I would like to control Nokia display through I2C shift register (PCA9556). But I can't figure out how I can send infromation byte through one pin. I know how to open or close the pin. Im try different tutorials but I sitll dont understand how I can do it..
Can you someone give me simple explanation how I can write address for I2C shift register with result to see on the pin for example 8-bit of information like 0x05?
Thank you for any help