Altera PCI Compiler - Manual (Page 203)

Altera Corporation User Guide Version 11.1 3–129
October 2011
Functional Description
PCI Configuration Write Transaction from the pci_mt64 Local Master
Device to the Internal Configuration Space
Figure 3–47 shows the behavior of the pci_mt64 master performing a
configuration write transaction to internal configuration space. The local
master requests a 32-bit transaction by asserting the lm_req32n signal.
When requesting a configuration write transaction, the pci_mt64
function will automatically perform a single-cycle transaction. The local
master signals are asserted as if the pci_mt64 master is completing a
single-cycle 32-bit memory write transaction, similar to
Figure 3–43 in the
Master Mode Operation section. The pci_mt64 function’s internal
configuration space will respond to the transaction without affecting the
local side signals.
Figure 3–47 applies to both the pci_mt64 and
pci_mt32 MegaCore functions, excluding the 64-bit extension signals as
noted for pci_mt32.