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RP2040 is a 32-bit dual ARM Cortex-M0+ microcontroller integrated circuit^[1]^[2]^[3] by Raspberry Pi Ltd. In January 2021, it was released as part of the Raspberry Pi Pico board.^[1] Its successor is the RP2350 series.

Overview

Announced on 21 January 2021, the RP2040 is the first microcontroller designed by Raspberry Pi Ltd.^[1]^[2] The microcontroller is low cost, with the Raspberry Pi Pico being introduced at US$4 and the RP2040 itself costing US$1. The microcontroller can be programmed in assembly, C, C++, Swift,^[4] Free Pascal, Rust,^[5] Go,^[6] MicroPython, CircuitPython,^[1]^[7] Ada^[8] and TypeScript.^[9] It is powerful enough to run TensorFlow Lite.^[1]

At announcement time, four other manufacturers (Adafruit, Pimoroni, Arduino, SparkFun) were at advanced stages of their product design, awaiting the widespread availability of chips to be put in to production.^[10]

Hackaday notes the benefits of the RP2040 as being from Raspberry Pi, having a good feature set, and being released in low-cost packages.^[11]

Multiple stepping levels of the chip have been produced.^[12]

Features

The chip is 40 nm silicon in a 7 × 7 mm QFN-56EP surface-mount device (SMD) package manufactured by TSMC^[13]

Key features:^[14].
- 133 MHz dual ARM Cortex-M0+ cores (ARMv6-M) (supports overclocking^[3])
  - Each core has an integer divider peripheral, and two interpolators.
- 264 KB SRAM in six independent banks (four 64 KB, two 4 KB)
- No internal flash or EEPROM memory (after reset, the boot-loader loads firmware from either external flash memory or USB into internal SRAM)
- QSPI bus controller supports up to 16 MB of external flash memory
- DMA controller, 12 channel, 2 IRQ. (NOTE: RP2350 family has 16 and 4).
- AHB crossbar, fully-connected
- On-chip programmable low-dropout regulator (LDO) to generate core voltage
- Two on-chip PLLs to generate USB and core clocks
- 30 GPIO pins, of which four can optionally be used as analog inputs

Peripherals:
- One USB 1.1 (LS & FS) controller and PHY, host and device support, 1.5 Mbps (Low Speed) and 12 Mbps (Full Speed).
- Two UART controllers.
- Two SPI controllers.
- One QSPI (quad SPI) controller (SSI), supports 1 / 2 / 4-bit SPI transfers, 1 chip select.
- Two I²C controllers.
- Eight PIO (programmable input–output) state machines. (NOTE: RP2350 family has 12).
- 16 PWM channels. (NOTE: RP2350 family has 24).
- 4-channel 12-bit 500-ksps SAR ADC, extra channel is connected to internal temperature sensor. (NOTE: RP2350 family has 4 or 8 depending on package).

Boards

A number of manufacturers have announced their own boards using the RP2040. A selection of the growing number is here:

