Altera Arria V Avalon-MM - Manual (Page 34)

Signal Name Direction Description
RxmByteEnable__o[-1:0] Output Byte enable for write data.
RXMBurstCount__o[6 or
5:0]
Output The burst count, measured in qwords, of the RX write or
read request. The width indicates the maximum data
that can be requested. The maximum data in a burst is
512 bytes.
RXMWaitRequest__o Input Asserted by the external Avalon-MM slave to hold data
transfer.
RXMRead__o Output Asserted by the core to request a read.
RXMReadData__o[-1:0] Input Read data returned from Avalon-MM slave in response
to a read request. This data is sent to the IP core through
the TX interface. = 64 or 128 for the full-featured
IP core. = 32 for the completer-only IP core.
RXMReadDataValid__i Input Asserted by the system interconnect fabric to indicate
that the read data on is valid.
RxmIrq_[:0]
,
< 16 Input Indicates an interrupt request asserted from the system
interconnect fabric. This signal is only available when
the CRA port is enabled. Qsys-generated variations have
as many as 16 individual interrupt signals (≤15). If
rxm_irq_[:0]
is asserted on consecutive cycles
without the deassertion of all interrupt inputs, no MSI
message is sent for subsequent interrupts. To avoid
losing interrupts, software must ensure that all interrupt
sources are cleared for each MSI message received.
The following figure illustrates the RX master port propagating requests to the Application Layer and also
shows simultaneous, DMA read and write activity
4-4 RX Avalon-MM Master Signals
UG-01105_avmm
2014.12.15
Altera Corporation Interfaces and Signal Descriptions
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