RP2350-Touch-LCD-2.1B - Development board with 2.1" round capacitive touch display 480x480 + 2.5D panel - Waveshare 32703

Description

The Waveshare RP2350-Touch-LCD-2.1B is designed for the development and prototyping of devices with graphical user interfaces. The board is based on the RP2350B microcontroller designed by Raspberry Pi and features a dual-core architecture with a choice between ARM Cortex-M33 cores or Hazard3 RISC-V cores. The microcontroller operates at a clock frequency of up to 150 MHz and includes 520 kB of SRAM and 16 MB of onboard Flash memory, with the option to expand using external PSRAM.

The integrated 2.1" round IPS display with a resolution of 480 x 480 px supports 65K colors and provides wide viewing angles. The capacitive touch panel with an I2C interface supports single-point touch input, enabling intuitive user interaction.

The board integrates multiple peripheral components, including a 6-axis IMU, an RTC chip, a TF card slot, a buzzer, and a 3.7 V lithium battery connector with charging support. Available communication interfaces include SPI, I2C, UART, ADC, PWM, and programmable PIO blocks. Programming is supported using C/C++, MicroPython, and the Arduino IDE, with USB mass storage mode available.

The 2.1B version is equipped with a 2.5D curved capacitive touch panel.

                                                                                                                    Controller board layout

1. RP2350B - Dual-core and dual-architecture design, up to 150MHz operating frequency
2. PSRAM chip solder pads - Compatible with mainstream PSRAM chips for user expansion (soldering required)
3. 16MB Nor Flash
4. TF card slot
5. RTC chip - PCF85063 RTC chip
6. 12C header - Connecting with internal chip, only supports the 12C peripherals and cannot be mapped to other functions
7. UART header
8. Buzzer
9. PIO-USB port - USB host or device through PIO
10. RTC Batt. header - for connecting rechargeable RTC Batt. (only supports rechargeable RTC Batt.)
11. QMI8658 - 6-axis IMU includes a 3-axis gyroscope and a 3-axis accelerometer 
12. USB Type-C port - for programming, USB 1.1 with device and host support
13. Power supply indicator
14. Charging Indicator - When connecting the system Batt, lights up when charging, off when fully charged
15. Batt. power supply control switch
16. RESET button
17. BOOT button - Press it when resetting to enter download mode
18. System Batt. header - MX1.25 2PIN connector, for 3.7V Lithium Batt., supports charging and discharging
19. 12PIN multi-functional pin header
20. DEBUG interface

                                                                                                                              Pin definition

Features

• Microcontroller: RP2350B
• Architecture: dual-core ARM Cortex-M33 or dual-core Hazard3 RISC-V
• Clock frequency: up to 150 MHz
• SRAM: 520 kB
• Flash memory: 16 MB
• Display type: IPS
• Display size: 2.1"
• Resolution: 480 x 480 px
• Number of colors: 65K
• Display interface: SPI + RGB
• Display controller: ST7701
• Touch panel: capacitive
• Touch interface: I2C
• Touch controller: CST820
• Touch panel type: 2.5D curved
• Touch support: single-point
• IMU: 6-axis (accelerometer + gyroscope)
• RTC: PCF85063
• Card slot: TF
• Interfaces: 2 x SPI, 2 x I2C, 2 x UART
• ADC: 5 x 12-bit
• PWM: 9 channels
• PIO: 12 state machines
• USB: USB 1.1 device/host (Type-C)
• GPIO: 9 multi-function pins
• Power supply: USB Type-C or 3.7 V Li-Ion battery
• Supported environments: C/C++, MicroPython, Arduino IDE

Kit includes

• Waveshare RP2350-Touch-LCD-2.1B development board
• SH1.0 12-pin cable ~100 mm
• 2 x SH1.0 4-pin cable ~100 mm