Table: AXI Infrastructure Core Slave I/O Signals lists the Slave Interface signals for the cores.
Signal Name |
Direction |
Default |
Width |
Description (Range) |
---|---|---|---|---|
s_axi_aclk |
Input |
REQ |
1 |
Slave interface clock input. AXI Clock Converter and Data Width Converter core only. |
s_axi_aresetn |
Input |
REQ |
1 |
Slave interface reset input (active-Low). AXI Clock Converter and Data Width Converter core only. |
s_axi_awid |
Input |
AXI3, AXI4: 0 AXI4-Lite: d/c |
ID_WIDTH |
Write Address Channel Transaction ID |
s_axi_awaddr |
Input |
REQ |
ADDR_WIDTH |
Write Address Channel Address |
s_axi_awlen |
Input |
AXI3, AXI4: 0 AXI4-Lite: d/c |
AXI4: 8 AXI3: 4 |
Write Address Channel Burst Length (0–255) |
s_axi_awsize |
Input |
AXI3, AXI4: REQ(1) AXI4-Lite: d/c |
3 |
Write Address Channel Transfer Size |
s_axi_awburst |
Input |
AXI3, AXI4: REQ(1) AXI4-Lite: d/c |
2 |
Write Address Channel Burst Type code (0–2). |
s_axi_awlock |
Input |
AXI3, AXI4: 0 AXI4-Lite: d/c |
AXI4: 1 AXI3: 2 |
Write Address Channel Atomic Access Type (0, 1) |
s_axi_awcache |
Input |
AXI3, AXI4: 0(2) AXI4-Lite: d/c |
4 |
Write Address Channel Cache Characteristics |
s_axi_awprot |
Input |
0b000(3) |
3 |
Write Address Channel Protection Bits |
s_axi_awqos(4) |
Input |
AXI4: 0 AXI4-Lite: d/c |
4 |
AXI4 Write Address Channel Quality of Service |
s_axi_awregion |
Input |
AXI4: 0; AXI3, AXI4-Lite: d/c |
4 |
AXI4 Write Address Channel address region index |
s_axi_awuser(5) |
Input |
AXI3, AXI4: 0 AXI4-Lite: d/c |
AWUSER_WIDTH |
User-defined AW Channel signals |
s_axi_awvalid |
Input |
REQ |
1 |
Write Address Channel Valid |
s_axi_awready |
Output |
|
1 |
Write Address Channel Ready |
s_axi_wid |
Input |
AXI3: 0 AXI4, AXI4-Lite: d/c
|
ID_WIDTH |
Write Data Channel Transaction ID for AXI3 masters |
s_axi_wdata |
Input |
REQ |
Data Width Converter: S_AXI_DATA_WIDTH; Others: DATA_WIDTH |
Write Data Channel Data |
s_axi_wstrb |
Input |
all ones |
Data Width Converter: S_AXI_DATA_WIDTH/8; Others: DATA_WIDTH/8 |
Write Data Channel Byte Strobes |
s_axi_wlast |
Input |
AXI3, AXI4: 0 AXI4-Lite: d/c |
1 |
Write Data Channel Last Data Beat |
s_axi_wuser(5) |
Input |
AXI3, AXI4: 0 AXI4-Lite: d/c |
WUSER_WIDTH |
User-defined W Channel signals |
s_axi_wvalid |
Input |
REQ |
1 |
Write Data Channel Valid. |
s_axi_wready |
Output |
|
1 |
Write Data Channel Ready. |
s_axi_bid |
Output |
|
ID_WIDTH |
Write Response Channel Transaction ID. |
s_axi_bresp |
Output |
|
2 |
Write Response Channel Response Code (0–3). |
s_axi_buser(5) |
Output |
|
BUSER_WIDTH |
User-defined B Channel signals. |
s_axi_bvalid |
Output |
|
1 |
Write Response Channel Valid. |
s_axi_bready |
Input |
REQ |
1 |
Write Response Channel Ready. |
s_axi_arid |
Input |
AXI3, AXI4: 0 AXI4-Lite: d/c |
ID_WIDTH |
Read Address Channel Transaction ID. |
s_axi_araddr |
Input |
REQ |
ADDR_WIDTH |
Read Address Channel Address. |
s_axi_arlen |
Input |
AXI3, AXI4: 0 AXI4-Lite: d/c |
AXI4: 8 AXI3: 4 |
Read Address Channel Burst Length code (0–255). |
s_axi_arsize |
Input |
AXI3, AXI4: REQ(1) AXI4-Lite: d/c |
3 |
Read Address Channel Transfer Size code (0–7). |
s_axi_arburst |
Input |
AXI3, AXI4: REQ(1) AXI4-Lite: d/c |
2 |
Read Address Channel Burst Type (0–2). |
s_axi_arlock |
Input |
AXI3, AXI4: 0 AXI4-Lite: d/c |
AXI4: 1 AXI3: 2 |
Read Address Channel Atomic Access Type (0, 1). |
s_axi_arcache |
Input |
AXI3, AXI4: 0(2) AXI4-Lite: d/c |
4 |
Read Address Channel Cache Characteristics. |
s_axi_arprot |
Input |
0b000(3) |
3 |
Read Address Channel Protection Bits. |
s_axi_arregion |
Input |
AXI4: 0; AXI3, AXI4-Lite: d/c |
4 |
AXI4 Read Address Channel address region index |
s_axi_arqos(4) |
Input |
AXI4: 0 AXI4-Lite: d/c |
4 |
AXI4 Read Address Channel Quality of Service. |
s_axi_aruser(5) |
Input |
AXI3, AXI4: 0 AXI4-Lite: d/c |
ARUSER_WIDTH |
User-defined AR Channel signals. |
s_axi_arvalid |
Input |
REQ |
1 |
Read Address Channel Valid. |
s_axi_arready |
Output |
|
1 |
Read Address Channel Ready. |
s_axi_rid |
Output |
|
ID_WIDTH |
Read Data Channel Transaction ID. |
s_axi_rdata |
Output |
|
Data Width Converter: S_AXI_DATA_WIDTH; Others: DATA_WIDTH |
Read Data Channel Data. |
s_axi_rresp |
Output |
|
2 |
Read Data Channel Response Code (0–3). |
s_axi_rlast |
Output |
|
1 |
Read Data Channel Last Data Beat. |
s_axi_ruser(5) |
Output |
|
RUSER_WIDTH |
User-defined R Channel signals. |
s_axi_rvalid |
Output |
|
1 |
Read Data Channel Valid. |
s_axi_rready |
Input |
REQ |
1 |
Read Data Channel Ready. |
Notes: 1.Xilinx recommends that AXI4 master devices drive their aw/rsize and aw/rburst outputs. Typically, a master device drives an aw/rsize value that corresponds to its interface data width, unless application requirements dictate otherwise. Typically, a master device drives its aw/rburst output to 0b01, which indicates an incremental (INCR) burst. 2.Xilinx recommends that master devices drive their aw/rcache outputs to 0b0011 to allow the AXI Interconnect core to pack data while performing width conversion and to allow store-and-forward in datapath FIFOs. 3.AXI protocol requires master devices to drive their aw/rprot output. If the aw/rprot signals are left undriven, it would default to all zeros and the transaction would be interpreted as secure. 4.Although the QOS signals are defined only by the AXI4 protocol specification, this interconnect IP core also propagates QOS signals for any SI slot configured as AXI3. |