ST launched the STM32G5 series, a 280MHz Arm Cortex-M33 mixed-signal MCU for industrial power, PV inverters, EV chargers, robotics, and motor control. Clock speed rises from G4's 170MHz to 280MHz, and CoreMark jumps from 569 to 1,136, nearly doubling.
For users tracking G4 peripheral continuity, several changes matter. On PWM, the G474's HRTIM resolution of 184ps improves to 111ps on the G564RE, with 12 PWM outputs. In high-frequency digital power, especially phase-shifted full-bridge designs that adjust power via two PWM phase differences, edge adjustment precision directly affects phase regulation accuracy. Note that only G5x4 parts have HRTIM—don't pick a G5x3 if you need it.
On ADC, the G564RE has three 12-bit ADCs at up to 5MSPS each, versus G474's four 4MSPS but five ADCs. If your board uses multiple synchronized sampling groups, confirm sampling timing and channel arrangement before switching. The G564RE's on-chip comparator propagation delay is 20ns; in motor control, current-sense signals can feed the comparator to shut off PWM via the timer when exceeding a threshold, with the CPU logging faults and handling shutdown—overcurrent protection need not wait for an interrupt to finish.
For FOC, sin/cos coordinate transforms can go to the CORDIC, and the G564RE also has two FMACs to offload digital filtering. Memory is 512KB Flash and 112KB SRAM, including 32KB CCM-SRAM for current-loop code that runs on every interrupt.
For already-mass-produced boards, if G4 runs stable, staying is practical—swapping an MCU requires retesting sampling points and overcurrent shutdown alone. ST's STM32CubeG5 package includes HAL2, low-level drivers, middleware, and example projects; STM32CubeMX2 supports configuration and code generation, STM32CubeIDE for development, X-CUBE-MCSDK for motor control, and X-CUBE-DPOWER for digital power. For evaluation, use the NUCLEO-G564RE board, or the B-G564E-MC1S with examples for direct motor testing. Pricing starts at $1.034 each for 10,000-unit orders.
ICgoodFind Summary: The STM32G5 raises clock speed to 280MHz, doubles CoreMark, and improves HRTIM resolution from 184ps to 111ps—targeting high-frequency digital power and motor control edge-precision needs. But ADC count drops from five on the G474 to three, so multi-group synchronized sampling needs rechecking before migration, and the G5x4 vs. G5x3 HRTIM difference means selection can't rely on series name alone.
