ET-M12
RP2350 Dev Board
Dual Cortex-M33 / RISC-V 150 MHz, 2 MB flash, USB-C, Qwiic
AED 49.00
Out of stockOverview
Dual Cortex-M33 / RISC-V 150 MHz, 2 MB flash, USB-C, Qwiic
The ET-M12 is built around the Raspberry Pi RP2350A — 2 × Cortex-M33 or 2 × Hazard3 RISC-V at 150MHz, 520KB SRAM, 12 PIO state machines, secure boot.
Two Qwiic / STEMMA QT connectors let you chain it with other boards without soldering, and the 2.54 mm header fits a breadboard.
Designed in Dubai by ElectroTrical — the full schematic, BOM and design notes are published below.
Good for
- PIO tricks and fast I/O
- MicroPython / CircuitPython
- Secure-boot projects
Key features
What makes it different
MCU
Raspberry Pi RP2350A: 2 × Cortex-M33 or 2 × Hazard3 RISC-V at 150MHz, 520KB SRAM, 12 PIO state machines, secure boot
Flash
2MB W25Q16 QSPI
USB
USB-C, ROM UF2 bootloader (hold BOOTSEL, plug in or tap RESET)
I/O
20 GPIO on the header, 3 ADC, SWD header, Qwiic at 3.3V
Qwiic / STEMMA QT
Two JST-SH connectors plus a 2.54 mm header — 3.3 V and 5 V hosts.
Open documentation
Schematic, BOM and layout notes published for every board.
Specifications
Technical specifications
| MCU | Raspberry Pi RP2350A: 2 × Cortex-M33 or 2 × Hazard3 RISC-V at 150MHz, 520KB SRAM, 12 PIO state machines, secure boot |
|---|---|
| Flash | 2MB W25Q16 QSPI |
| USB | USB-C, ROM UF2 bootloader (hold BOOTSEL, plug in or tap RESET) |
| I/O | 20 GPIO on the header, 3 ADC, SWD header, Qwiic at 3.3V |
| Power | 5V USB-C → AP2112K 3.3V; on-chip switching regulator for the 1.1V core |
| Size | 55.9 × 25.4 mm |
|---|---|
| Mounting | 4 × M2.5 holes, 2.54 mm from each corner |
| Connectors | 2 × Qwiic / STEMMA QT (JST SH 4-pin) · 24-pin 2.54 mm header · USB-C 16P receptacle (USB 2.0) — USB-C (power + native USB / bridge) |
| Main IC | RP2350A (LCSC C42411118) |
| Revision | Rev A |
| Libraries | Pico SDK, Arduino-Pico, MicroPython, CircuitPython, Rust embassy-rp |
|---|
Performance
Speed
Pinout
Pin map and connections
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | VBUS | Power | 5V from USB-C |
| 2 | 3V3 | Power | 600mA LDO |
| 3 | GND | Ground | Ground |
| 4 | RUN | Control | Reset (RUN), active low |
| 5 | GPIO0 | GPIO | UART0 TX |
| 6 | GPIO1 | GPIO | UART0 RX |
| 7 | GPIO2 | GPIO | SPI0 SCK |
| 8 | GPIO3 | GPIO | SPI0 TX |
| 9 | GPIO6 | GPIO | PIO / PWM |
| 10 | GPIO7 | GPIO | PIO / PWM |
| 11 | GPIO8 | GPIO | UART1 TX |
| 12 | GPIO9 | GPIO | UART1 RX |
| 13 | GPIO10 | GPIO | SPI1 SCK |
| 14 | GPIO11 | GPIO | SPI1 TX |
| 15 | GPIO12 | GPIO | SPI1 RX |
| 16 | GPIO13 | GPIO | SPI1 CS |
| 17 | GPIO14 | GPIO | PWM |
| 18 | GPIO15 | GPIO | PWM |
| 19 | GPIO16 | GPIO | PWM / PIO |
| 20 | GPIO26 | GPIO | ADC0 |
| 21 | GPIO27 | GPIO | ADC1 |
| 22 | GPIO28 | GPIO | ADC2 |
| 23 | SDA | I²C | GPIO4 — I²C0 SDA (Qwiic) |
| 24 | SCL | I²C | GPIO5 — I²C0 SCL (Qwiic) |
Qwiic / STEMMA QT pins: GND, VIN, SDA, SCL (same on both connectors).
Mechanical
Dimensions and what's in the box
In the box
- 1 × ET-M12 RP2350 Dev Board (assembled)
- 1 × 24-pin 2.54 mm male header, unsoldered
Getting started
- Plug in a Qwiic / STEMMA QT cable, or solder the header and wire VIN, GND, SDA and SCL
- Libraries: Pico SDK, Arduino-Pico, MicroPython, CircuitPython, Rust embassy-rp
Compare
Which USB microcontroller?
| RP2350 Dev Board (this board)This board | ET-M11 STM32F411 Dev Board | ET-M15 SAMD21 Mini Board | ET-M16 CH32V203 RISC-V Board | |
|---|---|---|---|---|
| What it does | Dual Cortex-M33 / RISC-V 150 MHz, 2 MB flash, USB-C, Qwiic | 100 MHz Cortex-M4F with 512 KB flash, USB-C DFU and Qwiic | 48 MHz Cortex-M0+ with native USB, DAC and Qwiic | 144 MHz RISC-V with USB, CAN and 64 KB flash |
| Interface | — | — | — | — |
| Best for | PIO tricks and fast I/O | DSP and fast control loops | USB HID devices | Low-cost USB devices |
| Price | 49 AED | 19 AED | 23 AED | 19 AED |
Downloads
Documents and design files
Need a custom version of this board?
Different connector, size or sensor? We design and build custom variants.