ADLINK Technology cPCI-7200 User Manual page 39

5. O_REQ & O_ACK Handshaking
O_REQ
OUT_REQ
OUT_ACK
O_ACK
DO0~Do31
t
1 19ns
Note: O_ACK must be de-asserted before O_REQ asserts, O_ACK can be
asserted any time after O_REQ asserts, O_REQ will be reasserted after
O_ACK is asserted.
t
valid data
t
1
t
1 PCI CLK Cycle
2
t
3
2
t
5 PCI CLK Cycle
3
valid data
Operation Theorem 29