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.

• RP2040 microcontroller chip designed by Raspberry Pi in the United Kingdom

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

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

• Infineon CYW43439 wireless chip

  • IEEE 802.11n wireless LAN

  • Bluetooth 5.2

  • WPA3

  • SoftAP (up to 4 clients)

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

• Castellated module allows soldering directly to carrier boards

• USB 1.1 Host and Device support

• Low-power sleep and dormant modes

• Drag & drop programming using mass storage over USB

• 26 multi-function GPIO pins

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

• Real-time clock (RTC)

• Temperature sensor

• Accelerated floating-point libraries on-chip

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

• Dimensions (WxLxH)

  • Pico W: 21mm x 51.3mm x 3.9mm

  • Pico WH: 21mm x 51.3mm x 12.9mm

• Weight

  • Pico W: 4g

  • Pico WH: 6g

• Country of origin

  • Pico W: Japan

  • Pico WH: Great Britain

• Product number:

  • Pico W: SC0918

  • Pico WH: SC0919

Raspberry Pi Pico W Pinout

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

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

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

• GPIO24 OP/IP wireless SPI data/IRQ

• GPIO23 OP wireless power on signal

• WL_GPIO2 IP VBUS sense – high if VBUS is present, else low

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

• WL_GPIO0 OP connected to user LED

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

• PIN40 VBUS

• PIN39 VSYS

• PIN37 3V3_EN

• PIN36 3V3

• PIN35 ADC_VREF

• PIN33 AGND

• PIN30 RUN