Which clock frequency for LCD Controller?

[lpcware]

Content originally posted in LPCWare by Martin84 on Wed Jul 17 06:37:29 MST 2013
Hi everybody,

I wanna control an 5.7Inch TFT Display. The clock frequency of this display is 25.175MHz. Now I'm thinking about how to create this 25.175MHz. In the datasheet, there is no tolerance given. Is it possible to use a 12MHz * 2 = 24MHz frequency or do I have to use exactly the 25.175MHz?

Or should I use a higher frequency?

Regards,

Martin

[lpcware]

Content originally posted in LPCWare by wellsk on Wed Jul 17 10:49:00 MST 2013
Getting as close as possible will probably give you the best image, but you can use an approximate frequency and it should be fine - and will probably not be noticeable.

We've run displays rated at about a 25MHz pixel clock as low as 10MHz (very slow refresh, flickering) and as high as 40+MHz (images tend to get saturated on some displays).