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W5100S-EVB-Pico &endash; Default Title

The W5100S-EVB-Pico is a microcontroller evaluation board based on the Raspberry Pi RP2040 microcontroller chip and full hardwired TCP/IP controller W5100S chip. Read more...

  • Description

The W5100S-EVB-Pico is a microcontroller evaluation board based on the Raspberry Pi RP2040 microcontroller chip and full hardwired TCP/IP controller W5100S chip.

The W5100S-EVB-Pico has the same role as the Raspberry Pi Pico platform and includes W5100S, so Ethernet is included.


  • RP2040 microcontroller with 2MByte Flash
    • Dual-core cortex M0+ at up to 133MHz
    • 264kByte multi-bank high performance SRAM
    • External Quad-SPI Flash with eXecute In Place (XIP)
    • High performance full-crossbar bus fabric
    • 30 multi-function General Purpose IO (4 can be used for ADC)
      • 1.8-3.3V IO Voltage (NOTE. Pico IO voltage is fixed at 3.3V)
    • 12-bit 500ksps Analogue to Digital Converter (ADC)
    • Various digital peripherals
      • 2 × UART, 2 × I2C, 2 × SPI, 16 × PWM channels
      • 1 × Timer with 4 alarms, 1 × Real Time Counter
    • 2 × Programmable IO (PIO) blocks, 8 state machines total
    • Flexible, user-programmable high-speed IO
    • Can emulate interfaces such as SD Card and VGA
  • 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
    • SPI Interface
  • Micro-USB B port for power and data (and for reprogramming the Flash)
  • 40 pin 21x51 'DIP' style 1mm thick PCB with 0.1" through-hole pins also with edge castellations
  • 3-pin ARM Serial Wire Debug (SWD) port
  • 10 / 100 Ethernet PHY embedded
  • Supports Auto Negotiation
    • Full / Half Duplex
    • 10 / 100 Based
  • Built-in RJ45(RB1-125BAG1A)
  • Built-in LDO (LM8805SF5-33V)

Hardware Specification

W5100S-EVB-Pico pinout is directly connected to the GPIO of RP2040 as shown in the picture above. It has the same pinout as the Raspberry Pi Pico board. However, GPIO16, GPIO17, GPIO18, GPIO19, GPIO20, GPIO21 are connected to W5100S inside the board. These pins enable SPI communication with W5100S to use Ethernet function. If you are using the Ethernet function, these pins cannot be used for any other purpose.

The RP2040 GPIO used inside W5100S-EVB-Pico is as follows.

I/O Pin Name Description
I GPIO16 Connected to MISO on W5100S
O GPIO17 Connected to CSn on W5100S
O GPIO18 Connected to SCLK on W5100S
O GPIO19 Connected to MOSI on W5100S
O GPIO20 Connected to RSTn on W5100S
I GPIO21 Connected to INTn on W5100S
I GPIO24 VBUS sense - high if VBUS is present, else low
O GPIO25 Connected to user LED
I GPIO25 Used in ADC mode (ADC3) to measure VSYS/3

Apart from GPIO and ground pins, there are 7 other pins on the main 40-pin interface:

Pin No. Pin Name Description
PIN40 VBUS Micro-USB input voltage, connected to micro-USB port pin 1. Nominally 5V.
PIN39 VSYS Main system input voltage, which can vary in the allowed range 4.3V to 5.5V, and is used by the on-board LDO to generate the 3.3V .
PIN37 3V3_EN Connects to the on-board LDO enable pin. To disable the 3.3V (which also de-powers the RP2040 and W5100S), short this pin low.
PIN36 3V3 Main 3.3V supply to RP2040 and W5100S, generated by the on-board LDO.
PIN35 ADC_VREF ADC power supply (and reference) voltage, and is generated on W5100S-EVB-Pici by filtering the 3.3V supply.
PIN33 AGND Ground reference for GPIO26-29.
PIN30 RUN RP2040 enable pin, To reset RP2040, short this pin low.

Operation Condition

Item Description
Operation Temperature MAX 85C (including self-heating)
Operation Temperature MIN -20C
VBUS DC 5V (+/- 10%)
VSYS Min DC 4.3V
VSYS Max DC 5.5V

Recommended maximum ambient temperature of operation is 70C.

Technical Reference

Schematic & Part list & Gerber File

Firmware Example