Specifications

The main chip on board is the RP2040 made by Raspberry Pi (their first in-house microcontroller chip!) and is a dual-core ARM Cortex M0+ processor, with a flexible clock running up to 133MHz. WiFi is enabled via the use of an Infineon CYW43439.

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  RP2040 microcontroller chip designed by Raspberry Pi in the United Kingdom

  
  


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  Dual-core ARM Cortex M0+ processor, flexible clock running up to 133 MHz

  
  


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  264kB of SRAM, and 2MB of onboard Flash memory

  
  


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  Infineon CYW43439 wireless chip

  
  
  
  
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    IEEE 802.11n wireless LAN

    
    
  
  
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    Bluetooth 5.2

    
    
  
  
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    WPA3

    
    
  
  
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    SoftAP (up to 4 clients)

    
    
  
  
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    Onboard antenna licenced from ABRACON (connected via SPI to the RP2040)

    
    
  
  
  
  


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  Castellated module allows soldering directly to carrier boards

  
  


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  USB 1.1 Host and Device support

  
  


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  Low-power sleep and dormant modes

  
  


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  Drag & drop programming using mass storage over USB

  
  


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  26 multi-function GPIO pins

  
  


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  2×SPI, 2×I2C, 2×UART, 3×12-bit ADC, 16×controllable PWM channels

  
  


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  Real-time clock (RTC)

  
  


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  Temperature sensor

  
  


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  Accelerated floating-point libraries on-chip

  
  


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  8×Programmable IO (PIO) state machines for custom peripheral support

  
  


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  Dimensions (WxLxH)

  
  
  
  
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    Pico W: 21mm x 51.3mm x 3.9mm

    
    
  
  
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    Pico WH: 21mm x 51.3mm x 12.9mm

    
    
  
  
  
  


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  Weight

  
  
  
  
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    Pico W: 4g

    
    
  
  
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    Pico WH: 6g

    
    
  
  
  
  


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  Country of origin

  
  
  
  
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    Pico W: Japan

    
    
  
  
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    Pico WH: Great Britain

    
    
  
  
  
  


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  Product number:

  
  
  
  
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    Pico W: SC0918

    
    
  
  
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    Pico WH: SC0919

    
    
  
  
  
  

Raspberry Pi Pico W Pinout

A few RP2040 GPIO pins are used for internal board functions:

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  GPIO29 OP/IP wireless SPI CLK/ADC mode (ADC3) to measure VSYS/3

  
  


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  GPIO25 OP wireless SPI CS - when high also enables GPIO29 ADC pin to read VSYS

  
  


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  GPIO24 OP/IP wireless SPI data/IRQ

  
  


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  GPIO23 OP wireless power on signal

  
  


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  WL_GPIO2 IP VBUS sense - high if VBUS is present, else low

  
  


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  WL_GPIO1 OP controls the on-board SMPS power save pin (Section 3.4)

  
  


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  WL_GPIO0 OP connected to user LED

  
  

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

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  PIN40 VBUS

  
  


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  PIN39 VSYS

  
  


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  PIN37 3V3_EN

  
  


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  PIN36 3V3

  
  


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  PIN35 ADC_VREF

  
  


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  PIN33 AGND

  
  


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  PIN30 RUN