Altera V-Series Avalon-MM DMA - Manual (Page 38)

Figure 4-5: RXM Master Writes To Memory in the Avalon-MM Address Space
AvRxmAddress__o[63:0]
AvRxmWrite__o
AvRxmWriteData__o[31:0]
AvRxmByteEnable__o[3:0]
AvRxmWaitRequest__i
AvRxmRead__o
AvRxmReadDataValid__i
AvRxmReadData__i[31:0]
800041080
00001010 00000000 00000001 00003800 00000000
8000410C 80004110 80004114 80004118 80004100
128: for the bursting 128-bit Avalon-MM interface
TX Slave Module
The TX Slave module translates Avalon-MM master read and write requests to PCI Express TLPs for the
Root Port. The TX Slave Control module supports a single outstanding non-bursting request. It typically
sends status updates to the host. This is a 32-bit Avalon-MM slave bus.
Table 4-4: TX Slave Control
Signal Name Direction Description
TxsChipSelect_i Input When asserted, indicates that this slave interface is selected.
TxsRead_i Input When asserted, specifies an TX Avalon-MM slave read request
from the Root Complex or Root Port.
TxsWrite_i Input When asserted, specifies an TX Avalon-MM slave write request
to the Root Complex or Root Port.
TxsWriteData_i[-
1:0]
Input Specifies the Avalon-MM data for a write command.
TxsAddress_i[-1:0] Input Specifies the Avalon-MM byte address for the read or write
command. The width of this address bus is specified by the
parameter Address width of accessible PCIe memory space.
TxsByteEnable_i[3:0] Input Specifies the valid bytes for a write command.
TxsReadData_o[-
1:0]
Output Specifies the read completion data.
TxsReadDataValid_o Output
When asserted, indicates that
TxsReadData_o[31:0]
is valid.
UG-01154
2014.12.18
TX Slave Module 4-7
Interfaces and Signal Descriptions Altera Corporation
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