Example Read (MM2S) Path Timing - 6.3 English

AXI Video Direct Memory Access v6.3 Product Guide (PG020)

Document ID
PG020
Release Date
2022-06-08
Version
6.3 English

This Figure illustrates example timing on the MM2S channel for Vertical Size = 5 lines, Horizontal Size = 16, bytes, and Stride = 32 bytes. The figure shows the m_axi_mm2s and m_axis_mm2s interfaces.

Dataflow: After the reception of mm2s_fsync, AXI VDMA asserts m_axi_mm2s_arvalid with the start address on m_axi_mm2s_araddr. The signal m_axi_mm2s_arvalid is asserted five times to fetch five (vsize) lines of a frame. Read data from the mm side is stored in the line buffer and delivered on the streaming side by asserting m_axis_mm2s_tvalid. The signal m_axis_mm2s_tlast is asserted at the end of each line.

Figure 2-1:      Example MM2S Interface Timing

X-Ref Target - Figure 2-1

pg020_fig4_11_x13750.jpg