RP2350 development board with 3.49" IPS capacitive touch display 172x640 - RP2350-Touch-LCD-3.49-EN - Waveshare 32776

Description

Development board based on the RP2350B microcontroller, designed for developing and testing advanced embedded applications, user interfaces, and multimedia systems. The integrated 3.49-inch IPS capacitive touch display with a 172 x 640 resolution enables the creation of clear, vertically oriented user interfaces without the need for external display modules.

The RP2350B microcontroller features a unique dual-core, dual-architecture design, allowing operation with either two ARM Cortex-M33 cores or two Hazard3 RISC-V cores, with a clock frequency of up to 150 MHz. This approach enables flexible architecture selection depending on project requirements and allows experimentation with the RISC-V platform in a stable hardware environment.

The board integrates the AXS15231B LCD and touch controller, communicating via QSPI and I2C interfaces respectively, as well as an audio codec, microphone, TF card slot, 6-axis IMU, RTC chip, and an extensive set of communication interfaces and GPIOs. Support for low-power operating modes, drag-and-drop programming via USB, and compatibility with C/C++, MicroPython, and Arduino IDE make the board suitable for educational, prototyping, and product-oriented applications.

The availability of numerous GPIO pins, SPI, I2C, UART, USB interfaces, and ADC and PWM channels enables easy integration with external modules and expansion of system functionality.

                                                                                                                          Controller board layout

1. RP2350B - Dual-core and dual-architecture design, up to 150 MHz operating frequency
2. 16MB Nor Flash
3. PCF85063 - RTC clock chip, supports time retention
4. ES8311 audio codec chip - high-performance, low-power audio DAC
5. Microphone - audio capture
6. 3.49inch display panel connector
7. USB Type-C connector - for programming, USB 1.1 with device and host support 
8. TF card slot
9. QMI8658 - 3-axis gyroscope and 3-axis accelerometer, suitable for applications such as attitude sensing and motion recognition
10. 16PIN 2.54mm pitch through-hole pads - for connecting external modules and enabling functional expansion
11. DEBUG interface - for debugging and downloading program
12. MX1.25 2PIN Lithium Batt, header - MX1.25 2PIN connector, for 3.7V Lithium Batt, supports charging and discharging
13. MX1.25 2PIN speaker header - audio signal output, for connecting an external speaker
14. BOOT button - Press it when resetting to enter download mode
15. PWR power button - for power ON/OFF control, supports customizable functions
16. RESET button
17. CHG Indicator - Lithium Batt. charging indicator
18. 18650 Batt. holder

                                                                                                                                       Pin definition

Features

• Microcontroller: RP2350B
• Architecture: Dual-core, ARM Cortex-M33 or Hazard3 RISC-V
• Clock frequency: up to 150 MHz
• SRAM: 520 kB
• Flash memory: 16 MB
• Display: IPS capacitive touch
• Display size: 3.49 inch
• Display resolution: 172 x 640
• Color depth: 16.7 M
• Brightness: 350 cd/m²
• Contrast ratio: 1200:1
• Display interface: QSPI
• LCD & touch controller: AXS15231B
• Touch type: Capacitive
• Touch interface: I2C
• Audio codec: ES8311
• Microphone: Onboard
• IMU sensor: QMI8658, 6-axis
• RTC chip: PCF85063
• USB connector: USB Type-C, USB 1.1 device/host
• Memory card slot: TF
• GPIO: 16 multifunction pins
• Interfaces: 2 x SPI, 2 x I2C, 2 x UART, HSTX
• ADC: 6 x 12-bit channels
• PWM: 16 channels
• Low-power modes: Sleep, Dormant
• Battery connector: MX1.25 2-pin, 3.7 V
• Battery holder: 18650
• Supported environments: C/C++, MicroPython, Arduino IDE