WIZnet Ethernet HAT (Hardware Attached on Top) is a Raspberry Pi Pico pin-compatible board that utilizes a W5100S chip. It supports both 3.3V & 5V. Please refer to this link to find more information about W5100S. Comes without headers, so you'll probably also want to pick up some stacking socket headers to attach it to your Pico. If you have pin headers sticking out of the back of your Pico, you'll want to solder the sockets to the top side of the ethernet board (that's the side with the ethernet connector on). Features Includes W5100S Supports Hardwired Internet Protocols: TCP, UDP, WOL over UDP, ICMP, IGMPv1/v2, IPv4, ARP, PPPoE Supports 4 Independent Hardware SOCKETs simultaneously Internal 16 Kbytes Memory for TX/ RX Buffers Operation Voltage 3.3V / 5V Built-in LDO (LM8805SF5-33V) SPI Interface 5V I/O tolerance 10 / 100 Ethernet PHY embedded Supports Auto Negotiation Full / Half Duplex 10 / 100 Based Built-in RJ45 (RB1-125BAG1A) Pin Description I/O Pin Name Description P VBUS Power supply, 4.3~5.5 Voltage P 3V3 Power supply, 3.3 Voltage P GND Power ground I INTn W5100S Interrupt : Low activity. I RSTn W5100S Reset : Low activity I SPI0 TX SPI MOSI (Master Out Slave In) I SPI0 SCK SPI Clock I SPI0 CSn SPI Slave Select O SPI0 RX SPI MISO(Master In Slave Out) Technical Reference W5100S Datasheet v1.2.5 Schematic & Part list & Gerber File Github Schematic Dimension (Unit : mm) 21 x 68 x 18 (mm) Firmware Examples C/C++ Examples CircuitPython Examples
