The W5100 chip is a Hardwired TCP/IP embedded Ethernet controller that enables easier Internet connection for embedded systems

W5100 suits users in need of stable Internet connectivity best, using a single chip to implement TCP/IP Stack, 10/100 Ethernet MAC and PHY

Hardwired TCP/IP stack supports TCP, UDP, IPv4, ICMP, ARP, IGMP, and PPPoE, …, which has been proven through various applications over many years

W5100 uses a 16ytes internal buffer as its data communication memory

By using W5100, users can implement the Ethernet application they need by using a simple socket program instead of handling a complex Ethernet Controller

It is possible to use 4 independent hardware sockets simultaneously

BUS (Direct & Indirect) & SPI (Serial Peripheral Interface) are provided for easy integration with the external MCU

Key Features Hardwired TCP/IP protocols : TCP, UDP, ICMP, IPv4, ARP, IGMP, PPPoE Un-attackable hardware network engine for preventing network attacks such as flooding, spoofing, injection Host Interface : Direct/Indirect Bus & Serial Peripheral Interface (SPI MODE 0, 3) 4 Independent hardware socket Internal 16Kbytes memory for TCP/IP packet processing 10BaseT / 100Base TX Ethernet PHY Embedded Support Auto-Negotiation (Full & Half Duplex, 10 & 100 Based) Support Auto-MDIX 3

3V Operation with 5V I/O signal tolerance LED outputs (TX, RX, full/half duplex, Collision, link, speed) 80LQFP lead-free package (10x10mm) Block Diagram Download Documents Datasheet W5100 Chip Datasheet v1

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8 Last Update: 2019

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23 Erratasheet W5100 Chip Erratasheet v2

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05 Limitation Note Limitation Note – ARP problem in the NLB environment Last Update: 2018

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12 W5100 Qualification Report W5100 Qualification Report W5100 Temperature Test Report (High & Low Temperature) W5100 RoHS Report W5100 Application Note W5100 Application Note How to implement DNS How to implement DHCP How to use Multi-casting How to use ADSL (PPPoE) Drivers / Protocol Libraries ioLibrar