UNIT ELECTRONICS DualMCU User manual

DualMCU
RP2040 + ESP32
SKU: UE0002
Product Reference Manual (V1.2)
Description
Unit DualMCU brings the Raspberry Pi
RP2040 microcontroller plus an Espressif
ESP32 WROOM chip in a simple one
module, make the most of the dual core
32-bit Arm® Cortex®-M0+ to make Internet
of Things projects with Bluetooth® and
Wi-Fi connectivity.
DualMCU has been thought of as a mix
between two 32-bit microprocessors: a
Raspberry RP2040 cortex M0+ running at
133 Mhz and an Espressif ESP32 running
up to 240 MHz, in this way we implement all
the power of both microcontrollers in a
single development card. With a PCB size
of 36mm x 84mm and using surface mount
technology, four programmable cores with
wireless functions and features are found
with very low power consumption.
Both microcontrollers can communicate
via serial protocol by simply activating a
2-way DIP SWITCH, for example, we can
program the ESP32 as a wireless
co-processor to provide the RP2040
microcontroller with WIFI or BLUETOOTH
communication. For programming, there is a
mechanical selector that allows us to select
which MCU connects using a single USB type
C connector.
Interconnect a large number of I2C
devices using its STEMMA, QWIIC and
GROVE compatible JST-SH I2C connectors
and dive into real-world projects with the
onboard RGB 2020 and WS2812B LED.
With over 46 general purpose pins
(GPIO), DualMCU exposes most output
ports of both microcontrollers via pin
headers and JST-SH connectors
(STEMMA, QWIIC and GROVE I2C
compatible). It has more common
peripherals such as: UART, I2C, SPI, PWM,
ADC, Touch and state machines. The
multiple forms of connection to sensors,
actuators or even between both
microcontrollers will only be limited by your
creativity.
1Unit Electronics ® DualMCU RP2040+ESP32 Modified: 26/06/2023

DualMCU
RP2040 + ESP32
SKU: UE0002
Among its available connectors, it has a
Micro SD socket for high-capacity
memories (up to 64 GB tested) directly
connected to the ESP32 microcontroller
through SPI communication.
Optionally, the ATECC608A can be
incorporated and used for authentication
tasks, which can be accessed by both MCUs
through selection pads for I2C
communication.
The DualMCU also features a 3.7V LiPO
battery charging system making it ideal for
applications that require a portable and
rechargeable wireless system. Battery
charging is done through its USB Type-C
connector or through an external source
such as a solar cell connected by its
dedicated VIN pin for external power
sources.
Applications.
Internet of Things (IoT), prototyping,
machine learning, evaluation &
development.
Support.
DualMCU is supported in the Arduino
development environment and Python
Integrated Development Environment
(IDE) such as Thonny via an interactive
prompt (REPL) to execute commands
immediately in mycropython and
circuitpython programming language.
2Unit Electronics ® DualMCU RP2040+ESP32 Modified: 26/06/2023

DualMCU
RP2040 + ESP32
SKU: UE0002
Features
Raspberry Pi RP2040 Microcontroller
● 133MHz 32bit Dual Core Arm®
Cortex®-M0+
● 264kB on-chip SRAM
● Direct Memory Access (DMA)
controller
● Support for up to 16MB of off-chip
Flash memory via dedicated QSPI
bus
● Programmable IO (PIO) for extended
peripheral support
● 30 GPIO pins, 4 of which can be used
as analog inputs
● 4 channel ADC with internal
temperature sensor, 0.5 MSa/s, 12-bit
conversion
● 16 PWM channels
● SWD Debugging
● 2 UARTs
● 2 SPI controllers
● 2 I2C controllers
● 8 PIO state machines
● USB 1.1 controller and PHY, with host
and device support
● 2 on-chip PLLs to generate USB and
core clock
● 40nm process node
● Multiple low power mode support
● Internal Voltage Regulator to supply
the core voltage
● Advanced High-performance Bus
(AHB)/Advanced Peripheral Bus
(APB)
Memory
● W25Q16JVUXIQ 2MB NOR Flash
● 532MHz Quad SPI
● 66MB/S continuous data transfer rate
● 100K program/erase cycles
● More than 20-year data retention
Espressif ESP32 WROOM 32
Wi-Fi/Bluetooth® Module
● 240MHz 32bit Dual Core Xtensa LX6
● 520kB on-chip SRAM
● 448 Kbyte ROM for booting and core
functions
● 8 MB Integrated SPI flash
● 1 kbit EFUSE (non- erasable memory)
for MAC addresses, module
configuration, Flash-Encryption, and
Chip-ID
● IEEE 802.11b/g/n (802.11n up to 150
Mbps) single-band 2.4 GHz Wi-Fi
operation, center frequency range of
operating channel (2412 ~ 2484 MHz)
● Bluetooth® 4.2 BR/EDR and
Bluetooth LE specification, NZIF
receiver with –97 dBm sensitivity,
Class-1, class-2 and class-3
transmitter, AFH
● +12 dBm transmitting power, the
internal PCB antenna in the module
eliminates the need for an external
antenna
● ADC, I2C, SDIO, QSPI, UART, I2S,
Two-Wire Automotive Interface
(TWAI®), compatible with ISO11898-1
(CAN Specification 2.0)
● On-chip Hall Sensor
WS2812B LED
● RGB NeoPixel for full color indication
● Connected to RP2040 GPIO
RGB LED
● Common Anode
● Connected to ESP32 GPIO
Builtin LED
● LED for general purpose blinking,
connected to RP2040 GPIO25
3Unit Electronics ® DualMCU RP2040+ESP32 Modified: 26/06/2023