Board name	Manufacturer	Size (mm)	Header pins	Debug connection	Number of pads	USB connector	Other connectors	Flash size	GPIO pins	ADC pins	Buttons	Other features
Pico^[15]	Raspberry Pi Ltd	51×21	40+3	via headers	6	micro-USB		2 MB	26	3	BOOTSEL
Pico W^[16]	Raspberry Pi Ltd	51×21	40+3	via headers	6	micro-USB		2 MB	26	3	BOOTSEL	Wi-Fi, Bluetooth
XIAO RP2040^[17]	Seeed Studio	20×17.5×3.5	14	Reset Button/ Boot Button		USB Type-C interface		2 MB			BOOTSEL + RESET
Nano RP2040 Connect^[18]	Arduino	45×18	30	via pads	5+4+2	micro-USB		16 MB			1	Wi-Fi, Bluetooth, 9-axis IMU, microphone
Tiny 2040^[19]	Pimoroni	22.9×18.2×6	8+3	via headers		USB-C		8 MB	12	4	BOOTSEL + RESET
Keybow 2040^[20]	Pimoroni	76x76x30	0 (USB only)			USB-C		2 MB			16 keys
PicoSystem^[21]	Pimoroni	96.6×42.7×15.5	0 (self contained)			USB-C		16 MB			4 + joypad	Color 240×240 LCD, onboard battery
Feather RP2040^[22]	Adafruit	51×23×7	28	via pins		USB-C	STEMMA QT, lipo battery	8 MB	21	4	BOOTSEL + RESET	Battery charger
ItsyBitsy RP2040^[23]	Adafruit	36×18×4	33	via headers		micro-USB		4 MB	23	4	BOOTSEL + RESET
Metro RP2040^[24]	Adafruit	71x53×13	32	SWD + 3 pin JST SH compatible		USB Type-C	DC jack for 6-12VDC / STEMMA QT / SWD / pico probe	16 MB	24	4	BOOTSEL + RESET	NeoPixel LED, Micro SD
QT Py RP2040^[25]	Adafruit	22×18×6	14	Reset Button/ Boot Button		USB-C	STEMMA QT	8 MB	13	4	BOOTSEL + RESET	3.3vdc regulator, NeoPixel LED
Pro Micro – RP2040^[26]	Sparkfun	36×18	24		4+2	USB-C	QWIIC	16 MB	20	4	BOOTSEL + RESET
Thing Plus RP2040^[27]	Sparkfun	59×23	28	JTAG pins		USB-C	QWIIC, lipo battery	16 MB	18	4	BOOTSEL + RESET	Battery charger
MicroMod RP2040^[28]	Sparkfun	22×22	0			edge connector	edge connector	16 MB	29	3	none
Müsli USB Pmod^[29]	Lone Dynamics	45×20.32	12	SWD		USB Type-A female	12-pin male PMOD, SWD	256 KB	8	0	BOOTSEL	USB host, 5V boost converter
Werkzeug USB Multi-Tool^[30]	Lone Dynamics	50×50	32			USB-C	12-pin female PMOD, USB Type-A female	1 MB	24	4	BOOTSEL	USB device/host, PMOD
RP2040^[31]	WeAct Studio	53x21.52	40+4	via headers		USB-C		2 MB, 4 MB, 8 MB, 16 MB	26	4	BOOTSEL + RESET
RP2040-Zero^[32]	Waveshare Electronics	23×18	23			USB-C	10-pad connector	2 MB	29	4	BOOTSEL + RESET	RGB LED (WS2812)
Pico2040	zeankun.dev	51x18	40+3 (2mm and 2.54mm variants are available)	SWD	4	micro-USB		16 MB, 32 MB, 64 MB, 128 MB	28	4	BOOTSEL + RESET
Bus Pirate 5	Where Labs, LLC	60x37	10+9	SWD		USB-C		16MB
W5100S-EVB-Pico^[33]	WIZnet Co., Ltd.	75x21	40+3	via headers		Micro-USB	RJ45	2 MB	26	3	BOOTSEL + RESET	Ethernet
W5500-EVB-Pico^[34]	WIZnet Co., Ltd.	75x21	40+3	via headers		Micro-USB	RJ45	2 MB	26	3	BOOTSEL + RESET	Ethernet
W6100-EVB-Pico^[35]	WIZnet Co., Ltd.	75x21	40+3	via headers		Micro-USB	RJ45	2 MB	26	3	BOOTSEL + RESET	Ethernet
WizFi360-EVB-Pico^[36]	WIZnet Co., Ltd.	75×21	40+3	via headers		Micro-USB		2 MB	26	3	BOOTSEL + RESET	Wi-Fi
0xCB-Helios^[37]	0xCB	36×18	40+3	via headers		USB-C		16 MB	29		BOOTSEL + RESET	default off red power LED, blue user LED, level shifter to drive 5V components. ESD protection chip onboard
Picopad^[38]	Pájeníčko s.r.o.	129x53	12	via headers		micro-USB	microSD, external connector	2 MB	6		BOOTSEL + RESET	on-off, Wi-Fi, micro SD card, external connector, IPS screen, speaker, battery
MUREX ANYESC^[39]	MUREX Robotics	78×35	3	via headers		USB-C	edge connector	8 MB	3	0	BOOTSEL + RESET	commercial ESC connector, 3 user LEDs
RP2040-PICO30^[40]	OLIMEX Ltd	51×21	40+3	via headers		USB-C	Optional UEXT (pUEXT)	2 MB	30	4	BOOTSEL + RESET	3.3V 2A (3A peak) DCDC, All 30 GPIOs available to the user, Optional status LED
RP2040-PICO30-16^[40]	OLIMEX Ltd	51×21	40+3	via headers		USB-C	Optional UEXT (pUEXT)	16 MB	30	4	BOOTSEL + RESET
PicoUSB^[41]	VoltMake^[42]	45×12x4	0 (USB only)			Dual sided USB-A		2 MB			BOOTSEL + MODE	status LED