We are going to use VPIF to do OSD menu, but errors exist in schematic design, VP_CLKIN2 without external reference clock, only VP_CLKIN3 with the reference clock. Assuming BT.656 format is adopted, can channel 3 be used separately? The manual only says that channel 2 can be turned on for single-channel output, but it does not say whether channel 3 can also be used. In addition, whether VPIF output reference clock must use VP_CLKIN, have other internal clock can be used?