DualMCU
RP2040 + ESP32
SKU: UE0002
MicroSD CARD
● Connected to ESP32 vía VSPI
ATECC608A (do not populate component)
● Authentication chip connected to
ESP32 or RP2040 accessed by both
MCUs through selection pads for I2C
communication
I/O
44 x GPIO pins with following capabilities:
● 11 of which can be used as 12-bit
ADC - Analog to Digital Converter
inputs (4 from RP2040 and 7 in the
ESP32 microcontroller)
● 42 of which can be used as Digital Pin
(26 from RP2040 and 16 in the
ESP32 microcontroller)
● 3 x UART peripherals (2 UARTs in the
RP2040 and 1 in the ESP32)
● 2 x SPI (one from RP2040 and one in
the ESP32)
● 3 x I2C (Two of which have a JST-1.0
mm pitch on-board connectors,
compatible with STEMMA QT, QWIIC
and GROVE devices with no
soldering)
● All 26 digital pins of RP2040 can be
driven by the PWM block with a
maximum of 16 controllable PWM
outputs
●All ESP32 pins digital outputs can be
used as PWM pins (GPIOs 36 and 39
can't generate PWM)
● 3 x Capacitive Touch Sensor from
ESP32 microcontroller
● ESP32 CAN 2.0
Power
● 3.3 v LDO 600 mA
● 3.3V Power/enable pin
● VUSB Output /VIN (3.2 - 6 V) Pin
● Built in 200mA+ lipoly charger with
charging status indicator LED
Connector
● 2 x I2C JST-SH (1 mm pitch)
● 1 microSD Card Holder
● 1 USB Type C
● 1 JST-SH Battery Connector (2 mm
pitch)
Switch
● Power Switch
● USB Communication Selector
● DIP Switch for UART communication
● Reset button and Bootloader select
button for RP2040 quick restarts (no
unplugging-replugging to relaunch
code)
● ESP32 Reset button and Flash/Boot
button for manually entering flash
mode
OSC
● 12 MHz crystal for perfect timing
4Unit Electronics ® DualMCU RP2040+ESP32 Modified: 26/06/2023

DualMCU
RP2040 + ESP32
SKU: UE0002
CONTENTS
1 The Board
1.1 Accessories
2 Ratings
2.1 Recommended Operating Conditions
3 Functional Overview
3.1 Block Diagram
3.2 Board Topology
3.3 Processor
3.4 Wi-Fi/Bluetooth® Connectivity
3.5 External Memory
3.6 Cryptography IC
3.7 RGB LED
3.8 WS2812B LED
3.9 MicroSD Card Socket
3.10 Power Switch
3.11 Mechanical selector for the USB
Communication
3.12 DIP Switch for UART Communication
3.13 Power Tree
4 Connector Pinouts
4.1 J1 USB-C
4.2 JP1
4.3 JP2
4.4 RP2040 SWD JP3
4.5 RP2040 I2C JST1
4.6 ESP32 I2C JST2
4.7 JST3 Battery Connector
5 Board Operation
5.1 Getting Started with Micropython -
Thonny IDE
5.2 Installing the micropython interpreter
on the RP2040
5.3 Examples (Micropython)
5.4 Micropython hello world on the
RP2040
5.5 Getting Started - Arduino IDE
5.6 Hello world on the ESP32 from
Arduino IDE
6 Mechanical Information
7 Company Information
8 Reference Documentation
9 Appendix
9.1 Schematic
5Unit Electronics ® DualMCU RP2040+ESP32 Modified: 26/06/2023

