Altera PCI Compiler - Manual (Page 308)

7–40 User Guide Version 11.1 Altera Corporation
PCI Compiler October 2011
PCI Master Operation
Figure 7–11. Ordering Logic for Avalon-to-PCI Direction
A2P Command/Write
Data Buffer
(FIFO)
Read/Write Commands and
Write Data from Avalon
Valid from Read
Ctrl State Machine
Valid from Read
Ctrl State Machine
Read Data from
Avalon NonP Port
Read Data from
Avalon Pref Port
Read/Write Commands
and Write Data in PCI
P2A Pref Pending
Read Data 0
P2A Pref Pending
Read Data 1
P2A Pref Pending
Read Data N
P2A NonP Read
Data Reg
Data
Valid 0
Data
Valid 1
Data
Valid N
NP Data
Valid
Data
Valid 0
Data
Valid 1
Data
Valid N
Data to PCI
To PCI Target Ctrl
Data to PCI
To PCI Target Ctrl
Data to PCI
To PCI Target Ctrl
Data to PCI
To PCI Target Ctrl
NP Data
Valid
A2P = Avalon-to-PCI
P2A = PCI-to-Avalon