Cyclone® 10 GX Core Fabric and General Purpose I/Os Handbook

ID 683775
Date 7/08/2024
Public
Document Table of Contents

7.4.2. Configuration Sequence in the Remote Update Mode

Figure 149. Transitions Between Factory and Application Configurations in Remote Update Mode


Upon power up or reconfiguration triggered using nCONFIG, the AS controller reads the start address from the EPCQ-L device and loads the initial configuration image, either the factory or application configuration image. If the initial image is an application configuration image and an error occurs, the controller tries to load the same initial application configuration image for three times before loading the factory configuration image. If the initial application configuration image encounters a user watchdog timeout error, the controller loads the factory configuration image. You can load a new application configuration image during factory user mode or application user mode. If an error is encountered, the controller loads the factory configuration image.

Note: When error occurs, the AS controller loads the same application configuration image for three times before reverting to factory configuration image. By that time, the total time taken exceeds 100 ms and violates the PCIe* boot-up time when using CvP. If your design is sensitive to the PCIe* boot-up requirement, Altera recommends that you do not use the direct-to-application feature.