Waveshare rp2040-zero: high-resolution pinout and specs

by Renzo Mischianti · Published 19 September 2022 · Updated 20 August 2024

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Waveshare rp2040-zero high resolution pinout image

Here my selection of rp2040 devices Official Pi Pico - Official Pi Pico W - Waveshare rp2040-zero - WeAct Studio rp2040

PINs

Power Pins

5v – micro-USB input voltage
3V3 – regulated 3.3V output, 300mA max
GND – main ground reference

GPIO Pins

GP0 to GP29 – General Purpose Input Output (GPIO) as well as Pulse Width Modulation (PWM)

I2C Pins

SCL0 – I2C port 0 clock
SDA0 – I2C port 0 data
SCL1 – I2C port 1 clock
SDA1 – IC2 port 1 data

SPI Pins

SCLK0 – SPI port 0 clock
MOSI0 – SPI port 0 data out
MISO0 – SPI port 0 data in
SCLK1 – SPI port 1 clock
MOSI1 – SPI port 1 data out
MISO1 – SPI port 1 data in

ADC Pins

ADC0 – Analog to Digital Converter (ADC) 0
ADC1 – Analog to Digital Converter (ADC) 1
ADC2 – Analog to Digital Converter (ADC) 2
ADC3 – Analog to Digital Converter (ADC) 3

Specs

RP2040-Zero, A Low-Cost, High-Performance Pico-Like MCU Board Based On Raspberry Pi Microcontroller RP2040, with the following key features:

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 on-board Flash memory
USB-C connector, keeps it up to date, easier to use
The castellated module allows soldering direct to carrier boards
USB 1.1 with device and host support
Low-power sleep and dormant modes
Drag-and-drop programming using mass storage over USB
29 × multi-function GPIO pins (20× via edge pinout, others via solder points)
2 × SPI, 2 × I2C, 2 × UART, 4 × 12-bit ADC, 16 × controllable PWM channels
Accurate clock and timer on-chip
Temperature sensor
Accelerated floating-point libraries on-chip
8 × Programmable I/O (PIO) state machines for custom peripheral support

Summary specs

USB Type-C connector
W25Q16JVUXIQ: 2MB NOR-Flash
BOOT button: press it when resetting to enter download mode
RESET button
WS2812: RGB LED
ME621: low dropout LDO, max current 800MA
RP2040: dual-core processor, up to 133MHz operating frequency
RP2040 pins: 10x solder points, 9 of which are for GPIO

How to

Support forum

Datasheet

Schema

rp2040 datasheet

Tips

SPI configuration

To use SPI with this device, you must override the pins_arduino.h to use other SPI pins.

I select the pins from 2 to 4 (you lost I2C, but you can override again to pins 8 and 9).

#pragma once

// Pin definitions taken from:
//    https://datasheets.raspberrypi.org/pico/pico-datasheet.pdf

// For framework 2.4.0 file in 
// rp2040\hardware\rp2040\2.4.0\variants\generic

// LEDs
#define PIN_LED        (25u)

// Serial
#define PIN_SERIAL1_TX (0u)
#define PIN_SERIAL1_RX (1u)

#define PIN_SERIAL2_TX (8u)
#define PIN_SERIAL2_RX (9u)

// SPI
//#define PIN_SPI0_MISO  (16u)
//#define PIN_SPI0_MOSI  (19u)
//#define PIN_SPI0_SCK   (18u)
//#define PIN_SPI0_SS    (17u)

// SPI
#define PIN_SPI0_MISO  (4u)
#define PIN_SPI0_MOSI  (3u)
#define PIN_SPI0_SCK   (2u)
#define PIN_SPI0_SS    (5u)

#define PIN_SPI1_MISO  (12u)
#define PIN_SPI1_MOSI  (15u)
#define PIN_SPI1_SCK   (14u)
#define PIN_SPI1_SS    (13u)

// Wire
//#define PIN_WIRE0_SDA  (4u)
//#define PIN_WIRE0_SCL  (5u)

// Wire
#define PIN_WIRE0_SDA  (8u)
#define PIN_WIRE0_SCL  (9u)

#define PIN_WIRE1_SDA  (26u)
#define PIN_WIRE1_SCL  (27u)

#define SERIAL_HOWMANY (3u)
#define SPI_HOWMANY    (2u)
#define WIRE_HOWMANY   (2u)

#include "../generic/common.h"