External Memory Interface Handbook Volume 3: Reference Material

ID 683841
Date 7/24/2019
Public
Document Table of Contents

6.12.1.3. 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 80.  Avalon-MM Read Port Signals

Name

Bits

Direction

Function

reset

1

In

Reset

clk

1

In

Clock

read

1

In

Indicates read transaction

address

32

In

Address of the transaction

readdata

32, 64, 128, or 256

Out

Read data return

readdatavalid

1

Out

Flags valid cycles for read data return

waitrequest

1

Out

Indicates the need for additional cycles to complete a transaction. Needed for read operations when delay is needed to accept the read command.

burstcount

11

In

Transaction burst length

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