I’ve been testing a 1.44″ LCD for an arduino project. These are fairly inexpensive LCD displays and does connect over SPI. Those who are using Nokia 5110 LCD displays can get this for almost the same price. They have a resolution of 128×128.
I’ve used an Arduino Nano. Connect the Nano to the display via the SPI pins
For the Real Time Clock, I’ve used the DS3231 RTC with an onboard coin cell battery. It’s a high-speed Low-cost, extremely accurate I2C real-time clock (RTC), with an integrated temperature-compensated crystal oscillator (TCXO) and crystal. It also has a AT24C32 memory chip that can be used for storing data. Being an I2C device, it can communicate with the arduino via just the SCL(A5) and SDA(A4) pins.
Connect the VCC to the 5v pin and the GND to the ground rail of the arduino.
After powering up the arduino, if everything is connected right, you should see a blank white screen.