> Hi All,
>
> I'm new to OLED displays but have used the Nokia 5110 in couple of my
> previous projects. I believe that they both work the same way (SPI-
> Data in, CLK in, CS, D/C, RST) , just the init sequence is a bit
> different.
>
> I believe that CS signal can be omitted if there is only one device on
> the SPI bus. If I tie it low, the display will always be selected and
> any transaction on the SPI bus will be directed towards the OLED
> display. This way I can save a signal pin, would there be any issues?
>
>
> Thanks,
>
>
> Chetan Bhargava
>


I've heard of this being done, but I've always wondered how you tell which
bit is which. With CSn, the msb is clearly the first bit after CSn goes
low. If CSn is always low, how do you know which bit is which?

Harold


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