LCD screen parameters:
1. Display panel: LCD
2. Display size: 3.49 inches
3. Display resolution: 172 x 640
4. Display colors: 16.7M
5. Display brightness: 350 cd/m2
6. Contrast ratio: 1200:1
7. Display Interface: QSPI
8. Driver chip: AXS15231B
9. Touch interface: I2C
10. Touch type: capacitive sensing
11. Size: model A about 9.269 x 3.48 x 3.18cm, model B about 9.269 x 3.48 x 2.28cm
Features:
1. Powered by ESP32-S3R8 high-performance Xtensa 32-bit LX7 dual-core processor, clocked up to 240MHz
2. Supports 2.4GHz Wi-Fi (802.11 b/g/n) and Bluetooth 5 (LE) with onboard antennas
3. Incorporates 512KB SRAM and 384KB ROM, with 8MB PSRAM stacked and external 16MB Flash
4. Onboard 3.49-inch capacitive touch HD IPS display, 172 × 640 resolution, 16.7M colors, clearly displays color images
5. Equipped with dual microphone array, enabling audio algorithms like noise reduction and echo cancellation, suitable for precise voice recognition and near-field/far-field voice wake-up applications
6. Integrated AXS15231B display driver IC communicating via QSPI and I2C interfaces
7. Onboard QMI8658 six-axis IMU (3-axis accelerometer, 3-axis gyroscope) for detecting device orientation and step counting
8. On-board PCF85063 RTC chip for convenient implementation of real-time clock functionality
9. Two customizable side buttons (PWR, BOOT) for developing user-defined functions
10. On-board 3.7V MX1.25 lithium battery charge/discharge interface or 18650 battery holder
11. Onboard Micro SD card slot for flexible storage expansion and rapid data transfer, suitable for data logging and media playback, simplifying circuit design
12. Reserved 22-pin 2.54mm pitch through-hole pads for connecting external modules or functional expansion, enhancing development flexibility