A bit more video information

Sean Moss-Pultz sean_mosko at fic.com.tw
Tue Nov 28 03:19:16 CET 2006

I asked one of our hardware engineers to provide a bit more information
about the video prospects. Here is what he said:

"Certainly it can show some fps video. However, the LCD refresh bus
bandwidth will be determined by LCD display size, bit per pixel, memory bus
width, memory type ... and so on. For example, for 640x480,8bpp,60
frame/sec, 16-bit data bus, sdram HCLK = 60MHz:
The LCD data rate = 8x640x480x30/8 = 18.432 Mbyte/s
LCD DMA burst count = 18.432/16 = 1.152M/s
Pdma = (Trp+Trcd+CL+(2x4)+1)x(1/60Mhz) = 0.25(ms)
LCD system load = 1.152x250=0.288
So under such conditions, the neo1973 system bus occupation rate by LCD =

For details, please refer to as chaper 15 LCD Controller of S3C2410 user's
manual (download-able from Samsung semi-conductor web site)"

That download, BTW, is here:


Hope that helps somebody!


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