SPRUI30H November 2015 – May 2024 DRA745 , DRA746 , DRA750 , DRA756
Figure 9-65 shows VSYNC from Group 1 and ACTIVID(2) from Group 2 being used. ACTIVID is not toggling during the entire VBLNK interval. Set USE_ACTVID_HSYNC_N=’1’ and DISCRETE_BASIC_MODE=’1’.
Also, no automatic parsing of vertical ancillary data will be performed so the the Ancillary VPI port to the VPDMA should be turned off. All active video lines, since there are no vertical ancillary data lines, will appear in the Video DRAM buffer. Lines starting after an inactive to active transition on VSYNC will delineate a start of frame. Lines are denoted by an inactive to active transition of ACTIVID. Once a line starts, ACTIVID stays active for every pixel clock until the end of the line. Only those pixels gated by an active ACTIVID will be saved.