Just a few notes to facilitate the use of this LCD in SPI mode.

First we have to bridge the J3 pad located in the back of the PCB. This is the way the LCD has to switch between parallel and SPI communication.

Next, locate the 9×2 header in the front of the PCB. Pin 1 is the square one in the lower-left corner. Pin 18 is in top-right corner.

Just follow this pinout to connect to your micro controller. REMEMBER: this LCD has 3.3 volt logic, so use a level shifter like 4050 to connect to a 5 volt microcontroller.

Pin 1 -> GND

Pin 2 -> 3.3V

Pin 3 -> 3.3V

Pin 4 -> MOSI

Pin 5 -> SCL

Pin 6 -> 3.3V

Pin 7 -> 3.3V

Pin 8 -> 3.3V

Pin 9 -> 3.3V

Pin 10 -> 3.3V

Pin 11 -> 3.3V

Pin 12 -> 3.3V

Pin 13 -> 3.3V

Pin 14 -> A0

Pin 15 -> RST

Pin 16 -> CS

Pin 17 -> 3.3V through 270Ω resistor

Pin 18 -> GND

Support for this LCD is included in u8glib.