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AD9984A how to distinguish these resolutions have same lines per frame

Question asked by huahu on Oct 30, 2013
Latest reply on Nov 6, 2013 by huahu

I am confused the AD9984A only have the register 0x26,0x27 to read the total lines per frame. But some resolutions,e.g.1400X1050 and 1680X1050, have the same lines per frame. When 1400X1050 is input,how to correctly detect the resolution as 1400X1050,not 1680X1050?  They have the very similar parameters as show below: