Altera PCI Compiler - Manual (Page 73)

Altera Corporation User Guide Version 11.1 2–15
October 2011
Parameter Settings
17 MW_CBEN_ENA 0 In a standard master burst transaction the byte
enables accompanying the initial data word
provided by the local side are used throughout the
master burst transaction. Turning on Allow
Variable Byte Enables During Burst
Transactions allows byte enables to change for
successive data words during the transaction.
This option affects both burst memory read and
burst memory write master transactions.
However, use this option only for burst memory
write master transactions. Refer to
“Burst Memory
Write Master Transaction with Variable Byte
Enables” on page 3–119
for more information.
For burst memory read master transactions, you
must keep the byte enables constant throughout
the transaction. Typically the byte enable values
are set to 0 for bust memory read master
transactions.
31..18 Reserved 0 Reserved.
Note to Table 2–2 :
(1) These parameters affect master functionality and therefore only affect the pci_mt64 and pci_mt32 MegaCore
functions.
Table 2–2. Bit Definition of the ENABLE_BITS Parameter (Part 5 of 5)
Bit
Number
Bit Name
Default
Value
Definition