# Seeed Studio Round Display for XIAO (1.28-inch)

**Type:** Product page · **SKU:** SS104030087 · **Brand:** [Seeed Studio](https://core-electronics.com.au/brands/seeed-studio-australia)
**Page:** https://core-electronics.com.au/seeed-studio-round-display-for-xiao-128-inch.html ([markdown](https://core-electronics.com.au/seeed-studio-round-display-for-xiao-128-inch.html.md))

Seeed Studio Round Display for XIAO is an expansion board compatible with all XIAO development boards. It features a fully covered touch screen on one side, designed as a 39mm disc. It contains an onboard RTC holder, charge chip, and TF card slot...

## Pricing

- **Price:** $39.70 (inc GST) — $36.09 AUD, exc GST
- **Quantity discounts:** 10+ $34.65 (exc GST) · 25+ $33.56 (exc GST)

## Availability & dispatch

- Available with a lead time — expect dispatch between Sep 01 and Sep 03.

## Restrictions

Restrictions apply to this equipment as it uses button/coin cell batteries:

- The equipment is intended to be used in trades, professions or industries
- The equipment is not intended for sale to the general public
- The equipment is not intended to be used where children are present
- You are aware that this equipment may not meet child safety testing requirements as it is not intended to be used by consumers or general public, but rather, is intended to be used in trades, professions or industries in conjunction with the limitations and restrictions listed above
- You are aware that these restrictions are due to a change in [A](https://www.accc.gov.au/media-release/businesses-on-notice-as-mandatory-button-battery-laws-commence)[ustralian legislation in 2022](https://www.accc.gov.au/media-release/businesses-on-notice-as-mandatory-button-battery-laws-commence) for button/coin cell batteries
 
![Button Battery Warning](https://core-electronics.com.au/attachments/uploads/iec-button-battery.png)

A declaration of use will need to be submitted during checkout.

## Description

Seeed Studio Round Display for XIAO is an expansion board compatible with all XIAO development boards. It features a fully covered touch screen on one side, designed as a 39mm disc. It contains an onboard RTC holder, charge chip, and TF card slot within its compact size, perfect for interactive displays in smart homes, wearables, and more.

**Features**

- **Capacitive Touch Screen Expansion Board:** Display with 1.28-inch round, 240×240 resolution, 65K colors, providing clear and colorful images exhibition
- **High Compatibility:** Highly compatible with all XIAO series products, easily integrated into your current projects
- **Rich Peripheral:** Feature onboard RTC holder, battery charge chip, TF card slot, and JST 1.25 connector, all within its compact size
- **Watch-sized Design:** Come with 39 mm circular design, suitable for wearable and space-limited projects
- **Plug and Play**: All pins are led out, no soldering is needed
 
Seeed Studio Round Display for XIAO is an extension board with a capacitive touch screen and is compatible with **all XIAO development boards**. It features a fully covered touch screen on one side, designed as a radiant disc with a radius of 39 mm.

With a 1.28-inch **circular touch screen** that has a resolution of 240 x 240 pixels and **65K colors**, this board presents the exhibition of clear and colorful images. It can be applied to design a programmable watch, wearable indicator, etc.

The high integration and rich peripherals on the other side of the XIAO extension board are impressive, with an onboard RTC, TF card slot, **battery charging chip**, and JST 1.25 battery interface, all within a compact 39 x 39mm size. That is, you can have reliable timekeeping, a way to **extend memory up to 32GB** FAT, and a charging method by the lithium battery.

The pins for Seeed Studio XIAO are all led out and there is no soldering needed, which offers a convenient development experience. With its mini size, the XIAO extension board is ideal for wearable and small-volume projects. It is a versatile and powerful extension board that can be used for a wide range of projects, from displaying sensor data to creating interactive interfaces.

**Applications**

- Programmable Touch Watch
- Wearable Indicator
- Visible Control Center
- Gaming Devices
- Interactive Displays
 
Note

The 3D model of the shell for the Round Display can be printed by downloading the file below:

[The 3D model diagram of the shell for Round Display](https://files.seeedstudio.com/wiki/round_display_for_xiao/Round-Display-shell-3D-Model.stl)

**Specifications**

 | Item | Detail |
|---|---|
| Power Supply | USB Type-C: 5V @35 mA  Battery Charge: 3.7V @37mA |
| Battery Connector | 3.7V Li-ion Battery JST 1.25 connector |
| Charge current | ~ 485 mA |
| RTC Battery Holder | CR927 |
| RTC Chip | PCF8563 |
| Expandable memory | TF Card Slot for up to 32GB FAT |
| Screen | 1.28-inch touch screen  240×240 resolution  65K colors |
| Sample Rate | 100Hz |
| Dimension | 43mm x 43mm |

**Hardware Overview**

![](https://wdcdn.qpic.cn/MTY4ODg1NjQ3NTM4MTE0Nw_442088_85cGn9OiDf0jCTcM_1679621273?w=1026&h=668)

**Part List**

 | Seeed Studio Round Display for XIAO | x1 |
|---|---|

**FAQ**

****If I want to connect Seeed Studio XIAO ESP32S3 Sense to this extension screen, will there be a conflict with two TF card slots?****

If you connect XIAO ESP32S3 Sense with this extension screen, the data transmission of the TF card will be applied in the Seeed Studio XIAO ESP32S3 Sense. Meanwhile, the TF card on the screen will not be used.

**Documentation**

- [Charge IC datasheet ](https://core-electronics.com.au/attachments/localcontent/charge-IC-datasheet_91544554135.pdf)
- [ETA3410 datasheet](https://core-electronics.com.au/attachments/localcontent/ETA3410-datasheet_7786708dfde.pdf)
- [RTC PCF8563 datasheet](https://core-electronics.com.au/attachments/localcontent/RTC-PCF8563-datasheet_498306dfbf6.pdf)
- [\[The 3D model diagram of the shell for Round Display\]](https://files.seeedstudio.com/wiki/round_display_for_xiao/Round-Display-shell-3D-Model.stl)
- [Wiki](https://wiki.seeedstudio.com/get_start_round_display/)

## Images

- [Product image 1](https://core-electronics.com.au/media/catalog/product/S/S/SS104030087-1.jpg)