TFT LCD interface type

[hendrix]

Hi ppl,

I like to figure out the TFT interface protocol that I am giving below from a site that I found (http://www.electricstuff.co.uk/ipodlcd.html) I tried contacting the site admin but, no luck. I need to learn the protocol to substitute the LCD for another smaller size. Here is the pin outs, as figured by the original author:

Pin   Function
1   Not Used
2   3.1V Supply
3   1.8V Presumably I/O supply. All I/Os run at 1.8v levels
4   0V
5   /Reset.
6   /CS  Chip select
7   /WR  write strobe
8   RS Selects command/data register ( called CD in some datasheets)
9   /RD read strobe
Data bus   Colour
10   D0   Blue 0
11   D1   Blue 1
12   D2   Blue 2
13   D3   Blue 3
14   D4   Blue 4
15   D5   Green 0
16   D6   Green 1
17   D7   Green 2
18   0V
19   D8   Green 3
20   D9   Green 4
21   D10   Green 5
22   D11   Red 0
23   D12   Red 1
24   D13   Red 2
25   D14   Red 3
26   D15   Red 4
27   0V
28   Vsync out. Goes high for 84.5us at  frame rate of 47Hz
29   0V
30   Backlight -
31   Backlight + Vf is 13.7V ( 4 white LEDs in series)
32   Not used

Can anyone help?

Thanks.

[marshallh]

There's nothing really unique about this particular screen, it's a typical single-ended (as opposed to LVDS used in larger screens with higher pixel clocks) LVCMOS interface with parallel RGB.

You can open up Digikey and check out datasheets for a similar screen. Optrex has one.

[mariush]

Do what that guy did.

Search for color LCDs and check the ones which have similar connectors:

http://www.digikey.com/product-search/en/optoelectronics/display-modules-lcd-oled-graphic/524918

For example, here's this one: http://www.digikey.com/product-detail/en/NHD-2.4-240320SF-CTXI%23-1/NHD-2.4-240320SF-CTXI%23-1-ND/2626410

The datasheet shows the pinout somewhat similar to your pinout: http://www.newhavendisplay.com/specs/NHD-2.4-240320SF-CTXI-1.pdf

And the same datasheet says :

Driver Information
Built?in ILI9340 controller.
See specification at http://www.newhavendisplay.com/app_notes/ILI9340.pdf

Go to that link and see how that driver works. Your screen may have the same functions as that ILI9340 ...