WIZnet Overview

Why WIZnet?

WIZnet is the Easy Internet Connectivity Provider in
Wired and Wireless Solutions

Benefits Include:

  • Core Tech: Hardwired TCP/IP protocol stacks
  • Products: Hardware TCP/IP Chips, Internet MCUs, WiFi Modules, Network modules, Serial-to-Ethernet modules
  • Goal: Providing easy Internet connectivity for embedded devices
  • Openness: Support Open Source movement
Traditional Software TCP/IP
Wiznet Hardwired TCP/IP
  • TCP/IP stack or Embedded OS is needed
  • High performance MCU is needed
  • More memory and management are required
  • To consider many thing to implement
  • Network throughput depends on MCU
  • TCP/IP stack implemented in h/w logic
  • Even 8bit MCU can be used
  • Dont need to change the existing MCU
  • Easy to user (memory interface/SPI)
  • Provide the stable high speed throughput
Conventional Ethernet Solution
WIZnet Ethernet Solution
Resources / Applications

Wiznet Resources & Applications

WIZnet Resources

WIZnet iO Platform OverviewWIZnet iO Platform Overview
WIZnet Smartgrid Technology OverviewWIZnet Smartgrid Technology Overview
WIZnet IPv6 OverviewWIZnet IPv6 Overview
WIZnet Core TechnologyWIZnet Core Technology


Smart Energy
  • Smart Meter / AMR
  • Smart Energy Sensor
  • Smart Home Appliance
Digital Consumer
  • Digital Settop Box & IP-TV
  • Internet Radio
  • VoIP Phone
  • Home Network
  • DVR
  • Network Camera
  • Access Control
  • Alarm
  • Factory Automation
  • POS
  • Barcode Scanner
  • Digital Tachometer
Product Focus: W5100



Full-featured, Single-chip Internet-enabled 10/100 Ethernet Controller



The W5100 is a full-featured, single-chip Internet-enabled 10/100 Ethernet controller designed for embedded applications where ease of integration, stability,performance, area and system cost control are required. The W5100 has been designed to facilitate easy implementation of Internet connectivity without OS. The W5100 is IEEE 802.3 10BASE-T and 802.3u 100BASE-TX compliant.

The W5100 includes fully hardwired, market-proven TCP/IP stackand integrated Ethernet MAC & PHY. Hardwired TCP/IP stack supports TCP, UDP, IPv4, ICMP, ARP, IGMP and PPPoE which has been proven in various applications for several years. 16Kbytes internal buffer is included for data transmission. No need of consideration for handling Ethernet Controller, but simple socket programming is required.

For easy integration, three different interfaces like memory access way, called direct, indirect bus and SPI, are supported on the MCU side.


  • Support Hardwired TCP/IP Protocols TCP, UDP, ICMP, IPv4 ARP, IGMP, PPPoE, Ethernet
  • 10BaseT/100BaseTX Ethernet PHY embedded
  • Support Auto Negotiation (Full-duplex and half duplex)
  • Support Auto MDI/MDIX
  • Support ADSL connection (with support PPPoE Protocol with PAP/CHAP Authentication mode)
  • Supports 4 independent sockets simultaneously
  • Not support IP Fragmentation
  • Internal 16Kbytes Memory for Tx/Rx Buffers
  • 0.18 m CMOS technology
  • 3.3V operation with 5V I/O signal tolerance
  • Small 80 Pin LQFP Package
  • Lead-Free Package
  • Support Serial Peripheral Interface(SPI MODE 0, 3)Multi-function LED outputs (TX, RX, Full/Half duplex, Collision, Link, Speed)
Product Focus: W5200



Hardwired TCP/IP embedded Ethernet Controller



The W5200 chip is a Hardwired TCP/IP embedded Ethernet controller that enables easier internet connection for embedded systems using SPI Interface. By using SPI Interface, the decreased footprint size enables easier implementation for smaller embedded systems. The Hardware TCP/IP stack that is being used in W5200 has been certified throughout years in many applicable fields and provides network protocols such as, TCP, UDP, IPv4, ICMP, ARP, IGMP, PPPoE, and etc. The W5200 chip has both Ethernet MAC and PHY embedded inside; providing all necessary solutions for internet connection. Also, for energy related applicable fields, W5200 provides Power Down mode; minimizing energy consumption.


