Native Video (Vectored DE) Interface - 1.2 English

HDMI 2.1 Transmitter Subsystem Product Guide (PG350)

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1.2 English

AXI4-Stream can only support resolutions with video timing (HActive) divisible by PPC (4 or 8) and native video interface can only support resolutions with video timings (HActive,HSync,HTotal) divisible by PPC (4). To extend support to resolutions with video timing not divisible by PPC, the Native Video (Vectored Date Enable (DE)) interface can be used. The following table shows the signals. The data width is user-configurable in the Vivado IDE by setting Max Bits Per Component (BPC) and Number of Pixels Per Clock on Video Interface (PPC).

Table 1. Native Video (Vectored DE) Interface
Name I/O Width Description
video_clk 1 I 1 Video clock
video_de_arb I PPC Active video
video_data_arb I video_data_width 3 Data
video_hs_arb I PPC Horizontal sync
video_vs_arb I PPC Vertical sync
  1. video_clk is generated by the HDMI PHY Controller/HDMI GT Subsystem.
  2. When native video/native video (Vectored DE) interface is selected, s_axis_video_aclk and s_axis_video_aresetn are removed from the HDMI 2.1 TX Subsystem interface ports.
  3. video_data_width = 3*BPC*PPC
Important: In Native/Native (Vectored DE) interface, you should send the video data on video_clk, when video_cke_out is high.This will gate the video clock to adjust for the correct pixel clock rate of video resolution.