Motor control is where a microcontroller stops being a sequencer and becomes a real-time compute engine. Field-oriented control, six-step commutation, and closed-loop servo all lean on the same silicon features: advanced timers with complementary PWM and dead time, fast current-sampling ADCs, and enough core to run the loop. Artery targets its AT32F4 line at exactly this. This guide covers the selection logic and the in-stock parts to compare.
1. The silicon that matters for motors
- Advanced control timers — complementary outputs, dead-time insertion, brake input. Non-negotiable for bridge driving.
- Fast, synchronized ADC — sample phase current at the right instant, every cycle.
- Core headroom — Cortex-M4 with FPU for FOC estimation; more clock, smoother loop.
- Analogue front end — op-amp and comparator peripherals reduce external parts.
2. Motor-control parts we stock
| Part | Notes | Link |
|---|---|---|
| AT32F403ACGT7 | Artery AT32F4, motor/industrial tier | AT32F403ACGT7 |
| STM32G431CBU6 | Cortex-M4, motor-control focused (G4) | STM32G431CBU6 |
| STM32F405RGT6 | Cortex-M4, mainstream F4 reference | STM32F405RGT6 |
| TMS320F28335PGFA | TI C2000 DSP, high-end motor control | TMS320F28335PGFA |
| TMS320F28075PTPT | TI C2000 DSP, modern motor/control | TMS320F28075PTPT |
3. Selection by loop complexity
- Mainstream FOC / BLDC — an AT32F4 or STM32G4-class part is plenty; confirm timer channels and dead time.
- High-end / very fast loops — a C2000 DSP class device earns its place with dedicated motor peripherals.
- Benchmark on the bench — measure loop jitter and current-ripple, not just theoretical MIPS.
See the microcontroller range. Send your topology (BLDC/PMSM/servo), voltage and quantity for a quote across the real short list.
Frequently asked questions
What MCU features matter for motor control?
Motor control lives on the timers: advanced control timers with complementary PWM, dead-time insertion, and brake inputs; plus fast ADCs for current sampling and enough core to run the control loop. A Cortex-M4 with FPU helps with field-oriented control math.
Is the AT32F403ACGT7 suitable for motor control?
It sits in the AT32F4 performance tier, which is the line Artery targets at motor control and industrial use, so it is a reasonable candidate. Confirm the specific advanced-timer channels, dead-time capability and ADC sampling against your topology on the bench before design-in.
How does an AT32F4 compare to an STM32F4 or a DSP for motors?
An STM32F4-class part is the natural reference; a C2000-class DSP (TMS320F28xxx) adds dedicated motor-control peripherals and deterministic control for tougher drives. Pick by loop complexity: AT32F4 for mainstream FOC, DSP for high-end or very fast loops.
Do you stock motor-control MCUs for comparison?
Yes. We stock the Artery AT32F403ACGT7 plus in-stock STM32G4, STM32F4 and TI C2000 DSP parts so you can compare the real short list.
About us & trademarks: JTDZ Tech (Shenzhen Jingteng Electronics Technology Co., Ltd.) is an independent distributor of electronic components. We are not an authorised distributor or representative of the manufacturers named in this article. Manufacturer and part names are used for indicative purposes only, to help identify the components discussed; all trademarks remain the property of their respective owners. Always verify specifications against the official datasheet before design-in or purchase.
Recommended next steps
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