Nios® V Embedded Processor Design Handbook

ID 726952
Date 12/04/2023
Document Table of Contents

2.5. Assigning a Default Agent

Platform Designer allows you to specify default agent which act 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 event, where undefined transaction is rerouted to the default agent and subsequently responds to Nios® V processor with an error response.