  • High Speed Serial Peripheral Interface (SPI MODE 0, 3)
  • Hardwired TCP/IP Protocols : TCP, UDP, ICMP, IPv4 ARP, IGMP, PPPoE, Ethernet
  • 10BaseT/100BaseTX Ethernet MAC/ PHY embedded
  • Auto Negotiation ( Full and half duplex, 10 and 100-based )
  • Auto MDI/MDIX (Straight-through or Crossover)
  • ADSL connection (with support PPPoE Protocol & PAP/CHAP Authentication mode)
  • 8 independent sockets simultaneously
  • Internal 32Kbytes Memory for Tx/Rx Buffers
  • Multi-function LED outputs (Full/Half duplex, Link, Speed)
  • Power down mode
  • Wake on LAN
  • 0.18 m CMOS technology
  • 3.3V operation with 5V I/O signal tolerance
  • Lead-Free Package
  • Small & Compace 48 Pin QFN Package
Product Focus: W5300



Fully Hardwired Newtwork protocol Embedded Ethernet Controller



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The W5300 is a fully hardwired newtwork protocol embedded ethernet controller designed for high speed required embedded system.


  • Supports hardwired TCP/IP protocols TCP,UDP, ICMP, IPv4, ARP, IGMPv2, PPPoE, Ethernet
  • Supports 8 independent SOCKETs simultaneously
  • High network performance Up to 80Mbps (DMA)
  • Supports hybrid TCP/IP stack(software and hardware TCP/IP stack)
  • IP Fragmentation is not supported
  • Internal 128Kbytes memory for data communication(Internal TX/RX memory)
  • More flexible allocation internal TX/RX memory according to application throughput
  • Supports memory-to-memory DMA (only 16bit Data bus width & slave mode)
  • Embedded 10BaseT/100BaseTX Ethernet PHY
  • Supports auto negotiation (Full-duplex and half duplex)
  • Supports auto MDI/MDIX(Crossover)
  • Supports network Indicator LEDs (TX, RX, Full/Half duplex, Collision, Link, Speed)
  • Supports a external PHY instead of the internal PHY
  • Supports 16/8 bit data bus width
  • Supports 2 host interface mode(Direct address mode & Indirect address mode)
  • External 25MHz operation frequency (For internal PLL logic, period=40ns)
  • Internal 150MHz core operation frequency (PLL_CLK, period=about 6.67ns)
  • Network operation frequency (NIC_CLK 25MHz(100BaseTX) or 2.5MHz(10BaseT))
  • 3.3V operation with 5V I/O signal tolerance
  • Embedded power regulator for 1.8V core operation
  • 0.18 m CMOS technology
  • 100LQFP 14X14 Lead-Free Package
Product Focus: WIZ820IO



Internet Offload Network Module (Includes W5200)



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WIZ820IO is the internet offload network module that includes W5200 (TCP/IP hardwired chip, include PHY), MAG-JACK (RJ45 with XFMR) with other glue logics. It can be used as a component and no effort is required to interface W5200 and Transformer.

The WIZ820io is an ideal option for users who want to develop their Internet enabling systems rapidly.


  • Plug-in Network Module having W5200 & Mag Jack
  • Usable without H/W design for W5200, Transformer and RJ-45
  • Fast evaluation available for W5200 and MCU in the target board
  • Supports 8 Independent sockets simultaneously
  • Support high speed SPI interface
  • Supports Power down mode and Wake-On-Lan function
  • Very small form factor (PCB Size : 23mm x 25mm)
Development Tools

Development Tools


W3100A-based Serial-Ethernet Module Dev Kit
Quick Test of W3150A+ up to 6Mbps with Atmega 128(8MHz)
inChip Evaluation B/D for PIC developer
EVB for testing whole functions of internet embedded MCU W7100A
W5100 Evaluation B/D for AVR developers
Evaluation board iEthernet W5200
Test board to evaluate the function of W5300 based on ARM920T
Evaluation Board for WIZ100SR
Evalution Board for WIZ105SR
Evalution Board for WIZ107SR
RS422/RS-485 to Ethernet Evaluation Board
Evaluation Board for WIZ120SR
W4 Port, Serial-to-Ethernet, EVAL Board
Evaluation Board for WIZ200WEB
Evaluation Board for WIZ220IO
Evaluation Board for WIZ610WI
Evaluation Board for WIZ620WI module
Evaluation Board for WIZFI210 module
Evaluation Board for WIZFI210 module


Debugger for WIZnet IMCU7100
About WIZnet

WIZnet is a private fabless semiconductor company, founded on 1998 in Korea. Main Product is an Internet Processor, iMCU™, which is specialized by TOE (TCP/IP Offload Engine) technologybased on an unique patented Fully Hardwired TCP/IP. iMCU™ market is Embedded Internet Devices in a wide variety of applications, which is also segmented locally and regionally.

WIZnet set two missions: Glocalization and Open Hardware Platform. Glocalization is for customized technical support to loyal customers. Open Hardware Platform is to become a market-leading standard of Internet Processor in a new ecosystem of electronics industry.