128x64 Version 1.0 OLED
The version 1 128x64 OLED runs at 3.3V and does not have a built in level shifter so you'll need to use a level shifting chip to use with a 5V microcontroller. The following will assume that is the case. If you're running a 3.3V microcontroller system, you can skip the level shifter.(Note: If using the display with other SPI devices, D/C, CLK and DAT may be shared, but CS must be unique for each device.)