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As of 2025-07-24

TWELITE STAGE HAT Datasheet

Latest Edition

TWELITE STAGE HAT is a board that enables easy connection between Raspberry Pi and TWELITE DIP.

When used with the TWELITE STAGE APP, it can send commands such as monitoring data from TWELITE or TWELITE PAL, or turning on child device LEDs. Additionally, it allows configuration and rewriting of TWELITE without the need for TWELITE R2.

Component Names

1 Raspberry Pi Connector

Connector for connecting to the GPIO port of the Raspberry Pi.

2 HAT Test Terminals

Test terminals for Raspberry Pi GPIO pins.

The pin layout is the same as the Raspberry Pi connector, so you can freely use it for signal checking or connecting sensors.

3 DIP Connector

Connector for connecting TWELITE DIP or PAL.

Ensure Raspberry Pi is powered off before inserting or removing TWELITE.

Incorrect orientation of TWELITE DIP or PAL can cause damage. Be sure to connect in the orientation shown below.

Be sure to connect in the orientation shown below.

Frequent insertion/removal of TWELITE should be avoided as it may damage the connector.

Also, since TWELITE DIP has thin pin headers, after using TWELITE PAL especially, the fit may become unstable.

To avoid contact failures of the connector, please use the TWELITE R Attachment Kit.

4 DIP Test Terminals

Terminals to check input/output of TWELITE DIP or PAL.

LEDs or sensors can be connected to TWELITE. Also, connecting these to the HAT Test Terminals allows arbitrary pin connections between Raspberry Pi and TWELITE.

5 Power Check Terminals

Connects GND between TWELITE and Raspberry Pi via jumper pin.

Removing the jumper turns off TWELITE power. A switch can be installed to control power. You can also measure current by connecting a tester.

6 Operation Check Terminals

Used to check signals between Raspberry Pi and TWELITE.

By extending a harness and connecting to a 7P interface on TWELITE PAL or TWELITE CUE/ARIA/UART, application writing and configuration can be done from Raspberry Pi.

These terminals are for checking connection/communication with TWELITE PAL.

Do not connect TWELITE R2/R3, as VCC from Raspberry Pi and R2/R3 would short and cause damage.

How to Use

Connect TWELITE to TWELITE STAGE HAT

Connect TWELITE DIP or PAL to the TWELITE STAGE HAT.

Incorrect orientation of TWELITE may cause damage.

Connect TWELITE STAGE HAT to Raspberry Pi

Connect the TWELITE STAGE HAT to the Raspberry Pi.

Use M2.5 or M2.6 screws and spacers of 11–11.5 mm (11 mm recommended).

Power On the Raspberry Pi

Connect the power cable to the Raspberry Pi power connector and turn on the power.

Launch the TWELITE STAGE App

Install the TWELITE STAGE App in advance.

Raspberry Pi needs appropriate setup. See Precautions for Raspberry Pi.

Launch the TWELITE STAGE App and select ‘UART (serial0)’ in Serial Port Selection.

Hardware Specifications

Dimensions

Pin Mapping

TWELITE DIP/PAL	Raspberry Pi
`#3` / `DIO7` / `RX`	`#8` / `GPIO14`
`#10` / `DIO6` / `TX`	`#10` / `GPIO15`
`#7` / `DO1` / `PWM3` / `PRG`	`#16` / `GPIO23`
`#21` / `RST`	`#15` / `GPIO22`
`#15` / `DIO12` / `DI1` / `SET`	`#32` / `GPIO12`

Circuit Diagram

Precautions

During Raspberry Pi Startup

Due to GPIO23 behavior on boot, TWELITE may start in program mode. Before communicating, reset TWELITE by setting GPIO22 Low for approx. 10 ms.

Static Electricity and Short-Circuit Precautions

This is an electronic component. Observe general handling precautions, particularly avoiding short-circuits or ESD during operation.

Revision History

Version	Date	Details
1.0.0	2021-02-26	Initial Version
1.0.1	2025-03-18	Migrated to this site; updated structure