Datasheet

The touch screen also has a Chip Select line, labeled RT. This pin can theoretically be changed by cutting the jumper
trance and soldering a small wire from the right-hand pad to the pin you'd like to use.
On the ESP8266, RT is pin #16
On the ESP32, RT is pin #32
On theAtmega32u4, ATmega328P, nRF52840 SAMD21 M0 or SAMD51 M4 Feather, RT is pin #6
On the Teensy Feather, RT is pin #3
On the WICED Feather, RT is PC7
On the nRF52832 Feather, RT is #30
There is also an IRQ pin which is not connected to any pads but you can use to detect when touch events have
occured.
SD Card control pins
© Adafruit Industries https://learn.adafruit.com/adafruit-2-4-tft-touch-screen-featherwing Page 10 of 23