Hi, Can somebody explain to me what a 'beat' is in data transfer in AXI protocol ? The documentations says: Burst size ------------------ Table 4-2 shows how the ARSIZE or AWSIZE signal specifies the maximum number of data bytes to transfer in each beat, or data transfer, within a burst. Table 4-2 Burst size encoding ARSIZE[2:0] AWSIZE[2:0] Bytes in transfer b000 1 b001 2 b010 4 b011 8 b100 16 b101 32 b110 64 b111 128 The AXI determines from the transfer address which byte lanes of the data bus to use for each transfer. For incrementing or wrapping bursts with transfer sizes narrower than the data bus, data transfers are on different byte lanes for each beat of the burst. The address of a fixed burst remains constant, and every transfer uses the same byte lanes. The size of any transfer must not exceed the data bus width of the components in the transaction. Thanks.