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TFT Display Interface Definitions

Blaze Display Technology Co., Ltd. | Updated: Nov 27, 2018

18-Bit RGB

Used to describe a clocked parallel TFT connection that uses 18 data lines (6 for Red, 6 for Green, 6 for Blue) as well as Hsync, Vsync, data enable, and pixel clock to transfer data to the TFT. Theoretical color depth is 218 or 262,144 colors.

 

24-Bit RGB

Used to describe a clocked parallel TFT connection that uses 24 data lines (8 for Red, 8 for Green, 8 for Blue) as well as Hsync, Vsync data enable, and pixel clock to transfer data to the TFT. Theoretical color depth is 224 or 16,777,216 colors.

 

6800

6800 is a parallel interface that uses Read/Write signal and an Enable signal to control the data bus. Communications with a display are only enabled when the enable signal is pulled high. The level of the Read/Write signal then determines whether data will be read from the display or written to the display. If the Read/Write signal is high, data will be read from the display whereas if the Read/Write signal is low, data will be written to the display. Sometimes the Write will be shown as a “notted” signal. For instance, there may be a bar over the name, a preceding exclamation mark, slash, or dash. While this looks like negation notation, in this context it simply means the signal is active low.

 

Difference Between 6800 and 8080

 

8080

 

The other common parallel interface is 8080 which uses separate read and write lines and no enable signal.

8080 is a parallel interface that uses separate Read and Write lines to control the data bus.

 

6800

 

The other common parallel interface is 6800 which uses a single Read/Write signal in combination with an Enable signal to control the data bus.

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