How to connect an 18-bit TFT on LCD Controller

[lpcware]

Content originally posted in LPCWare by Martin84 on Sun Jul 14 23:18:55 MST 2013
Hi everybody,

I want to connect an 18-bit TFT Display on the NXP LPC LCD Controller. In the user manual, there is a table (see attachment) shown, how to connect 16-bit and 24-bit TFT. But how should I use 18-bit? Could it be, that only 16- and 24-bit-Operation is possible?

I would try the 18-bit connection like this:

LCDVD23  BLUE5
LCDVD22  BLUE4
LCDVD21  BLUE3
LCDVD20  BLUE2
LCDVD19  BLUE1
LCDVD18  BLUE0

LCDVD15  GREEN5
LCDVD14  GREEN4
LCDVD13  GREEN3
LCDVD12  GREEN2
LCDVD11  GREEN1
LCDVD10  GREEN0

LCDVD7   RED5
LCDVD6   RED4
LCDVD5   RED3
LCDVD4   RED2
LCDVD3   RED1
LCDVD2   RED0

Did anybody test this configuration successfully or is it not possible to connect an 18-bit TFT to the LCD Controller?

Regards,

Martin

[lpcware]

Content originally posted in LPCWare by Martin84 on Mon Jul 15 03:05:42 MST 2013
Ok Wouter , thank you for your fast reply! That was the acknowledge I hoped for. :-)

[lpcware]

Content originally posted in LPCWare by Wouter on Mon Jul 15 02:33:26 MST 2013
Hi Martin,

To drive an 18-bit TFT, simply configure for 24-bit and skip the lower 2-bits of each color on the LCD-controller side (RED0, RED1, GREEN0, GREEN1, BLUE0, BLUE1). This seems to correspond to the table that you've provided.

The unused LCDVD pins can be assigned to another function without any problem.

Regards,
Wouter