51 Microcontroller

What Are the Essential Differences Between PLC and Microcontrollers?

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What Are the Essential Differences Between PLC and Microcontrollers?

Search on WeChat Technical Training Can Microcontrollers Replace PLCs? Microcontrollers cannot completely replace PLCs. Although microcontrollers can achieve similar functions through programming, they are relatively less reliable and stable compared to PLCs. PLCs are widely used in industrial control and automation due to their good programmability, real-time performance, and stability. PLCs have the following advantages … Read more

What Phenomena Occur When Microcontrollers Encounter Electromagnetic Interference?

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What Phenomena Occur When Microcontrollers Encounter Electromagnetic Interference?

In microcontroller systems, the issue of electromagnetic compatibility (EMC) is one of the most challenging to resolve. It primarily stems from electromagnetic interference (EMI) both inside and outside the system, which can easily lead to abnormal operation of the microcontroller, thereby affecting the stability and reliability of the entire system. Therefore, it is essential to … Read more

Unique Features of STM32 Low-Power Timer (LPTIM)

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Unique Features of STM32 Low-Power Timer (LPTIM)

When developing low-power products, we pay close attention to the overall power consumption of the system. So, have you looked into the LPTIM low-power timer? 1 Introduction In earlier years, the term LPTIM was rarely heard. With the increasing demand for low-power products, MCU manufacturers have introduced LPTIM timers aimed at low-power applications. Timers are … Read more

STM32 F103C8T6 Boot Configuration Tutorial

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STM32 F103C8T6 Boot Configuration Tutorial

1. What is BOOT? Most beginners are often puzzled by the term BOOT when they first encounter it. Where did this strange thing come from that requires jumper caps? Why do we need to configure it to download programs via serial port? What happens if it is not configured correctly, leading to the microcontroller failing … Read more

Introduction to Bit-Banding Operation of STM32 Microcontroller

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Introduction to Bit-Banding Operation of STM32 Microcontroller

The bit-banding operation of the STM32 microcontroller is a special memory mapping technique that allows developers to perform atomic read and write operations on specific memory bits, thereby improving the efficiency of operations on GPIO ports, registers, and individual bits of other peripherals. 1. Bit-Band Region and Bit-Band Alias Region The memory space of the … Read more

Understanding the Internal Bus of STM32 Microcontroller

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Understanding the Internal Bus of STM32 Microcontroller

The STM32 microcontroller, based on the ARM Cortex-M3 architecture, has a complex and efficient internal bus structure that supports the entire system’s data flow and instruction execution, making it a key learning point for many embedded engineers. Below, we will list the main internal buses of the STM32 microcontroller and their functions. 1. I-Code Bus … Read more

ESP8266 and Zigbee Networked Wall Switch Modification

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ESP8266 and Zigbee Networked Wall Switch Modification

Wireless Communication Solution Before choosing, I had previously encountered Zigbee networking, which is also a commonly used networking method due to its low cost and simplicity. Here are several reasons for choosing this network: Zigbee networks are indeed good. If you don’t want to learn the complex transmission theory and programming of Zigbee communication chips, … Read more

Practical Tutorial on RS-485 Communication Module

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Practical Tutorial on RS-485 Communication Module

Course Details: The “Practical Tutorial on RS-485 Communication Module” is designed and planned by a team of professional electronic engineers from Changxue Electronics, and is recorded exclusively. This course mainly introduces the process, methods, techniques, and design concepts of developing the 51 microcontroller module through the form of module instantiation, focusing on the system design … Read more

RS-485 Communication Module Practical Tutorial

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RS-485 Communication Module Practical Tutorial

To enable communication between devices, there needs to be a bridge connecting the two, which consists of the transmission path and communication protocol. The earliest interface used for device communication was RS232. However, as technology developed, RS232 began to show some limitations, which led to the emergence of new interface standards, one of which is … Read more

Solving Issues in RS485 Applications

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Solving Issues in RS485 Applications

Click the image above to follow “Changxue Electronics” for easy learning of electronic knowledge. Changxue Electronics Subscription Account Daily updates on technical articles in the electronics industry and the latest information on microcontrollers for easy learning anytime, anywhere. 1. Signal Reflection Issues During communication, when there is an impedance mismatch or discontinuity, signal reflection occurs, … Read more