Not understanding SSD1306 Oled display datasheet
Co is a continuation bit. If set to 1, the controller expects another control byte in this I2C write cycle. If set to 0, the controller will not expect to receive another control byte in this I2C write cycle.


Co = 0, D/C = 0: Next byte(s) are command (non-graphics) data, after
which I2C stop condition is expected
Co = 1, D/C = 0: Next byte(s) are command (non-graphics) data, after
which another control byte is expected
Co = 0, D/C = 1: Next byte(s) are graphs data, after which I2C stop
condition is expected
Co = 1, D/C = 1: Is illegal combination (I think)