RapidIO II Intel® FPGA IP User Guide

ID 683444
Date 9/28/2020
Document Table of Contents Input/Output Avalon-MM Master Module

The Input/Output (I/O) Avalon-MM master Logical layer module is an optional component of the I/O Logical layer. This module receives RapidIO read and write request packets from a remote endpoint through the Transport layer module.
The I/O Avalon-MM master module translates the request packets into Avalon-MM transactions, and creates and returns RapidIO response packets to the source of the request through the Transport layer.
Note: The I/O Avalon-MM master module is referred to as a master module because it is an Avalon-MM interface master.
The I/O Avalon-MM master module can process a mix of NREAD and NWRITE_R requests simultaneously. The I/O Avalon-MM master module can process up to eight pending NREAD requests. If the Transport layer module receives an NREAD request packet while eight requests are already pending in the I/O Avalon-MM master module, the new packet remains in the Transport layer until one of the pending transactions completes.
Figure 12. I/O Master Block Diagram