david_prentice:
PCA9556 is a port expander and not a shift register.
Which Nokia display?The common Nokia displays are SPI. You can bit-bang the SPI via the port expander. But you might just as well write directly to the SPI.
David.
84*48 LCD Display Module White Backlight LCD with PCB for Nokia 5110
Yes but I cant use SPI because I do not have any remain free slots. I need to use I2C comunication to drive Nokia display..