SDA (Serial Data) -> A4 on Uno/Pro-Mini, 20 on Mega2560/Due, 2 Leonardo/Pro-Micro SCK (Serial Clock) -> A5 on Uno/Pro-Mini, 21 on Mega2560/Due, 3 Leonardo/Pro-Micro ...
Epson XV7021BB SPI Driver for Arduino This is an example test library for the Epson XV7021BB using the 4-wire SPI interface. It is developed on the Arduino Zero or Teensy 3.6 development board ...