ADLINK Technology cPCI-7200 User Manual page 38

3. I_REQ & I_ACK Handshaking
IN I_REQ
IN I_ACK
D10~DI31
t
1
t
2
Note: I_REQ must be asserted until I_ACK asserts, I_ACK will be asserted
until I_REQ de-asserts.
4. O_REQ as output data strobe
Out O_REQ
D00~D031
t
s
28 Operation Theorem
t3
valid data
t1
0ns t 60ns
5
0ns t 1 PCI CLK Cycle
4
t
h
valid data
t
s
19ns t 2 PCI CLK Cycles
h
t5
t4
t2
t
3
t
cyc
T
valid data
2 PCI CLK Cycle
valid data
500ns
cyc