DualMCU
RP2040 + ESP32
SKU: UE0002
1 The Board
1.1 Accessories
USB type C cable
40-pin 2.54mm male headers
20-pin 2.54mm male headers
2 Ratings
2.1 Recommended Operating Conditions
Symbol
Description
Min
Typ
Max
Unit
VIN
Input voltage from VIN pin
4
5
6
V
VBUS
Input voltage from USB connector
4.6
5
5.5
V
VUSB
Output voltage from VUSB pin
4.4
4.8
5.2
V
VBAT
Output battery voltage
3.2
3.7V
4.25
V
V3v3
3.3V output to user application
3.25
3.3
3.35
V
I3v3
3v3 output current (including onboard IC)
600
-
-
mA
VIH
(RP2040)
Input high-level voltage
2
-
3.6
V
VIL
(RP2040)
Input low-level voltage
-0.3
-
0.8
V
IOH Max
(RP2040)
Current at VDD-0.4v, output set high
8
mA
IOL Max
(RP2040)
Current at VSS+0.4v, output set low
8
mA
VOH
(RP2040)
Output high voltage, 8 mA
2.62
-
3.3
v
VOL
(RP2040)
Output low voltage. 8 mA
0
-
0.5
V
RPU
(RP2040)
Pull-Up Resistance
50
-
80
kΩ
RPD
(RP2040)
Pull-Down Resistance
50
-
80
kΩ
IIOVDD_MAX
(RP2040)
Maximum Total IOVDD current*
50
mA
6Unit Electronics ® DualMCU RP2040+ESP32 Modified: 26/06/2023

DualMCU
RP2040 + ESP32
SKU: UE0002
IIOVSS_MAX
(RP2040)
Maximum Total VSS current due to IO
(IOVSS)**
50
mA
TOP
(RP2040)
Operating temperature
-20
-
80
°C
VIH
(ESP32)
Input high-level voltage
2.475
-
3.6
V
VIL
(ESP32)
Input low-level voltage
-0.3
-
0.825
V
IOH Max
(ESP32)
Current at VDD=3.3V, VOH >=2.64V,
output set high***
40
mA
IOL Max
(ESP32)
Current at VDD = 3.3 V, VOL =0.495 V,
output set low
28
mA
VOH
(ESP32)
Output high voltage
2.64
-
3.3
V
VOL
(ESP32)
Output low voltage
-
-
0.33
V
RPU
(ESP32)
Pull-Up Resistance
-
45
-
kΩ
RPD
(ESP32)
Pull-Down Resistance
-
45
-
kΩ
TOP
(ESP32)
Operating temperature
-40
-
85
°C
* Sum of all current being sourced by GPIO and QSPI pins
**Sum of all current being sunk into GPIO and QSPI pins
***Per-pin current sourced in the same domain is gradually reduced from around 40 mA to around 29 mA,
VOH>=2.64 V, as the number of current-source pins increases
7Unit Electronics ® DualMCU RP2040+ESP32 Modified: 26/06/2023

DualMCU
RP2040 + ESP32
SKU: UE0002
3 Functional Overview
The RP2040 microcontroller alongside with the ESP32 MCU and the on-board leds and
on-boards connectors, provides opportunities for low-power Internet of Things (IoT)
development and whatever your microcontroller application, from motor control to machine
learning, from digital audio to automotive, the DualMCU RP2040 & ESP32 has the
performance, feature set, and support to make your product fly.
3.1 Block Diagram
Block Diagram of DualMCU RP2040 + ESP32
8Unit Electronics ® DualMCU RP2040+ESP32 Modified: 26/06/2023

