Altera Avalon Verification IP Suite - Manual (Page 46)

Chapter 3: Avalon-MM Slave BFM 3–3
Functional Description
May 2011 Altera Corporation Avalon Verification IP Suite User Guide
Timing
The timing diagram in Figure 3–2 illustrates the sequence of events for an Avalon-MM
Slave BFM responding to interleaved writes and reads when the readdatavalid
signal is present.
Figure 3–2. Avalon-MM Slave Responding to Interleaved Write and Read Transactions
CLK
read
transaction1 transaction2 trans3 trans4
write
S
cr_1
waitrequest
byteenable[3:0]
writedata[31:0]
readdatavalid
readdata
D1 D3
D2 D4
T
wr
T
wt_1
T
wt_2
T
rl_1
T
rl_2
S cr_2
S
cr_3
S
cr_4
transactionid
writeresponse
writeid
ID_1 ID_3
writeresponsevalid
T
rl_1
readresponse
readid
ID_2 ID_4
S
rc_2
S
rc_4
S rc_1 S rc_3
T ID_1
T
ID_2 T ID_3