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1.5.4 Downscaling
Panel Clock frequency < Source Clock frequency
Panel Hsync frequency < Input Hsync frequency
Panel Vsync frequency = Input Vsync frequency
This mode is used when the input resolution is greater than the panel resolution, to provide enough of a display to
enable the user to recover to a supported resolution. The input clock is operated at a frequency less than that of the
input pixel rate(under-sampled horizontally) and the scaling filter is used to drop input lines. In this mode, zoom
scaling must be disabled
1.5.5 Destination Stand Alone
Panel Clock = DCLK in open loop (not locked)
Panel Hsync frequency = DCLK frequency / (Destination Htotal register value)
Panel Vsync frequency = DCLK frequency / (Dest. Htotal register value * Dest. Vtotal register
value)
This mode is used when the input is changing or not available. The OSD may still be used as in all other display
modes and stable panel timing signals are produced. This mode may be automatically set when the gmZAN1 detects
input timing changes that could cause out- of-spec operation of the panel.
1.5.6 Source Stand Alone
Panel Clock = DCLK in open loop (not locked to input Hsync)
Panel Hsync frequency = SCLK frequency / (Source Htotal register value)
Panel Vsync frequency = SCLK frequency / (Source Htotal register value *Source Vtotal
register value)
This mode is used to display the pattern generator data. This mode may be useful for testing an LCD panel on the
manufacturing line (color temperature calibration, etc.).