DualMCU
RP2040 + ESP32
SKU: UE0002
3.2 Board Topology
Front View
Front View of DualMCU RP2040 + ESP32 Topology
Ref.
Description
Ref.
Description
U1
Raspberry pi RP2040 Microcontroller
U4
CH340C USB bus convert IC
U2
Espressif ESP32 WROOM Wi-Fi/Bluetooth®
Module
U5
MCP73831 Battery Charge Management IC
U3
W25Q16JVUXIQ 2MB Flash IC
U6
AP2112K 3v3 LDO Voltage Regulator
L1
Power On LED
L2
Charge LED
L3
Builtin LED
L4
WS2812B LED
L5
RGB 2020 LED
J1
Male USB Type C Connector
PB1
RP2040 Reset Button
PB2
RP2040 Boot Button
PB3
ESP32 Flash Button
PB4
ESP32 Reset Button
JP1
RP2040 GPIO Header
JP2
ESP32 GPIO Header
JP3
RP2040 (SWD) Debug Header
JST1
RP2040 I2C JST Connector
JST2
ESP32 I2C JST Conector
JST3
JST Connector for LiPo Battery
SW2
USB Communication Selector
SW3
UART DIP Switch
9Unit Electronics ® DualMCU RP2040+ESP32 Modified: 26/06/2023

DualMCU
RP2040 + ESP32
SKU: UE0002
Back view
Back View of DualMCU RP2040 + ESP32 Topology
Ref.
Description
Ref.
Description
U7
ATECC608A-MAHDA-T Crypto IC
J2
Micro SD Card Connector
SW1
Power Switch
SB1
Charge LED Solder Bridge
(disconnected)
SB2
VBUS Sense Solder Bridge
(disconnected)
SB3
Steps ADC3 Leakage Solder Bridge
(disconnected)
SB4
ESP32 Reset Solder Bridge
(disconnected)
SB5
SCL Signal Selector Solder Bridge for
ATECC608A-MAHDA-T
(disconnected)
SB6
SDA Signal Selector Solder Bridge for
ATECC608A-MAHDA-T
(disconnected)
B1
Lipo Battery Solder Pads
3.3 Processor
The DualMCU is powered by a revolution of the Raspberry Pi RP2040 silicon microcontroller
(U1) manufactured on a modern 40nm process node is the debut microcontroller from
Raspberry Pi and it brings signature values of high performance and ease of use to the
microcontroller space.
With a large on-chip memory, six independent banks of 264 KB SRAM, direct memory
access, two symmetric Arm® Cortex®-M0+ clocked at 133MHz, deterministic bus fabric and
10 Unit Electronics ® DualMCU RP2040+ESP32 Modified: 26/06/2023

DualMCU
RP2040 + ESP32
SKU: UE0002
rich peripheral set augmented with a unique Programmable I/O (PIO) subsystem, Serial
wire debug (SWD) available from boot through the integrated JP3 header, a USB 1.1 device
interface implemented for uploading code and 2MB of off-chip Flash memory via dedicated
QSPI bus on the RP2040, all these outstanding features provide professional users with
unrivalled power and flexibility.
The RP2040 controls the peripherals and digital pins, as well as analog pins (A0-A3). The
I2C JST connections (SDA) and (SCL) are used for connecting to the onboard peripherals
and are optionally pulled up with a 4.7 kΩ resistor.
Wi-Fi and Bluetooth® connectivity is provided by the Espressif ESP32 WROOM-32 (U2)
3.4 Wi-Fi/Bluetooth® Connectivity module, clocked up 240 MHz and 512 KB on-chip SRAM
and 4 MB integrated SPI Flash memory. Multiple programmable GPIOs, ADC, I2C, UART,
Capacitive Touch Sensor and Two-Wire Automotive Interface (TWAI®), compatible with
ISO11898-1 (CAN Specification 2.0) are exposed via JP2 y JP1 pin headers.
The ESP32 module includes a dual core Xtensa LX6 CPU that can also be programmed
independently of the RP2040 through the USB mechanical selector (SW2) via a CH340C
USB bus convert IC (U4).
3.5 External Memory
The RP2040 (U1) has access to an external 2 MB of flash memory (U3) via a QSPI
interface. All the application code and data must be stored in an external flash chip. Six
dedicated pins are used to communicate with a separate QSPI flash, using execute-in-place
(XIP) technology to run code directly from flash without needing to copy it to RAM first.
3.6 Cryptography IC
Optionally, the ATECC608A can be incorporated and used for authentication tasks, which
can be accessed by both MCUs through selection pads for I2C communication. The
ATECC608A Cryptographic IC (U7) provides secure boot capabilities alongside SHA and
AES-128 encryption/decryption support for security in Smart Home and Industrial IoT (IIoT)
applications.
3.7 RGB LED
The common anode RGB LED (L5) is also controlled by the ESP32 module such that the
LED is on when the digital state is LOW and off when the digital state is HIGH.
11 Unit Electronics ® DualMCU RP2040+ESP32 Modified: 26/06/2023

DualMCU
RP2040 + ESP32
SKU: UE0002
3.8 WS2812B LED
The WS2812B (L4) led is an intelligent control RGB NeoPixel for full color indication
integrated in a 3535 component package and is connected to RP2040 at pins GPIO16 for
intelligent digital port (DI) and GPIO17 for power enable.
3.9 MicroSD Card Socket
The DualMCU interfaces a microSD card with ESP32 using the microSD card socket
connected via an SPI interface. Using a microSD card becomes very handy for applications
where we need to store files that are larger than the size of SPIFF (flash file system) of
ESP32.
3.10 Power Switch
The toggle power switch (SW1) provides the utility to turn the DualMCU ON or OFF and
allows battery charging even when the power switch is in the off position.
3.11 Mechanical selector for the USB Communication
The mechanical USB selector (SW2) allows the programming and serial USB
communication from one MCU at the time with only one USB Type-C connector.
Positions for the mechanical USB selector
12 Unit Electronics ® DualMCU RP2040+ESP32 Modified: 26/06/2023

DualMCU
RP2040 + ESP32
SKU: UE0002
3.12 DIP Switch for UART Communication
The DIP switch (SW3) allows the UART communication between both MCUs, connecting
RP2040-UART0 (Tx_GPIO0 & Rx_GPIO1) to ESP32-UART1 (RX_IO17 & TX_IO16)
respectively.
3.13 Power Tree
The DualMCU can be powered by either the USB-C port (J1) or alternatively via VIN on JP1.
The VIN pin also delivers the USB voltage from J1 (approx 4.8 V) when the external power
supply on the VIN does not exist. An AP2112K LDO Voltage Regulator provides 3V3 to the
RP2040 and ESP32 microcontrollers and all other peripherals. The maximum voltage supply
for VIN is 6 V and the nominal current of AP2112K is 600 mA.
DualMCU RP2040 & ESP32 Power Tree
13 Unit Electronics ® DualMCU RP2040+ESP32 Modified: 26/06/2023

DualMCU
RP2040 + ESP32
SKU: UE0002
4 Connector Pinouts
DualMCU RP2040&ESP32 General Pinout
4.1 J1 USB-C
Pin
Function
Type
Description
2 , 11
VBUS
Power
5V USB Power
A7 , B7
D-
Differential
USB differential data-
A6 , A6
D+
Differential
USB differential data+
1 , 12
GND
Power
Ground
14 Unit Electronics ® DualMCU RP2040+ESP32 Modified: 26/06/2023

DualMCU
RP2040 + ESP32
SKU: UE0002
DualMCU RP2040&ESP32 JP1 Pinout
4.2 JP1
Pin
Function
Type
Description
1
3v3
Power
3.3V Power
2
3v3
Power
3.3V Power
3
VN
Analog
ESP32 Sense Vp, ADC1-CH3,
RTC_GPIO3, GPIO39
4
VP
Analog
ESP32 Sense Vn, ADC1-CH0
RTC_GPIO0, GPIO36
5
IO25
Analog, RTC, Digital
ESP32: DAC1/ ADC2-CH8/
RTC_GPIO6/ GPIO25
15 Unit Electronics ® DualMCU RP2040+ESP32 Modified: 26/06/2023

DualMCU
RP2040 + ESP32
SKU: UE0002
6
IO26
Analog, RTC, Digital
ESP32: DAC2/ ADC2-CH9/
RTC_GPIO7/ GPIO26
7
GND
Power
Ground
8
GND
Power
Ground
9
CIPO
Digital
RP2040: digital pin GPIO4/
Controller In, Peripheral Out
10
COPI
Digital
RP2040: digital pin GPIO7/
Controller Out, Peripheral In
11
IO11
Digital
RP2040: digital pin GPIO11
12
IO14
Digital
RP2040: digital pin GPIO14
13
TX1
Digital
RP2040: digital pin GPIO8/
UART1_TX_PIN
14
RX1
Digital
RP2040: digital pin GPIO9/
UART1_RX_PIN
15
TX0
Digital
RP2040: digital pin GPIO0/
UART0_TX_PIN
16
RX0
Digital
RP2040: digital pin GPIO1/
UART0_RX_PIN
17
IO15
Digital
RP2040: digital pin GPIO15
18
IO10
Digital
RP2040: digital pin GPIO10
19
IO3
Digital
RP2040: digital pin
GPIO03/SCL_1
20
IO2
Digital
RP2040: digital pin
GPIO02/SDA_1
21
MOSI
Digital
RP2040: digital pin
GPIO19/SPI
22
SCK
Digital
RP2040: digital pin
GPIO18/SPI
23
CS
Digital
RP2040: digital pin
GPIO21/SPI
24
MISO
Digital
RP2040: digital pin
GPIO20/SPI
25
IO23
Digital
RP2040: digital pin GPIO23
16 Unit Electronics ® DualMCU RP2040+ESP32 Modified: 26/06/2023

