12-bit ADC bank samples simultaneously across up to three converters — useful for reading three-phase motor currents plus a DC-link voltage in one conversion cycle. The four 12-bit DAC channels output analog setpoints or reference voltages without external converters.
Peripheral mix and connectivity for fieldbus and instrumentation
Connectivity includes CANbus (two FD-capable controllers), QSPI for external flash or RAM expansion, SAI for digital audio, and a full-speed USB device/host/OTG interface — enough to build a CANopen fieldbus node that logs data to an external NOR flash and streams it over USB. The 107 general-purpose I/O pins are multiplexed across the 128-LQFP package; most are 5 V-tolerant, so level translation is optional when interfacing to legacy 5 V logic or sensor rails. On-chip brown-out detect, power-on reset, and a windowed watchdog reduce the external supervisor count to zero for most designs — the BOR threshold is programmable from the flash option bytes.
The package ships in a tray — no reel or tape; plan for a tray feeder or manual placement in the pick-and-place setup.