STM32G474RET6
STM32G4 MCU with 170MHz Cortex-M4, advanced motor control timers, high-resolution DAC, and rich analog for industrial applications.
Product Overview
Description
The STM32G474RET6 is a high-performance microcontroller featuring the ARM Cortex-M4 core running at 170MHz, designed for advanced motor control and digital power applications.
It includes unique features like high-resolution timers (HRTIM) with 184ps resolution, advanced motor control peripherals, and rich analog integration for precision control applications.
The device offers excellent price-performance ratio for industrial applications requiring advanced timing and control capabilities.
Product Series
Primary Application
Key Features
- ARM Cortex-M4 with FPU at 170MHz
- High-Resolution Timer (HRTIM) with 184ps
- Advanced Motor Control timers
- 5x 12-bit ADCs (up to 4Msps)
- 4x 12-bit DACs with 15Msps
- 4x operational amplifiers
- 7x comparators
Specifications
| Core | ARM Cortex-M4 |
|---|---|
| Frequency | 170 MHz |
| Flash Memory | 512 KB |
| SRAM | 128 KB |
| GPIO | 81 |
| ADC | 5x 12-bit |
| Package | LQFP-64 |
| Voltage Rating | N/A |
| Current Rating | N/A |
| Temperature Range | N/A |
| Operating Voltage | N/A |
| Qualification | N/A |
| Interface | N/A |
| DAC | N/A |
Applications
Digital power supplies
Industrial application for STM32G4 High-Resolution Timer MCU
Motor control and drives
Industrial application for STM32G4 High-Resolution Timer MCU
LED lighting control
Industrial application for STM32G4 High-Resolution Timer MCU
Industrial inverters
Industrial application for STM32G4 High-Resolution Timer MCU
Welding equipment
Industrial application for STM32G4 High-Resolution Timer MCU
FAE Expert Insights
"The STM32G474 is a hidden gem for digital power and motor control applications. The HRTIM (High-Resolution Timer) with 184ps resolution is unique in this price class - it enables precise phase-shifted full-bridge control and resonant converter implementations that are difficult with standard timers. I've used this MCU in several digital power supply designs where it replaced much more expensive DSPs. The rich analog integration (5 ADCs, 4 DACs, 4 op-amps) reduces external component count significantly. The 170MHz Cortex-M4 provides plenty of processing power for complex control algorithms. The price point makes it accessible for high-volume industrial applications. If you're doing digital power or advanced motor control, this MCU deserves serious consideration."
Unique HRTIM with 184ps resolution for precision power control
— Sarah Johnson, BeiLuo
Frequently Asked Questions
What is HRTIM and why is it important?
HRTIM (High-Resolution Timer) is a specialized timer with 184ps resolution, much finer than standard timers. It enables: Precise duty cycle control for resonant converters; Phase-shifted full-bridge control with high accuracy; Complex waveform generation for multi-phase systems; Digital power factor correction with precise timing. The HRTIM includes multiple channels with cross-timer synchronization, dead-time insertion, and fault protection - essential features for power electronics.
Use HRTIM for applications requiring sub-nanosecond timing precision in power conversion.
What motor control features does STM32G4 include?
The STM32G4 includes comprehensive motor control features: Advanced timers with encoder input support; Hall sensor input processing; Break inputs for fault protection; ADC-triggering synchronized to PWM; Cordic accelerator for trigonometric calculations; FMAC (Filter Math Accelerator) for digital filters. These features enable efficient Field-Oriented Control (FOC) implementation for PMSM and BLDC motors. The Motor Control Workbench provides code generation for FOC algorithms.
Use Motor Control Workbench with STM32G4 for rapid motor control development.
How does the Cordic accelerator improve performance?
The Cordic accelerator performs trigonometric calculations (sin, cos, atan2) and hyperbolic functions in hardware, freeing the CPU for other tasks. It's particularly valuable for: Park/Clarke transforms in motor control; FFT calculations for signal processing; Digital filter implementations. The Cordic completes calculations in ~20 cycles vs hundreds of cycles in software, enabling higher control loop frequencies or lower CPU utilization.
Use Cordic for trigonometric calculations in control loops to improve performance.
What is the FMAC and how is it used?
FMAC (Filter Math Accelerator) is a dedicated hardware accelerator for digital filter calculations including FIR and IIR filters. It performs multiply-accumulate operations independently of the CPU, enabling: Real-time digital filtering without CPU overhead; Higher filter orders than software implementation; Simultaneous multiple filter channels. The FMAC is ideal for sensor signal conditioning, audio processing, and control system filtering.
Use FMAC for digital filtering to offload CPU and improve response time.
Can STM32G4 be used for audio applications?
Yes, the STM32G4 is suitable for audio applications with: 4x 12-bit DACs with 15Msps update rate; 5x 12-bit ADCs with 4Msps; FMAC for digital audio filtering; SAI (Serial Audio Interface) for external audio codecs; DMA for efficient data transfer. The combination enables audio playback, recording, and processing applications. The high-speed DACs can directly drive audio outputs for simple applications.
Use external codec with SAI for professional audio. Use internal DACs for simple audio playback.
What is the price advantage of STM32G4 over F4?
The STM32G4 offers significant cost savings compared to F4: Similar performance at 30-40% lower price; Integrated analog reduces external component cost; HRTIM eliminates need for external timing solutions; Smaller packages reduce PCB cost. For digital power and motor control applications, the G4 often replaces more expensive DSPs or FPGAs. The total system cost advantage can be 50% or more compared to discrete implementations.
Evaluate total system cost including external components when comparing G4 to alternatives.