The AXI master interface data width and word size is 64 bits. The burst size can be programmed to 1, 4, 8, 16, or 256 words using DMA_Config [amba_burst_length] register bit.
The AXI DMA master always uses INCR type accesses. When performing data transfers, the burst length used can be programmed using bits [4:0] of the DMA configuration register. Either single or fixed length incrementing bursts up to a maximum of 256 are used as appropriate.
- 1xxxx: Attempt to use bursts of up to 16
- 01xxx: Attempt to use bursts of up to 8
- 001xx: Attempt to use bursts of up to 4
- 0001x: Use single word
- 00001: Use single word
- 00000: Attempt to use bursts of up to 256