AMBA中AXI3与AXI4信号的不同总结

写地址通道信号

AXI3(10/36)	AXI4(13/44)	Description
AWID[user]	AWID[user]
AWADDR	AWADDR
AWLEN[3:0]	AWLEN[7:0]	Note: incr3: 1-16, incr4: 1-256; fixed:1-16; wrap: 2,4,8 or 16.
AWSIZE[2:0]	AWSIZE[2:0]
AWBURST[1:0]	AWBURST[1:0]
AWLOCK[1:0]	AWLOCK[0]	Note
AWCACHE[3:0]	AWCACHE[3:0]	Note
AWPROT[2:0]	AWPROT[2:0]
-	AWQOS[3:0]	Note
-	AWREGION[3:0]	Note
-	AWUSER[0->128]	Note
AWVALID[0]	AWVALID[0]
AWREADY[0]	AWREADY[0]

写数据通道信号

AXI3(6/36)	AXI4(6/44)	Description
WID[user]		Note
WDATA[user]	WDATA[user]
WSTRB[wdata_width/8-1:0]	WSTRB[wdata_width/8-1:0]
WLAST[0]	WLAST[0]
-	WUSER[0->data_width/2->16]	Note
WVALID[0]	WVALID[0]
WREADY[0]	WREADY[0]

写响应通道信号

AXI3(4/36)	AXI4(5/44)	Description
BID[user]	BID[user]
BRESP[1:0]	BRESP[1:0]
-	BUSER[0->16]	Note
BVALID[0]	BVALID[0]
BREADY[0]	BREADY[0]

读地址通道信号

AXI3(10/36)	AXI4(13/44)	Description
ARID[user]	ARID[user]
ARADDR	ARADDR
AWLEN[3:0]	AWLEN[7:0]	Note: incr3: 1-16, incr4: 1-256; fixed:1-16; wrap: 2,4,8 or 16.
ARSIZE[2:0]	ARSIZE[2:0]
ARBURST[1:0]	ARBURST[1:0]
ARLOCK[1:0]	ARLOCK[0]	Note
ARCACHE[3:0]	ARCACHE[3:0]	Note
ARPROT[2:0]	ARPROT[2:0]
-	ARQOS[3:0]	Note
-	ARREGION[3:0]	Note
-	ARUSER[0->128]	Note
ARVALID[0]	ARVALID[0]
ARREADY[0]	ARREADY[0]

读数据通道信号

AXI3(6/36)	AXI4(7/44)	Description
RID[user]	RID[user]
RDATA[user]	RDATA[user]
RRESP[1:0]	RRESP[1:0]
RLAST[0]	RLAST[0]
-	RUSER[0->data_width/2->16]	Note
RVALID[0]	AVALID[0]
RREADY[0]	RREADY[0]

1. Channel transaction ID
   

2. Burst size
   

5.Burst type

6.Lock type

7.Memory type

8.Protect type

11. User signals only in AXI4