W55MH32

The W55MH32 is a high-performance 32-bit microcontroller that combines Cortex-M3 processing power with Hardwired TCP/IP for efficient and secure IoT solutions. It operates at up to 216MHz, featuring 1024KB Flash and 96KB SRAM for fast data handling. This dedicated hardware networking stack ensures low latency and reduced CPU overhead, making it ideal for real-time applications. Security is a core focus, with AES, DES, and SHA hardware encryption, a True Random Number Generator (TRNG), and SRAM scrambling to protect sensitive data through network communication.

Block Diagram

Pin Map

Features

• Core: 32-bit Arm® Cortex®-M3 Core − Up to 216MHz operation
• Hardwired TCP/IP stack
• 1024K bytes of Flash memory
• 96K bytes of SRAM
• 12-channel DMA controller
• Hardware encryption algorithm unit
• Generate sequence of true random numbers
• 66 (W55MH32L) / 36 (W55MH32Q) GPIO pins
• Up to 12 different Peripherals
  • 5 (W55MH32L) / 3 (W55MH32Q) USARTs
  • 2 SPI controllers
  • 1 multiplexed I2S controllers
  • 2 I2C controllers
  • CAN interface
  • USB 2.0 full-speed controller
  • SDIO interface (only W55MH32L)
• Supported Network Protocols
  • TCP
  • UDP
  • IPv4
  • ICMP
  • ARP
  • IGMP
  • PPPoE

---

Documentation

Datasheet

Title	Description	Notes
📄 W55MH32 Datasheet[EN]	Technical specifications and features of the W55MH32 chip	-
📄 W55MH32 Datasheet[CN]	Technical specifications and features of the W55MH32 chip	-

Technical Documents

Title	Description	Notes
📄 W55MH32 User Manal[EN]	Technical specifications and features of the W55MH32 chip	-
📄 W55MH32 User Manal[CN]	Technical specifications and features of the W55MH32 chip	-

Software Resources

Driver

Reference Code

The following are the reference codes for W55MH32:

Resource	Description
🔗 W55MH32Lib (EN)	Official WIZnet W55MH32 reference code in Github
🔗 W55MH32Lib (CN)	Official WIZnet W55MH32 reference code in Gitee (CN)
🔗 W55MH32 Package and Flash Algorithm	W55MH32 Package and Flash Algorithm

Application Note

Application Note

Example Name	Description	Notes
🔗 Install KEIL5	Step-by-step setup of Keil MDK (device pack, project template, build, flash, debug)	-

Hardware Resources

Technical Resources

Resource	Description	Notes
🔗 Reference Schematic	Typical application schematic	Includes recommended circuit design

Test & Certification

Resource	Description	Notes
[🔗 Ethernet Compliance Test]	Results and documentation of Ethernet standard compliance tests	Covers IEEE 802.3 physical and protocol layer verification
[🔗 Distance Test]	Cable length performance test results	Verified up to 100m Ethernet cable
[🔗 EMC Test]	Electromagnetic compatibility test reports	Covers conducted and radiated emissions
[🔗 Reliability Test]	Reliability and endurance test reports	Includes thermal cycling and aging analysis
[🔗 Certificate]	Official certification documents	CE, FCC, and RoHS certificates available

Evaluation Boards & Related modules

Related modules

WW55MH32L-EVB

The W55MH32L-EVB is a comprehensive evaluation board built around the W55MH32L microcontroller, designed for high-performance industrial, IoT, and embedded system applications. Powered by a 216MHz 32-bit Cortex-M3 processor, it integrates 1024KB Flash and 96KB SRAM, providing ample memory for complex, real-time applications.

W55MH32Q-EVB

The W55MH32Q-EVB is an advanced evaluation board built around the W55MH32Q microcontroller, offering robust performance and efficient networking capabilities for industrial, IoT, and embedded system applications. Powered by a 216MHz 32-bit processor, it integrates 1024KB Flash and 96KB SRAM, ensuring high-speed data processing.

---