Nios® V Embedded Processor Design Handbook

ID 726952
Date 7/08/2024
Public
Document Table of Contents

2.5. Assigning a Default Agent

Platform Designer allows you to specify a default agent which acts as the error response default agent. The default agent you designate provides an error response service for hosts that attempt non-decoded accesses into the address map.

The following scenarios trigger a non decoded event:

  • Bus transaction security state violation
  • Transaction access to undefined memory region
  • Exception event and etc.

A default agent should be assigned to handle such events, where undefined transaction is rerouted to the default agent and subsequently responds to Nios® V processor with an error response.