I'm designing a circuit with this LCD display. It will interface with STM32L0 MCU over SPI bus. as you can see, in LCD's datasheet there are only 3 lines of SPI pins. SCL - Clock, SI - Serial Data and CS.
I've wondered, is it because the LCD only receives data from SPI Master and not sending back any data? Is it possible to use SPI bus like that with route only 3 pins?