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STM32 G4
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Since the release of the first mixed-signal STM32F3 MCU in 2012, the STM32 platform strategy has been further deepened, covering industrial platform applications from low-end to high-end, low-cost to high-performance, and low-power to wireless applications. In particular, in the field of motor and power control, STM32F3 has entered a higher level of integration. Adhering to the principle of “practice makes perfect”, after several years of efforts, STM32F3 has been recognized by more and more users in the fields of motor control and digital power supply, creating a new era of high-integration mixed-signal MCUs.
How can dreams become reality?Only by connecting with reality, going into our users and STM32 fans, understanding their thoughts and needs, can we create more competitive products and make dreams come true.
From the perspective of market demand for motor control, small power variable frequency speed regulation for pumps, white goods, electric bicycles, fans, etc. with a main frequency of 72MHz, based on the Cortex-M4 core, integrating up to 4 operational amplifiers, 7 comparators, and 2 DACs, 4 5MSPS ADCs, STM32F3 meets the market trend requirements. Coupled with the main frequency of 48MHz STM32F0 and the 64MHz STM32G0 entry-level products aimed at cost-sensitive markets, it further strengthens STM32’s platform advantage in motor control, directly targeting single motor, dual motor, single FOC, and dual FOC control. Positioned at the forefront of China’s rapid economic development, STM MCU ranked first in sales in the general-purpose MCU market in 2018 with a historic revenue of $634M! Looking beyond the surface to the essence, for the overall industrial market, such as industrial frequency converters, due to market needs for stronger performance, higher main frequency, and higher integration of MCUs, traditional DSPs and even STM32F3’s resources and computing performance can no longer meet today’s customers’ requirements for mid-to-high-end industrial frequency conversion speed regulation MCUs in terms of performance, cost, and integration. The main contradiction in today’s market lies in the need for cost-effective MCUs to replace the ecologically closed traditional DSPs. The main aspects of the contradiction are computing power, peripheral resources, and cost (easy to use, affordable, competitive) across multiple application markets. To do a good job, you need good tools. Based on the powerful motor control platform ecosystem of STM32, considering the performance, computing power, and peripheral resource limitations of STM32F3, STM32G4 has arrived just in time.
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In terms of computing power, the main frequency has increased from 72MHz of STM32F3 to 170MHz of STM32G4, adding a hardware mathematical operation accelerator (trigonometric functions + digital filtering), enhancing MCU performance, and further establishing STM32G4’s leading performance in motor control. The efficiency of motor control has greatly improved from coordinate rotation transformation, from trigonometric function lookup to direct hardware computation, logarithmic, and square root operations.
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In terms of peripheral resources, the on-chip analog peripherals have reached an unprecedented configuration, with 6 operational amplifiers, 7 comparators, 5 12-bit ADCs with hardware oversampling at 4MSPS, 7 DACs, and higher integration, making the motor control board design simpler and BOM costs more optimized. One STM32G4 can achieve dual motor and three-resistor current sampling, dual FOC control, without the need for additional comparators and operational amplifiers, making it a comprehensive solution for motor control analog peripherals.
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In terms of cost, since STM32G4 is aimed at the “mainstream” application market, its cost positioning is “infinitely close” to today’s STM32F1 and STM32F3. Today, the cost of MCUs in the industrial market is no longer the main bottleneck, allowing our users to focus more on their algorithms and product quality, which is a breakthrough.
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In terms of market applications, the STM32G4 series can operate at a maximum ambient temperature of 125°C, further expanding its application range, especially in some industrial fields with harsh environmental temperatures, such as “hardware board-level embedded” controllers, encoders, four-wheeled vehicle controllers, and digital power supplies working under special environmental conditions.
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Not only for motor control, but also in digital power control, further improving ultra-high precision timer resolution (184 picoseconds), enhancing the precision of digital power control.
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Further enhancing security defenses (flexibly configurable user security storage areas, dual bank flash memory configurations), more effectively protecting users’ intellectual property.
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Inheriting the software and hardware ecosystem of STM32F3, meeting users’ product upgrade needs.
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Added CAN-FD, not only with stronger “load capacity”, faster speed, but also increased to 3 CAN-FD to meet the needs of more CAN bus fieldbus applications.
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Further enriched pin and packaging options, expanding LQFP80 and LQFP128 to meet the demands of more functional applications.
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In terms of motor control hardware and software solutions, to allow more engineers to quickly get started and accelerate product launch, we have prepared integrated hardware and software evaluation tools. More importantly, all motor control algorithms are completely free and open, demonstrating the ambition, vision, and strong confidence in the field of motor control. It’s not about defeating anyone, but about improving oneself, strengthening oneself, enhancing competitiveness, and moving forward, achieving recognition from more users.
In the marketplace, it’s like a battlefield, but we prefer to see it as a market that continuously strengthens itself and elevates product lines to meet customer needs. Based on the mainstream market positioning of STM32G4, it shows our emphasis on the industrial market, especially the motor and digital power markets. What matters in doing things and making products is “sincerity” and having “warmth”. Facing the STM32G4 with “high cost-performance” and a strong ecosystem, are you excited? Then let’s “practice on the project and practice on the product”. The STM32G4 is worth having.
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