The default I2C address for the FT5336 capacitive touch driver is 0x38.

STEMMA QT Connector

• STEMMA QT - This connector, located to the left of the on/off switch, allows you to connect to sensors and breakout boards with STEMMA QT / Qwiic connectors or to other things with various associated accessories.
• SDA/SCL - The I2C pins for the STEMMA QT connector are connected to the default I2C GPIO pins directly next to pin 5.
• 3.3V/GND - The power for the STEMMA QT connector is 3.3V. Ground is the common ground for power and logic.

Default SPI Pins

The TFT (connected to an HX8357 chipset) and microSD card on the FeatherWing are controlled via SPI.

• MOSI - This is the SPI MOSI (Microcontroller Out / Serial In) pin.
• MISO - This is the SPI MISO (Microcontroller In / Serial Out) pin.
• SCK - This is the SPI clock input pin.

TFT Control Pins and Jumpers

• DC - This is the display SPI data/command selector pin. By default, it is connected to pin 10. To change this, cut the jumper. Then, connect the signal pad (closest to the label on the board silk) to one of the available and compatible GPIO pads.
• TCS - This is the TFT SPI chip select pin. By default, is connected to pin 9. To change this, cut the jumper. Then, connect the signal pad (closest to the label on the board silk) to one of the available and compatible GPIO pads.
• LITE - This is the TFT backlight pad, located between the Feather headers and the TFT ribbon cable towards the top of the board. It is not connected to any pins by default. Pull this pin low to turn off the backlight.

microSD Card Slot

• On the back right edge of the FeatherWing is the microSD card slot. You can use any microSD card that supports SPI mode with one CS pin.

SD Card Pins and Jumper

• SCS - This is the SD card chip select pin. By default, it is connected to pin 5. To change this, cut the jumper. Then, connect the signal pad (closest to the label on the board silk) to one of the available and compatible GPIO pads.
• SDDET - This is the card detect pad, located to the left of the microSD card slot. It is not connected to any pins by default. This pin will read low when a card is not inserted.

Touch Screen Interrupt Jumper

• IRQ - This is the touchscreen interrupt pin for the FT5336. By default, it is connected to pin 6. To change this, cut the jumper. Then, connect the signal pad (closest to the label on the board silk) to one of the available and compatible GPIO pads.

Reset Button

• Reset - The reset button, located in the bottom left corner on the FeatherWing, is connected to the reset pin. It is mounted at a right angle so that it is easier to press.

On/Off (Enable) Switch

• ON/OFF - The On/Off switch, located on the bottom side of the FeatherWing, to the right of the STEMMA QT connector, is connected to the EN pin. You can disconnect 3.3V power by setting the switch to OFF.