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lpc2478 output to vga

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lgeorge123

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I wish to use lpc2478 lcd controller output to lcd monitor (vga ). One of the problem is I don't know how to set the pixel clock (25M) in this IC . The datasheet do not mention how to set the pixel clock , can someone help me ??
 

Hi

Use a timer to divide the PLL frequency to the main pixel frequency

For instance if your PLL locked on 75 MHz you will need to divide by 3 (use the timer to count to 3 ) and the timer interrupt to flip an IO state 1-0-1-0 etc.

All the best

Bobi

The microcontroller specialist
 

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