Then we also have to connect pins RS, WR, CS and REST to whichever pins we like (we must declare these pins in our sketch, see UTFT documentation). So we have to connect signals D0 through to D15 to the necessary digital pins. Note that the connections are made according to UTFT’s documentation and are applicable specifically to UTFT. Above and below the signal lines I have noted the actual Arduino pins that correspond to the signals.įor example, pin 2 (the second pin on the flex cable looking at it from the left) corresponds to the DB0 signal which should be connected to the D37 pin on the Arduino MEGA (or Due). What we have here is the actual conductor number in the grey background (counting the conductors in the ribbon cable from left to right) and then above and below them the corresponding signal lines according to the above pinout. At first I thought I’d try to make sense of it as I went but it didn’t take long for me to realize that it would actually save me time if I made a “conversion table”. This is nice, but I want to use a standard 40-pin ribbon cable which I have left over from an old computer, and its conductor numbering is a little different.

This is its pinout according to the manufacturer: The below instructions apply to a generic 3.2″ TFT with wide aspect ratio and resolution of 240 x 400 that I got off of Ebay. The answer of course depends on the exact model of the TFT that we have on hand. I’ve been asked what is the correct way to wire a 3.2″ TFT to an Arduino MEGA (or Due) in order to make it work with the UTFT library. Still, keep in mind that the info posted below still applies and is probably useful.

Arduino mega vs due pinout