topic How to connect an 18-bit TFT on LCD Controller in LPC Microcontrollers

How to connect an 18-bit TFT on LCD Controller

lpcware — Wed, 15 Jun 2016 17:14:18 GMT

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

Re: How to connect an 18-bit TFT on LCD Controller

lpcware — Wed, 15 Jun 2016 17:14:19 GMT

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

Re: How to connect an 18-bit TFT on LCD Controller

lpcware — Wed, 15 Jun 2016 17:14:20 GMT

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. :-)