i.MX RT1050 parallel RGB LCD H-res / dot clock rating

cancel
Showing results for 
Search instead for 
Did you mean: 

i.MX RT1050 parallel RGB LCD H-res / dot clock rating

300 Views
Contributor II

What is the maximum dot clock / what is the maximum RGB dots per HSYNC that can be supported ?  (DPI interface)

Wanting to use 1280 pixel horizontal in RGB666

Labels (1)
0 Kudos
2 Replies

51 Views
NXP TechSupport
NXP TechSupport

Hi,

>>What is the maximum dot clock ?

The LCD_DOTCLK is max 75MHz, see LCDIF_CLK_ROOT in Reference Manual, please!

>>what is the maximum RGB dots per HSYNC that can be supported ?

HSYNC is determined by dotclock, resolution & Frames per second.

>>Wanting to use 1280 pixel horizontal in RGB666

LCDIF on i.MXRT1050 supprts WXGA(1280x800), which is max resolution, you can calculate dot clock according to requirments, assume 60fps & 50fps & 30fps:    

    --  dot clock = 1280x800 * 60 * 130% =79.872MHz.  >  75MHz

        dot clock = 1280x800 * 50 * 130% =51.2MHz.      <  75MHz

        dot clock = 1280x800 * 30 * 130% =39.936MHz.  < 75MHz

         [ 30% is reserved for "blank" ]

      Taking 30fps an example:

   -- display data (Byte) = 1280x800 *3*30 = 92.16MB/s

      If external SDRAM can work at 166MHz,  the resolution should be OK.

      So you can evaluate it according to your requirments.

Have a nice day!

Weidong Sun

0 Kudos

51 Views
Contributor III

Hi

How can I set LCD PANEL CLOCK ? I use an MXRT 1050 microprocessor.  I need to know which registers I have to set.

Thank you

Best Regards

Giovanni Grondona

0 Kudos