Single-Chip Solution, Unleashing a New Experience - W55MH32 High-Performance Ethernet Microcontroller

The W55MH32 is a high-performance Ethernet microcontroller launched by WIZnet, offering users an unprecedented integrated experience. This chip combines powerful components. Specifically, a single W55MH32 incorporates a high-performance Arm® Cortex-M3 core with a maximum clock speed of 216 MHz. It is equipped with 1024 KB of FLASH and 96 KB of SRAM to meet storage and data processing requirements. It also integrates a TOE engine, including WIZnet's full-hardware TCP/IP protocol stack, built-in MAC, and PHY, along with an independent 32 KB Ethernet transceiver buffer that can be used by 8 independent hardware sockets. Such a configuration truly realizes an All-in-One solution, providing great convenience for developers.

In terms of packaging specifications, the W55MH32 offers two options: QFN100 and QFN68.

The W55MH32L, in the QFN100 package version, measures 12x12 mm. With abundant resources, it is designed for various complex industrial control scenarios. It has 66 GPIOs, 3 ADCs, a 12-channel DMA, 17 timers, 2 I2Cs, 5 serial ports, 2 SPI interfaces (one of which has I2S interface multiplexing), 1 CAN, 1 USB 2.0, and 1 SDIO interface. Such rich peripheral resources can easily meet the diverse connection requirements in industrial control. Whether it is communicating with various sensors and actuators or supporting complex industrial protocols, it can handle them with ease, making it an ideal choice for the complex industrial control field. There is also the W55MH32Q version in the QFN68 package within the same series. This version is smaller, only 8x8 mm, and has a lower cost, making it suitable for scenarios such as highly integrated gateway modules. The software usage method is the same. For more information and materials, please visit the website http://www.w5500.com/ or send a private message.

In addition, the W55MH32 supports a hardware encryption algorithm unit. WIZnet has also launched TOE+SSL applications, covering TCP SSL, HTTP SSL, and MQTT SSL, adding further protection to network communication security.

To help developers get started quickly and conduct in-depth development, WIZnet has carefully developed a compatible development board based on the W55MH32L chip. The development board integrates the WIZ-Link chip. With just a USB Type-C data cable, functions such as debugging, downloading, and serial port log printing can be easily achieved. All peripherals of the development board are brought out, greatly enhancing its expansion capabilities and facilitating developers to comprehensively evaluate the chip's performance.

If you want to obtain more detailed information about the chip and the development board, including product features, technical parameters, and prices, please visit the official website: http://www.w5500.com/. We look forward to exploring the unlimited possibilities of the W55MH32 with you.

Chapter 1: Preface and Essential Reading for Learning 

1. Learning Sequence of This Article 

This article adopts a modular structure and is divided into two parts: the Basics Section and the Advanced Section.

The Basics Section uses a step - by - step teaching system. It is recommended to study systematically in the order of the chapters. The first six chapters serve as theoretical groundwork and do not contain specific program codes.

The Advanced Section is a collection of advanced application cases. It is recommended to use a thematic learning method, and learners can flexibly choose the learning order according to their individual needs. All complete and runnable program cases are numbered to form an independent practical resource library.

After completing the systematic study of the Basics Section, learners will master the core principles of the M3 architecture and reach the knowledge level of a junior development engineer. 

2. References for This Article

The references for this article are "W55MH32 Reference Manual_V1.0.0" and "W55MH32 Data Manual_V1.0.0". These two are official manuals of WIZnet, which are comprehensive. Due to space limitations, this article cannot cover everything in detail. It mainly focuses on block diagram analysis and code explanation, and omits the detailed description of registers. When studying this article, for the parts related to register descriptions, please refer to these two manuals for a better learning effect.

3. Writing Style of This Article

This article focuses on explaining the peripherals of the W55MH32 and their applications, striving to comprehensively analyze the functional block diagrams and usage methods of each peripheral, enabling readers to fully master the W55MH32 series without any blind spots. Basically, each chapter corresponds to one peripheral, and the main content of each chapter is roughly divided into three parts. The first part is an introduction, the second part is the analysis of the peripheral functional block diagram, and the third part is the code explanation.

The introduction of the peripheral briefly summarizes the peripheral in our own words. We strive to use concise and easy - to - understand sentences, and will not simply copy the description from the data manual.

The analysis of the peripheral functional block diagram is the key point of the chapter. This part will explain the functions of each part of the functional block diagram in detail. It is the essence of learning the W55MH32. Once you master the block diagram of the entire peripheral, you can skillfully use the peripheral and program proficiently. In the future, when learning other models of microcontrollers, it will also be easy. Because even if the microcontroller models are different, the block diagrams of the peripherals are basically the same. This step of learning is relatively boring, but you must persevere to achieve your goals.

The code analysis explains the experiments of using the peripheral, mainly analyzing the code flow and some programming precautions. After mastering the block diagram, the code part will be easy to handle.

4. Supporting Hardware for This Article

The hardware platform supporting this article is the W55MH32L_EVB development board of WIZnet. When studying, if you conduct experiments with this hardware platform, you will achieve twice the result with half the effort. It can save you from various problems encountered during the transplantation process.

5. Technical Discussions of This Article

Due to our limited capabilities, there may inevitably be some errors in this article. Enthusiastic readers are welcome to post errata in the comment sections so that we can improve and do better. Have a pleasant learning experience!

WIZnet is a fabless semiconductor company founded in 1998. Its products include the Internet processor iMCU™, which utilizes TOE (TCP/IP Offload Engine) technology and is based on a unique patented fully hardwired TCP/IP. The iMCU™ is designed for embedded Internet devices in various applications.

WIZnet has more than 70 distributors globally and has offices in Hong Kong, South Korea, and the United States, providing technical support and product marketing services.

The regions managed by the Hong Kong office include Australia, India, Turkey, and Asia (excluding South Korea and Japan).