Altera cyclone V Technical Reference page 768

11-30
Avalon-MM Read Port
Related Information
Avalon Interface Specifications
Information about the Avalon-MM protocol
Avalon-MM Read Port
The Avalon-MM read ports are standard Avalon-MM ports used only to dispatch read operations. Each
configured Avalon-MM read port consists of the signals listed in the following table.
Table 11-17: Avalon-MM Read Port Signals
Name
reset
clk
read
address
readdata
readdatavalid
waitrequest
burstcount
Related Information
Avalon Interface Specifications
Information about the Avalon-MM protocol
AXI Port
The AXI port uses an AXI-3 interface. Each configured AXI port consists of the signals listed in the
following table. Because the AXI protocol allows simultaneous read and write commands to be issued, two
SDRAM control ports are required to form an AXI interface.
Table 11-18: AXI Port Signals
Name
ARESETn
Altera Corporation
Bits
1
1
1
32
32, 64, 128, or 256
1
1
11
Bits Direction
1 In
Direction
In Reset
In Clock
In Indicates read transaction
In Address of the transaction
Out Read data return
Out Flags valid cycles for read data return
Out Indicates the need for additional cycles to
complete a transaction. Needed for read
operations when delay is needed to accept
the read command.
In Transaction burst length
Channel
n/a Reset
2016.10.28
Function
Function
SDRAM Controller Subsystem
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