DualMCU
RP2040 + ESP32
SKU: UE0002
26
IO22
Digital
RP2040: digital pin GPIO22
27
A0
Analog/Digital
RP2040: analog pin GPIO26
28
A1
Analog/Digital
RP2040: analog pin GPIO27
29
A2
Analog/Digital
RP2040: analog pin GPIO28
30
A3
Analog/Digital
RP2040: analog pin GPIO29
31
3v3
Power
3.3V Power
32
AREF
Analog
NC
33
IO25
Digital
RP2040: digital pin GPIO25
34
IO6
Digital
RP2040: digital pin GPIO06
35
GND
Power
Ground
36
GND
Power
Ground
37
RUN/RESET
Digital
RP2040: Reset
38
3EN
Digital
AP2112K: Enable
39
VBAT
Power
Battery Voltage Output
40
VUSB
Power
VUSB: Output Pin / Input Pin
Each UART can be connected to a number of GPIO pins as defined in the GPIO muxing table in Section 2.19.2
of RP2040 official datasheet: https://datasheets.raspberrypi.com/rp2040/rp2040-datasheet.pdf .
17 Unit Electronics ® DualMCU RP2040+ESP32 Modified: 26/06/2023

DualMCU
RP2040 + ESP32
SKU: UE0002
DualMCU RP2040&ESP32 JP2 Pinout
4.3 JP2
Pin
Function
Type
Description
1
3v3
Power
3.3V Power
2
RST
Digital
ESP32: Reset
3
IO2
Analog, Digital
ESP32: ADC2-CH2, GPIO2,
TOUCH T2, RTC_GPIO12
4
IO0
Digital
ESP32:DTR, GPIO0
5
GND
Power
Ground
6
GND
Power
Ground
18 Unit Electronics ® DualMCU RP2040+ESP32 Modified: 26/06/2023

DualMCU
RP2040 + ESP32
SKU: UE0002
7
RX1
Digital
ESP32: UART2 - RXD,
GPIO16
8
IO15
Analog, Digital
ESP32: ADC2-CH3, GPIO15,
TOUCH T3, RTC_GPIO13
9
TX1
Digital
ESP32: UART2 - TXD,
GPIO17
10
IO4
Analog, Digital
ESP32: ADC2-CH0, GPIO15,
TOUCH T0, RTC_GPIO10
11
SCK
Digital
ESP32: SPI-SCK, GPIO18
12
CS
Digital
ESP32: SPI-CS, GPIO05
13
MOSI
Digital
ESP32: SPI-MOSI, GPIO23
14
MISO
Digital
ESP32: SPI-MISO, GPIO19
15
SDA
Digital
ESP32: I2C-SDA, GPIO21
16
RX0
Digital
ESP32: UART0 - RXD, GPIO1
17
SCL
Digital
ESP32: I2C-SCL, GPIO22
18
TX0
Digital
ESP32: UART0 - TXD, GPIO3
19
GND
Power
Ground
20
GND
Power
Ground
19 Unit Electronics ® DualMCU RP2040+ESP32 Modified: 26/06/2023

DualMCU
RP2040 + ESP32
SKU: UE0002
DualMCU RP2040&ESP32 JP3 Pinout
4.4 RP2040 SWD JP3
Pin
Function
Type
Description
1
3v3
Power
3.3V Power
2
RUN/RESET
Digital
RP2040: Reset
3
SWDIO
Digital
Serial Wire Debug
4
SWCLK
Digital
Serial Wire Debug
5
QSPI_SS
Digital
Bootsel
6
GND
Power
Ground
20 Unit Electronics ® DualMCU RP2040+ESP32 Modified: 26/06/2023