AXI BUS 신호
WRITE ADDRESS CHANNEL SIGNALS
--MASTER--
AWID : write address id
AWADDR : write address
AWLEN : Burst lentgh ex) AXI3 : AWLEN[3:0](1 to 16) AXI4 : AWLEN[7:0] (1 to 256)
AWSIZE : BURST SIZE ex) AWSIZE[2:0] Bytes in transfer. if AWSIZE = 0b001, 2 bytes in transfer
AWLOCK : Lock type, atomic characteristics of the transfer
AWCACHE : Memory type
AWPROT : Protection type
AWQOS : Quality of Service
AWREGION : Region identifier
AWUSER : User signal, Optional User-defined signal / AXI4
AWVALID : Write address valid
--SLAVE--
AWREADY : Write address ready, slave ready to accept an address
WRITE DATA CHANNEL SIGNALS
--MASTER--
WID : write ID tag
WDATA : write data
WSTRB : write strobes
WLAST : write last, last transfer in a write burst
WUSER : USER signal
WVALID : write valid, vlalid write data and strobes are available
--SLAVE--
WREADT : write ready
WRITE RESPONSE CHANNEL SIGNALS
--SLAVE--
BID : response id tag
BRESP : write response
BUSER : User signals
BVALID : write response valid
--MASTER--
BREADY : response ready
READ ADDRESS CHANNEL SIGNALS
--MASTER--
ARID : read address id
ARADDR : read address
ARLEN : burst length
ARSIZE : burst size