STMicroelectronics (ST) is a leading supplier of smart, high-efficiency products and solutions that are relevant to everyday life. With its products everywhere, STMicroelectronics is committed to working with customers to realize smart driving, smart factory, smart city and smart home, as well as the next generation of mobile IoT products.
The STM32 product portfolio offers a wide variety of options, including ARM®Cortex®-M cores (M0, M0, M3, M4, and M7), giving developers the flexibility to find the perfect match for their applications. In particular, pay attention to switching from one device to another. The combination of binary-file compatibility with similar pinout assignments, a proliferation of hardware IPs, and higher-level programming languages greatly simplifies the developer’s life.
However, due to various reasons such as the epidemic and the price of wafer, STM32 chips are out of stock in large quantities and the price rises. At this time, it is a good choice to find a replacement chip that does not need hardware changes. Many manufacturers have achieved domestic 32 – bit MCU replacement. Domestic replacement demand trend is imminent, we have a look at domestic STM32 manufacturers Lingdynamic microelectronics.
Examples are STM32F103 and MM32F103
Overview: 1. STM32F103 is stable, expensive, produced by big-brand manufacturers, with timely service and poor security; 2. MM32F103 has weaker performance and lower price. It is produced by domestic NEEQ companies with general service and better safety.
Resources: 1. STM has rich resources, numerous models and strong selectivity; 2, MM32F103 resources are also a lot, but the model is less, slightly low selectivity; 3. The running speed of MM32F103 is slightly stronger than that of STM32F103, but occasionally unstable; 4. MM32F103 and STM32F103 have the same pin definition as IO, the same kernel, and the program is universal except for the clock, which needs minor modification. However, MM32 has its own library and registers are different, so it will take some time for STM32F103 to completely transplant to MM32F103. 5, encryption comparison: after the reverse research test, the STM32F103 program encryption was cracked only half an hour, while MM32F103 cracked it needed 2 days. Obviously, MM32F103 encryption performance is slightly stronger, but still need to improve, hope that manufacturers make up as soon as possible; 6, after-sales service: STM whether it is burning production or after-sales service have reached the international first-class, MM there are a lot of third party burning device is not supporting perfect, the manufacturer’s agent, the solution provider is also in the establishment, but MM in China belongs to the most direct close to STM, GD brand, the price advantage is great.
The MM32 series is based on the ARM Cortex-M0 and Cortex-M3 cores. Its products include the MM32F series for the general high performance market, the MM32L series for ultra-low power and security applications, and the MM32W series with a variety of wireless connectivity capabilities. MM32Spin series for motor drive and control, and MM32P series for OTP, the same pin and model are fully compatible with STM32, and the replacement cost is very low.