LCD interface direclty using SPI

[Ravi Kumar S]

Hi,
I'm trying to interface monochrome LCD with microcontroller directly using SPI line. I saw this method used in a schematic, but i didn't understand how does it works. please help me with this problem. LCD pinout and controller pin mapping is attached
controller-pic24F

[Ravi Kumar S]

i'm sorry i missed LCD pin mapping image

[IDEngineer]

Many LCD controllers offer both parallel and SPI interfaces. When using SPI, one or more of the parallel data bits becomes MOSI, SCLK, etc. You need to consult the specific LCD controller spec sheet to learn how to put it into SPI mode.

[SiliconWizard]

So giving us the reference of the LCD controller would have been more useful here to help you than giving us the pin map.

[rpiloverbd]

Hello, Would you please mention which LCD controller you are using?

[jpanhalt]

Yes, knowing the display controller is essential.  I am currently using a Sitronics ST7567A GLCD, which takes SPI and is very quick.
https://www.crystalfontz.com/controllers/Sitronix/ST7567A/

The only problem is that with that interface you cannot read the display, e.g., the ready bit or anything else, so I use a buffer.

[Ground_Loop]

My 4x20 lcds have a similar pin out. I use a 16 bit shift register to convert the serial data and command string to parallel. Of course this is optimally done with 16 bit SPI.