- 5.0V - Connected to the display backlight
- 3.3V - Connected to the display power and also the STEMMA QT / Qwiic connector
- GND - Ground for everything
The display is a 1.54" wide-angle TFT LCD.
- MOSI, SCK, GPIO #25, CE0 - These are the display control pins. Note that MISO is not connected, even though it is an SPI pin, because you cannot read back from the display.
- GPIO #26 - This is the display backlight pin. Used to turn on and off the backlight.
These pins have a 10K pullup to 3.3V so when the button is pressed or the joystick is moved/pressed, you will read a LOW voltage on these pins.
- GPIO#17 - Button
- GPIO #16 - Joystick select
- GPIO #22 - Joystick left
- GPIO #23 - Joystick up
- GPIO #24 - Joystick right
- GPIO #27 - Joystick down
- GPIO #18, GPIO#19, GPIO #20, GPIO #21 - I2S Digital Audio.
- Speakers - The two speaker connectors are located on the bottom in the middle, labeled Right and Left. Plug in an enclosed speaker or use a JST 2PH cable to attach custom speakers.
- Microphones - The two mics are in the middle of each side, labeled Left Mic and Right Mic.
- Headphones - A headphone jack is located on the bottom right. Use any headphones or Line-Out to another audio system.
- On/Off Switch - Located on the left, towards the top, switches audio on and off.
- SCL, SDA - I2C data for the STEMMA QT / Qwiic connector. Not used by buttons or display. Can also use with Grove sensors with an adapter cable. Great for quickly adding sensors or accessories with plug-and-play.
- GPIO#12 and GPIO #13 - 3-pin JST digital or analog connectors. Easily connect things like NeoPixels or servos using this 2mm connector. You can also use a generic JST cable to connect to a breadboard.
Three fully color RGB addressable LEDs can provide feedback or a light show. Uses DotStar protocol (not NeoPixel) so any microcomputer can easily control the lights.
- GPIO #5 - DotStar LED data pin.
- GPIO #6 - Dotstar LED clock pin.