Feature Summary - 7.1 English

AXI DMA v7.1 LogiCORE IP Product Guide (PG021)

Document ID
Release Date
7.1 English
  • AXI4 compliant
  • Optional Independent Scatter/Gather Direct Memory Access (DMA) support
    • Provides offloading of DMA management work from the CPU
    • Provides fetch and update of transfer descriptors independent from primary data bus
    • Allows descriptor placement to be in any memory-mapped location separate from data buffers. For example, descriptors can be placed in block RAM.
    • Provides optional cyclic operation
  • Optional Direct Register Mode (no scatter/gather support)

    A lower performance but less FPGA-resource-intensive mode can be enabled by excluding the Scatter Gather engine. In this mode transfers are commanded by setting a Source Address (for MM2S) or Destination Address (For S2MM) and then specifying a byte count in a length register.

  • Primary AXI4 data width support of 32, 64, 128, 256, 512, and, 1,024 bits
  • Primary AXI4-Stream data width support of 8, 16, 32, 64, 128, 256, 512, and, 1,024 bits
  • Optional Data Re-alignment Engine for a stream data width up to 512 bits

    Allows data realignment to the byte (8 bits) level on the primary memory map and stream datapaths

  • Optional AXI Control and Status Streams to interface to AXI Ethernet IP

    Provides optional Control Stream for the MM2S Channel and Status Stream for the S2MM channel to offload low-bandwidth control and status from the high-bandwidth datapath.

  • Optional Micro mode

    AXI DMA can be configured to deliver a low footprint, low performance IP that can handle the transfer of small packets. Read the following chapters for more information.