Changes between Version 3 and Version 4 of HardwareInfo/video/RadeonHD_tech


Ignore:
Timestamp:
Oct 17, 2011, 7:35:45 PM (8 years ago)
Author:
kallisti5
Comment:

adding info on calculating PLL pixel clock

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  • HardwareInfo/video/RadeonHD_tech

    v3 v4  
    7979start is a simple table like EnableCrtc.  Let me know if you have any questions.
    8080}}}
     81
     82'''Calculating phase locked loops'''
     83PLL (Phase locked loop) is an electronic device to generate a programmable clock frequency. PLL computations can be *complex*... here is the simplified version which may apply to other video cards:
     84{{{
     85pixelClock = (pll reference frequency (xtal) * pll feedback divider) + (pll reference frequency (xtal) * pll's feedback divider decimal place ) / (pll's reference divider * post divider)
     86}}}