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Overview

NULA Ether W55RP20​

The NULA Ether W55RP20 is a development board built around the WIZnet W55RP20 - a chip that combines the Raspberry Pi RP2040 with a hardwired W5500 Ethernet controller in a single package. The board has a built-in RJ45 Ethernet port, USB-C for programming and power, a Qwiic connector for I2C peripherals, an onboard microSD card reader, and a JST battery connector for running off a single-cell Li-Ion/Li-Po battery.

Because the TCP/IP stack runs in hardware on the W5500, the RP2040 cores are free for your application code rather than managing network overhead in software.

Which product is this documentation for?​

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Key features​

  • SiP: WIZnet W55RP20 (RP2040 + W5500 in one package)
  • Processor: Dual-core ARM Cortex-M0+ @ 133 MHz
  • SRAM: 264 KB on-chip
  • Flash: 2 MB external
  • Ethernet: Hardwired TCP/IP - TCP, UDP, IPv4, ICMP, ARP, IGMP, PPPoE
  • Simultaneous sockets: Up to 8 independent hardware sockets
  • Ethernet buffers: 32 KB internal TX/RX
  • USB-C: Programming, power, and serial communication
  • Qwiic: Plug-and-play I2C sensor integration
  • MicroSD card reader: Onboard slot with card-detect, wired over SPI1
  • Battery support: JST connector and charge management for single-cell Li-Ion/Li-Po batteries
  • GPIO: Access to RP2040 I/O pins (UART, SPI, I2C, PWM, ADC) - a handful of pins are reserved internally for the W5500, see the hardware details page
  • Logic level: 3.3 V
  • ADC: 12-bit, 0-3.3 V range
  • Development support: Arduino IDE, MicroPython, C/C++ SDK
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GPIO pins are not 5 V tolerant. Connecting 5 V signals directly will damage the board.

You may also need​

Qwiic cable

Qwiic cable

Qwiic (formerly easyC) compatible cables with connectors on both ends, available in various lengths.