Round Display for XIAO

Round Display for XIAO

The Seeed Studio Round Display for XIAO is an expansion board compatible with all XIAO development boards.

This round capacitive display has a diameter of 39 mm, and thanks to its 240×240 resolution and 65K colors, it delivers clear and vibrant images. Additionally, it does not have the annoying flat cable protrusion found on many similar displays.

Despite its compact size, this display integrates RTC support, a battery charging chip, a JST 1.25 battery interface for Li-Ion batteries, and a TF (microSD) card slot for memory expansion up to 32GB FAT.

It also offers a simplified development experience, as all pins are accessible and no soldering is required.

With its small form factor, this is a versatile and powerful expansion board that can be used for a wide range of projects, from displaying sensor data to creating interactive interfaces. And yes, even a smartwatch, since the RTC is built in.

Round Display for XIAO Specifications

• Power supply:
  USB Type-C: 5V @35 mA
  Battery Charge: 3.7V @37mA
• Battery connector:
  JST 1.5 connector for 3.7V Li-Ion batteries
• Charging current:
  ~ 485 mA
• RTC battery holder:
  CR927
• RTC chip:
  PCF8563
• Expandable memory:
  TF (microSD) card slot, FAT up to 32GB
• Display:
  1.28″ touchscreen
  240×240 resolution
  65K colours
• Sampling rate:
  100Hz
• Dimensions:
  4.3 x 4.3 cm

Package Contents:
1 x Display Rotondo for XIAO

: XIAO NOT included, can be purchased separately.

Note:
If you want to connect the XIAO ESP32S3 Sense to this display, remember that the preferred microSD slot will be the one on the Sense add-on board. In this case, the microSD card slot on the display will not be used.

Useful resources:

• Charge IC datasheet.
• ETA3410 datasheet .
• RTC PCF8563 datasheet.
• 3D shell diagram for Round Display.
• Wiki Round Display for XIAO.