the address input selects the pixel, the color inputs (red green and blue, all 4 but inputs) selects the color of the pixel (1111 red, 1111 blue, 1111 green make white pixels), the rest input resets the display, refresh refreshes the display and clock is obviously for the clock. the rgb display also has 3 outputs, one for each color, which makes it so when a pixel address is selected, it'll output whatever color that pixel is. the thing about this display is that you can only modify one pixel at a time, instead of multiple at once like the seven segment display.